公司的一个新项目使用ASP.NET MVC开发，经理让我写个OracleHelper，我从网上找了一个比较全的OracleHelper类，缺点是查询的时候返回DataSet，数据增删改要写很多代码(当然，可以用代码生成器，不过配套的代码生成器暂时没有)；又从网上找了一个封装了泛型方法的OracleHelper类，整合到一起，但貌似数据增删改查依然不方便；于是花了两天时间，在原有基础上对增删改查分页查询操作进行了面向对象的封装，并且对批量增删改操作进行事务封装，写事务代码更方便。
原理：
1、利用反射对增删改查进行面向对象的封装
2、事务：如果没有开启事务(没有调用OracleHelper类的BeginTransaction方法)，则按原来的方法创建连接，操作数据库，然后关闭连接；如果开启了事务(调用了OracleHelper类的BeginTransaction方法)，则一次Http请求使用同一个OracleConnection，增删改操作后不关闭连接，先提交事务，事务提交后才关闭连接，下次Http请求再重新创建一个OracleConnection。
说明：
OracleHelper类包含如下功能：
1、基础方法(执行简单SQL语句；执行带参数的SQL语句；存储过程操作；)
2、扩展方法(泛型方法)
3、增删改查(封装了增删改查分页查询操作；查询主表数据时，关联表数据作为主表的类的属性直接查询出来，而不只是关联表数据的ID；添加操作，关联表数据和主表数据要分别添加(使用事务确保一致性)；删除操作，关联表数据和主表数据要分别删除(使用事务确保一致性)；修改操作，如果关联表的是新增的(即ID变了)，要先添加关联表数据，再更新主表数据，如果关联表不是新增的(即ID没变)，则只需要更新主表，方法中会自动更新关联表(关联表如果还有关联表也支持))
4、事务
代码：
OracleHelper.cs：
using System;
using System.Collections;
using System.Collections.Generic;
using System.Configuration;
using System.Data;
using System.Data.OracleClient;
using System.Linq;
using System.Reflection;
using System.Text;
using System.Xml.Linq;
using Models;
using System.Web; namespace DBUtil
{
/// <summary>
/// Oracle操作类
/// 2014年9月25日
/// 写程序之前，首先引用System.Data.OracleClient
/// </summary>
public class OracleHelper
{
#region 变量
/// <summary>
/// 数据库连接字符串
/// </summary>
public static string connectionString = ConfigurationManager.ConnectionStrings["DefaultConnection"].ToString();
#endregion #region 事务的OracleConnection
#region 数据库连接对象
/// <summary>
/// 获取打开的数据库连接对象
/// </summary>
public static OracleConnection GetOpenConnection()
{
OracleConnection connection = null; string key = "Simpo_FQD_OracleConnection"; if (HttpContext.Current.Items[key] == null)
{
connection = new OracleConnection(connectionString);
connection.Open();
HttpContext.Current.Items[key] = connection;
}
else
{
connection = (OracleConnection)HttpContext.Current.Items[key];
} return connection;
}
#endregion #region 事务对象
/// <summary>
/// 获取事务对象
/// </summary>
public static OracleTransaction GetTran()
{
OracleTransaction tran = null; string key = "Simpo_FQD_OracleTransaction"; if (HttpContext.Current.Items[key] == null)
{
tran = GetOpenConnection().BeginTransaction();
HttpContext.Current.Items[key] = tran;
}
else
{
tran = (OracleTransaction)HttpContext.Current.Items[key];
} return tran;
}
#endregion #region 开起事务标志
/// <summary>
/// 事务标志
/// </summary>
private static string tranFlagKey = "Simpo_FQD_OracleTransaction_Flag";
/// <summary>
/// 添加事务标志
/// </summary>
public static void AddTranFlag()
{
HttpContext.Current.Items[tranFlagKey] = true;
}
/// <summary>
/// 移除事务标志
/// </summary>
public static void RemoveTranFlag()
{
HttpContext.Current.Items[tranFlagKey] = false;
}
/// <summary>
/// 事务标志
/// </summary>
public static bool TranFlag
{
get
{
bool tranFlag = false; if (HttpContext.Current.Items[tranFlagKey] != null)
{
tranFlag = (bool)HttpContext.Current.Items[tranFlagKey];
} return tranFlag;
}
}
#endregion
#endregion #region 基础方法
#region 公用方法
#region GetMaxID
/// <summary>
/// 不支持多用户并发，慎用，请使用GetNextID方法
/// </summary>
private static int GetMaxID(string fieldName, string tableName)
{
string strsql = "select max(" + fieldName + ")+1 from " + tableName;
object obj = OracleHelper.GetSingle(strsql);
if (obj == null)
{
return ;
}
else
{
return int.Parse(obj.ToString());
}
}
#endregion #region Exists
public static bool Exists(string strSql, params OracleParameter[] cmdParms)
{
object obj = OracleHelper.GetSingle(strSql, cmdParms);
int cmdresult;
if ((Object.Equals(obj, null)) || (Object.Equals(obj, System.DBNull.Value)))
{
cmdresult = ;
}
else
{
cmdresult = int.Parse(obj.ToString());
}
if (cmdresult == )
{
return false;
}
else
{
return true;
}
}
#endregion
#endregion #region 执行简单SQL语句
#region Exists
public static bool Exists(string SQLString)
{
using (OracleConnection connection = new OracleConnection(connectionString))
{
using (OracleCommand cmd = new OracleCommand(SQLString, connection))
{
try
{
connection.Open();
object obj = cmd.ExecuteScalar();
if ((Object.Equals(obj, null)) || (Object.Equals(obj, System.DBNull.Value)))
{
return false;
}
else
{
return true;
}
}
catch (System.Data.OracleClient.OracleException e)
{
connection.Close();
throw new Exception(e.Message);
}
finally
{
cmd.Dispose();
connection.Close();
}
}
}
}
#endregion #region 执行SQL语句，返回影响的记录数
/// <summary>
/// 执行SQL语句，返回影响的记录数
/// </summary>
/// <param name="SQLString">SQL语句</param>
/// <returns>影响的记录数</returns>
public static int ExecuteSql(string SQLString)
{
OracleConnection connection = GetOpenConnection();
using (OracleCommand cmd = new OracleCommand(SQLString, connection))
{
try
{
if (TranFlag) cmd.Transaction = GetTran();
int rows = cmd.ExecuteNonQuery();
return rows;
}
catch (System.Data.OracleClient.OracleException E)
{
connection.Close();
throw new Exception(E.Message);
}
finally
{
cmd.Dispose();
if (!TranFlag) connection.Close();
}
}
}
#endregion #region 执行多条SQL语句，实现数据库事务
/// <summary>
/// 执行多条SQL语句，实现数据库事务。
/// </summary>
/// <param name="SQLStringList">多条SQL语句</param>
public static bool ExecuteSqlTran(ArrayList SQLStringList)
{
bool re = false;
using (OracleConnection connection = new OracleConnection(connectionString))
{
connection.Open();
OracleCommand cmd = new OracleCommand();
cmd.Connection = connection;
OracleTransaction tx = connection.BeginTransaction();
cmd.Transaction = tx;
try
{
for (int n = ; n < SQLStringList.Count; n++)
{
string strsql = SQLStringList[n].ToString();
if (strsql.Trim().Length > )
{
cmd.CommandText = strsql;
cmd.ExecuteNonQuery();
}
}
tx.Commit();
re = true;
}
catch (System.Data.OracleClient.OracleException E)
{
re = false;
tx.Rollback();
throw new Exception(E.Message);
}
finally
{
cmd.Dispose();
connection.Close();
}
}
return re; }
#endregion #region 执行带一个存储过程参数的的SQL语句
/// <summary>
/// 执行带一个存储过程参数的的SQL语句。
/// </summary>
/// <param name="SQLString">SQL语句</param>
/// <param name="content">参数内容,比如一个字段是格式复杂的文章，有特殊符号，可以通过这个方式添加</param>
/// <returns>影响的记录数</returns>
public static int ExecuteSql(string SQLString, string content)
{
using (OracleConnection connection = new OracleConnection(connectionString))
{
OracleCommand cmd = new OracleCommand(SQLString, connection);
System.Data.OracleClient.OracleParameter myParameter = new System.Data.OracleClient.OracleParameter("@content", OracleType.NVarChar);
myParameter.Value = content;
cmd.Parameters.Add(myParameter);
try
{
connection.Open();
int rows = cmd.ExecuteNonQuery();
return rows;
}
catch (System.Data.OracleClient.OracleException E)
{
throw new Exception(E.Message);
}
finally
{
cmd.Dispose();
connection.Close();
}
}
}
#endregion #region 向数据库里插入图像格式的字段
/// <summary>
/// 向数据库里插入图像格式的字段(和上面情况类似的另一种实例)
/// </summary>
/// <param name="strSQL">SQL语句</param>
/// <param name="fs">图像字节,数据库的字段类型为image的情况</param>
/// <returns>影响的记录数</returns>
public static int ExecuteSqlInsertImg(string strSQL, byte[] fs)
{
using (OracleConnection connection = new OracleConnection(connectionString))
{
OracleCommand cmd = new OracleCommand(strSQL, connection);
System.Data.OracleClient.OracleParameter myParameter = new System.Data.OracleClient.OracleParameter("@fs", OracleType.LongRaw);
myParameter.Value = fs;
cmd.Parameters.Add(myParameter);
try
{
connection.Open();
int rows = cmd.ExecuteNonQuery();
return rows;
}
catch (System.Data.OracleClient.OracleException E)
{
throw new Exception(E.Message);
}
finally
{
cmd.Dispose();
connection.Close();
}
}
}
#endregion #region 执行一条计算查询结果语句，返回查询结果
/// <summary>
/// 执行一条计算查询结果语句，返回查询结果（object）。
/// </summary>
/// <param name="SQLString">计算查询结果语句</param>
/// <returns>查询结果（object）</returns>
public static object GetSingle(string SQLString)
{
using (OracleConnection connection = new OracleConnection(connectionString))
{
using (OracleCommand cmd = new OracleCommand(SQLString, connection))
{
try
{
connection.Open();
object obj = cmd.ExecuteScalar();
if ((Object.Equals(obj, null)) || (Object.Equals(obj, System.DBNull.Value)))
{
return null;
}
else
{
return obj;
}
}
catch (System.Data.OracleClient.OracleException e)
{
connection.Close();
throw new Exception(e.Message);
}
finally
{
cmd.Dispose();
connection.Close();
}
}
}
}
#endregion #region 执行查询语句，返回OracleDataReader
/// <summary>
/// 执行查询语句，返回OracleDataReader ( 注意：调用该方法后，一定要对SqlDataReader进行Close )
/// </summary>
/// <param name="strSQL">查询语句</param>
/// <returns>OracleDataReader</returns>
public static OracleDataReader ExecuteReader(string strSQL)
{
OracleConnection connection = new OracleConnection(connectionString);
OracleCommand cmd = new OracleCommand(strSQL, connection);
try
{
connection.Open();
OracleDataReader myReader = cmd.ExecuteReader(CommandBehavior.CloseConnection);
return myReader;
}
catch (System.Data.OracleClient.OracleException e)
{
throw new Exception(e.Message);
} }
#endregion #region 执行查询语句，返回DataSet
/// <summary>
/// 执行查询语句，返回DataSet
/// </summary>
/// <param name="SQLString">查询语句</param>
/// <returns>DataSet</returns>
public static DataSet Query(string SQLString)
{
using (OracleConnection connection = new OracleConnection(connectionString))
{
DataSet ds = new DataSet();
try
{
connection.Open();
OracleDataAdapter command = new OracleDataAdapter(SQLString, connection);
command.Fill(ds, "ds");
}
catch (System.Data.OracleClient.OracleException ex)
{
throw new Exception(ex.Message);
}
finally
{
connection.Close();
}
return ds;
}
}
#endregion
#endregion #region 执行带参数的SQL语句
#region 执行SQL语句，返回影响的记录数
/// <summary>
/// 执行SQL语句，返回影响的记录数
/// </summary>
/// <param name="SQLString">SQL语句</param>
/// <returns>影响的记录数</returns>
public static int ExecuteSql(string SQLString, params OracleParameter[] cmdParms)
{
OracleConnection connection = GetOpenConnection();
using (OracleCommand cmd = new OracleCommand())
{
try
{
PrepareCommand(cmd, connection, null, SQLString, cmdParms);
if (TranFlag) cmd.Transaction = GetTran();
int rows = cmd.ExecuteNonQuery();
cmd.Parameters.Clear();
return rows;
}
catch (System.Data.OracleClient.OracleException E)
{
throw new Exception(E.Message);
}
finally
{
cmd.Dispose();
if (!TranFlag) connection.Close();
}
}
}
#endregion #region 执行多条SQL语句，实现数据库事务
/// <summary>
/// 执行多条SQL语句，实现数据库事务。
/// </summary>
/// <param name="SQLStringList">SQL语句的哈希表（key为sql语句，value是该语句的OracleParameter[]）</param>
public static void ExecuteSqlTran(Hashtable SQLStringList)
{
using (OracleConnection conn = new OracleConnection(connectionString))
{
conn.Open();
using (OracleTransaction trans = conn.BeginTransaction())
{
OracleCommand cmd = new OracleCommand();
try
{
//循环
foreach (DictionaryEntry myDE in SQLStringList)
{
string cmdText = myDE.Key.ToString();
OracleParameter[] cmdParms = (OracleParameter[])myDE.Value;
PrepareCommand(cmd, conn, trans, cmdText, cmdParms);
int val = cmd.ExecuteNonQuery();
cmd.Parameters.Clear(); trans.Commit();
}
}
catch
{
trans.Rollback();
throw;
}
}
}
}
#endregion #region 执行一条计算查询结果语句，返回查询结果
/// <summary>
/// 执行一条计算查询结果语句，返回查询结果（object）。
/// </summary>
/// <param name="SQLString">计算查询结果语句</param>
/// <returns>查询结果（object）</returns>
public static object GetSingle(string SQLString, params OracleParameter[] cmdParms)
{
using (OracleConnection connection = new OracleConnection(connectionString))
{
using (OracleCommand cmd = new OracleCommand())
{
try
{
PrepareCommand(cmd, connection, null, SQLString, cmdParms);
object obj = cmd.ExecuteScalar();
cmd.Parameters.Clear();
if ((Object.Equals(obj, null)) || (Object.Equals(obj, System.DBNull.Value)))
{
return null;
}
else
{
return obj;
}
}
catch (System.Data.OracleClient.OracleException e)
{
throw new Exception(e.Message);
}
finally
{
cmd.Dispose();
connection.Close();
}
}
}
}
#endregion #region 执行查询语句，返回OracleDataReader
/// <summary>
/// 执行查询语句，返回OracleDataReader ( 注意：调用该方法后，一定要对SqlDataReader进行Close )
/// </summary>
/// <param name="strSQL">查询语句</param>
/// <returns>OracleDataReader</returns>
public static OracleDataReader ExecuteReader(string SQLString, params OracleParameter[] cmdParms)
{
OracleConnection connection = new OracleConnection(connectionString);
OracleCommand cmd = new OracleCommand();
try
{
PrepareCommand(cmd, connection, null, SQLString, cmdParms);
OracleDataReader myReader = cmd.ExecuteReader(CommandBehavior.CloseConnection);
cmd.Parameters.Clear();
return myReader;
}
catch (System.Data.OracleClient.OracleException e)
{
throw new Exception(e.Message);
} }
#endregion #region 执行查询语句，返回DataSet
/// <summary>
/// 执行查询语句，返回DataSet
/// </summary>
/// <param name="SQLString">查询语句</param>
/// <returns>DataSet</returns>
public static DataSet Query(string SQLString, params OracleParameter[] cmdParms)
{
using (OracleConnection connection = new OracleConnection(connectionString))
{
OracleCommand cmd = new OracleCommand();
PrepareCommand(cmd, connection, null, SQLString, cmdParms);
using (OracleDataAdapter da = new OracleDataAdapter(cmd))
{
DataSet ds = new DataSet();
try
{
da.Fill(ds, "ds");
cmd.Parameters.Clear();
}
catch (System.Data.OracleClient.OracleException ex)
{
throw new Exception(ex.Message);
}
finally
{
cmd.Dispose();
connection.Close();
}
return ds;
}
}
}
#endregion #region PrepareCommand
private static void PrepareCommand(OracleCommand cmd, OracleConnection conn, OracleTransaction trans, string cmdText, OracleParameter[] cmdParms)
{
if (conn.State != ConnectionState.Open)
conn.Open();
cmd.Connection = conn;
cmd.CommandText = cmdText;
if (trans != null)
cmd.Transaction = trans;
cmd.CommandType = CommandType.Text;//cmdType;
if (cmdParms != null)
{
foreach (OracleParameter parm in cmdParms)
cmd.Parameters.Add(parm);
}
}
#endregion
#endregion #region 存储过程操作
#region 执行存储过程 返回SqlDataReader
/// <summary>
/// 执行存储过程 返回SqlDataReader ( 注意：调用该方法后，一定要对SqlDataReader进行Close )
/// </summary>
/// <param name="storedProcName">存储过程名</param>
/// <param name="parameters">存储过程参数</param>
/// <returns>OracleDataReader</returns>
public static OracleDataReader RunProcedureReader(string storedProcName, IDataParameter[] parameters)
{
OracleConnection connection = new OracleConnection(connectionString);
OracleDataReader returnReader;
connection.Open();
OracleCommand command = BuildQueryCommand(connection, storedProcName, parameters);
command.CommandType = CommandType.StoredProcedure;
returnReader = command.ExecuteReader(CommandBehavior.CloseConnection);
return returnReader;
}
#endregion #region 执行存储过程，返回影响的行数
/// <summary>
/// 执行存储过程，返回影响的行数
/// </summary>
/// <param name="storedProcName">存储过程名</param>
/// <param name="parameters">存储过程参数</param>
/// <param name="rowsAffected">影响的行数</param>
/// <returns></returns>
public static int RunProcedure(string storedProcName, IDataParameter[] parameters, out int rowsAffected)
{
using (OracleConnection connection = new OracleConnection(connectionString))
{
int result;
connection.Open();
OracleCommand command = BuildIntCommand(connection, storedProcName, parameters);
rowsAffected = command.ExecuteNonQuery();
result = (int)command.Parameters["ReturnValue"].Value;
//Connection.Close();
return result;
}
}
#endregion #region 执行存储过程，什么值也不返回
/// <summary>
/// 执行存储过程，什么值也不返回
/// </summary>
/// <param name="storedProcName"></param>
/// <param name="parameters"></param>
public static void RunProcedure(string storedProcName, OracleParameter[] parameters)
{
using (OracleConnection connection = new OracleConnection(connectionString))
{
System.Data.OracleClient.OracleCommand cmd = BuildQueryCommand(connection, storedProcName, parameters); try
{
if (connection.State != ConnectionState.Open)
{ connection.Open();
} cmd.ExecuteNonQuery(); }
catch (Exception ex)
{
ex.Message.ToString();
throw new Exception(ex.Message);
// Console.WriteLine(ex.Message.ToString());
}
finally
{
connection.Close(); }
}
}
#endregion #region 执行存储过程,返回数据集
/// <summary>
/// 执行存储过程,返回数据集
/// </summary>
/// <param name="storedProcName">存储过程名</param>
/// <param name="parameters">存储过程参数</param>
/// <param name="tableName">DataSet结果中的表名</param>
/// <returns>DataSet</returns>
public static DataSet RunProcedureGetDataSet(string storedProcName, OracleParameter[] parameters)
{
using (OracleConnection connection = new OracleConnection(connectionString))
{
DataSet dataSet = new DataSet();
connection.Open();
OracleDataAdapter sqlDA = new OracleDataAdapter();
sqlDA.SelectCommand = BuildQueryCommand(connection, storedProcName, parameters);
sqlDA.Fill(dataSet, "dt");
connection.Close();
return dataSet;
}
}
#endregion #region 构建 OracleCommand 对象
/// <summary>
/// 构建 OracleCommand 对象(用来返回一个结果集，而不是一个整数值)
/// </summary>
/// <param name="connection">数据库连接</param>
/// <param name="storedProcName">存储过程名</param>
/// <param name="parameters">存储过程参数</param>
/// <returns>OracleCommand</returns>
private static OracleCommand BuildQueryCommand(OracleConnection connection, string storedProcName, IDataParameter[] parameters)
{
OracleCommand command = new OracleCommand(storedProcName, connection);
command.CommandType = CommandType.StoredProcedure;
foreach (OracleParameter parameter in parameters)
{
command.Parameters.Add(parameter);
}
return command;
}
#endregion #region 执行存储过程，返回影响的行数
/// <summary>
/// 执行存储过程，返回影响的行数
/// </summary>
/// <param name="storedProcName">存储过程名</param>
/// <param name="parameters">存储过程参数</param>
/// <param name="rowsAffected">影响的行数</param>
/// <returns></returns>
public static int RunProcedure_rowsAffected(string storedProcName, IDataParameter[] parameters, out int rowsAffected)
{
using (OracleConnection connection = new OracleConnection(connectionString))
{
int result;
connection.Open();
OracleCommand command = BuildIntCommand(connection, storedProcName, parameters);
rowsAffected = command.ExecuteNonQuery();
result = (int)command.Parameters["ReturnValue"].Value;
//Connection.Close();
return result;
}
}
#endregion #region 创建 OracleCommand 对象实例
/// <summary>
/// 创建 OracleCommand 对象实例(用来返回一个整数值)
/// </summary>
/// <param name="storedProcName">存储过程名</param>
/// <param name="parameters">存储过程参数</param>
/// <returns>OracleCommand 对象实例</returns>
private static OracleCommand BuildIntCommand(OracleConnection connection, string storedProcName, IDataParameter[] parameters)
{
OracleCommand command = BuildQueryCommand(connection, storedProcName, parameters);
command.Parameters.Add(new OracleParameter("ReturnValue",
OracleType.Int32, , ParameterDirection.ReturnValue,
false, , , string.Empty, DataRowVersion.Default, null));
return command;
}
#endregion
#endregion
#endregion #region 扩展方法
#region 执行返回一行一列的数据库操作
/// <summary>
/// 执行返回一行一列的数据库操作
/// </summary>
/// <param name="commandText">Oracle语句或存储过程名</param>
/// <param name="commandType">Oracle命令类型</param>
/// <param name="param">Oracle命令参数数组</param>
/// <returns>第一行第一列的记录</returns>
public static int ExecuteScalar(string commandText, CommandType commandType, params OracleParameter[] param)
{
int count = ;
using (OracleConnection connection = new OracleConnection(connectionString))
{
using (OracleCommand cmd = new OracleCommand(commandText, connection))
{
try
{
cmd.CommandType = commandType;
cmd.Parameters.AddRange(param);
connection.Open();
count = Convert.ToInt32(cmd.ExecuteScalar());
}
catch (Exception ex)
{
count = ;
}
}
}
return count;
}
#endregion #region 执行不查询的数据库操作
/// <summary>
/// 执行不查询的数据库操作
/// </summary>
/// <param name="commandText">Oracle语句或存储过程名</param>
/// <param name="commandType">Oracle命令类型</param>
/// <param name="param">Oracle命令参数数组</param>
/// <returns>受影响的行数</returns>
public static int ExecuteNonQuery(string commandText, CommandType commandType, params OracleParameter[] param)
{
int result = ;
using (OracleConnection connection = new OracleConnection(connectionString))
{
using (OracleCommand cmd = new OracleCommand(commandText, connection))
{
try
{
cmd.CommandType = commandType;
cmd.Parameters.AddRange(param);
connection.Open();
result = cmd.ExecuteNonQuery();
}
catch (Exception ex)
{
result = ;
}
}
}
return result;
}
#endregion #region 执行返回一条记录的泛型对象
/// <summary>
/// 执行返回一条记录的泛型对象
/// </summary>
/// <typeparam name="T">泛型类型</typeparam>
/// <param name="reader">只进只读对象</param>
/// <returns>泛型对象</returns>
private static T ExecuteDataReader<T>(IDataReader reader)
{
T obj = default(T);
try
{
Type type = typeof(T);
obj = (T)Activator.CreateInstance(type);//从当前程序集里面通过反射的方式创建指定类型的对象
//obj = (T)Assembly.Load(OracleHelper._assemblyName).CreateInstance(OracleHelper._assemblyName + "." + type.Name);//从另一个程序集里面通过反射的方式创建指定类型的对象
PropertyInfo[] propertyInfos = type.GetProperties();//获取指定类型里面的所有属性
foreach (PropertyInfo propertyInfo in propertyInfos)
{
for (int i = ; i < reader.FieldCount; i++)
{
string fieldName = reader.GetName(i);
if (fieldName.ToLower() == propertyInfo.Name.ToLower())
{
object val = reader[propertyInfo.Name];//读取表中某一条记录里面的某一列信息
if (val != null && val != DBNull.Value)
propertyInfo.SetValue(obj, val, null);//给对象的某一个属性赋值
break;
}
}
}
}
catch (Exception ex)
{
}
return obj;
}
#endregion #region 执行返回一条记录的泛型对象
/// <summary>
/// 执行返回一条记录的泛型对象
/// </summary>
/// <typeparam name="T">泛型类型</typeparam>
/// <param name="commandText">Oracle语句或存储过程名</param>
/// <param name="commandType">Oracle命令类型</param>
/// <param name="param">Oracle命令参数数组</param>
/// <returns>实体对象</returns>
public static T ExecuteEntity<T>(string commandText, CommandType commandType, params OracleParameter[] param)
{
T obj = default(T);
using (OracleConnection connection = new OracleConnection(connectionString))
{
using (OracleCommand cmd = new OracleCommand(commandText, connection))
{
cmd.CommandType = commandType;
cmd.Parameters.AddRange(param);
connection.Open();
OracleDataReader reader = cmd.ExecuteReader(CommandBehavior.CloseConnection);
while (reader.Read())
{
obj = OracleHelper.ExecuteDataReader<T>(reader);
}
}
}
return obj;
}
#endregion #region 执行返回多条记录的泛型集合对象
/// <summary>
/// 执行返回多条记录的泛型集合对象
/// </summary>
/// <typeparam name="T">泛型类型</typeparam>
/// <param name="commandText">Oracle语句或存储过程名</param>
/// <param name="commandType">Oracle命令类型</param>
/// <param name="param">Oracle命令参数数组</param>
/// <returns>泛型集合对象</returns>
public static List<T> ExecuteList<T>(string commandText, CommandType commandType, params OracleParameter[] param)
{
List<T> list = new List<T>();
using (OracleConnection connection = new OracleConnection(connectionString))
{
using (OracleCommand cmd = new OracleCommand(commandText, connection))
{
try
{
cmd.CommandType = commandType;
cmd.Parameters.AddRange(param);
connection.Open();
OracleDataReader reader = cmd.ExecuteReader(CommandBehavior.CloseConnection);
while (reader.Read())
{
T obj = OracleHelper.ExecuteDataReader<T>(reader);
list.Add(obj);
}
}
catch (Exception ex)
{
list = null;
}
}
}
return list;
}
#endregion
#endregion #region 增删改查
#region 根据sequence名称获取下一个ID
/// <summary>
/// 根据sequence名称获取下一个ID
/// </summary>
public static int GetNextID(string sequenceName)
{
string sql = string.Format("select {0}.Nextval from dual", sequenceName);
DataTable dt = Query(sql).Tables[];
return int.Parse(dt.Rows[][].ToString());
}
#endregion #region 添加
/// <summary>
/// 添加
/// </summary>
public static void Insert(object obj)
{
StringBuilder strSql = new StringBuilder();
Type type = obj.GetType();
strSql.Append(string.Format("insert into {0}(", type.Name)); PropertyInfo[] propertyInfoList = type.GetProperties();
List<string> propertyNameList = new List<string>();
int savedCount = ;
foreach (PropertyInfo propertyInfo in propertyInfoList)
{
if (propertyInfo.GetCustomAttributes(typeof(NotSaveAttribute), false).Length == )
{
if (propertyInfo.GetCustomAttributes(typeof(IsEntityAttribute), false).Length == )
{
object val = propertyInfo.GetValue(obj, null);
if (val != null)
{
propertyNameList.Add(propertyInfo.Name);
savedCount++;
}
}
else
{
object val = propertyInfo.GetValue(obj, null);
if (val != null)
{
propertyNameList.Add(propertyInfo.Name + "Id");
savedCount++;
}
}
}
} strSql.Append(string.Format("{0})", string.Join(",", propertyNameList.ToArray())));
strSql.Append(string.Format(" values ({0})", string.Join(",", propertyNameList.ConvertAll<string>(a => ":" + a).ToArray())));
OracleParameter[] parameters = new OracleParameter[savedCount];
int i = ;
foreach (PropertyInfo propertyInfo in propertyInfoList)
{
if (propertyInfo.GetCustomAttributes(typeof(NotSaveAttribute), false).Length == )
{
if (propertyInfo.GetCustomAttributes(typeof(IsEntityAttribute), false).Length == )
{
object val = propertyInfo.GetValue(obj, null);
if (val != null)
{
OracleParameter oracleParameter = new OracleParameter(":" + propertyInfo.Name, propertyInfo.GetValue(obj, null));
parameters[i++] = oracleParameter;
}
}
else
{
object val = propertyInfo.GetValue(obj, null);
if (val != null)
{
object valProVal = val.GetType().GetProperty("Id").GetValue(val, null);
OracleParameter oracleParameter = new OracleParameter(":" + propertyInfo.Name + "Id", valProVal);
parameters[i++] = oracleParameter;
}
}
}
} ExecuteSql(strSql.ToString(), parameters);
}
#endregion #region 修改
/// <summary>
/// 修改
/// </summary>
public static void Update(object obj)
{
object oldObj = Find(obj);
if (oldObj == null) throw new Exception("无法获取到旧数据"); StringBuilder strSql = new StringBuilder();
Type type = obj.GetType();
strSql.Append(string.Format("update {0} ", type.Name)); PropertyInfo[] propertyInfoList = type.GetProperties();
List<string> propertyNameList = new List<string>();
int savedCount = ;
foreach (PropertyInfo propertyInfo in propertyInfoList)
{
if (propertyInfo.GetCustomAttributes(typeof(NotSaveAttribute), false).Length == )
{
if (propertyInfo.GetCustomAttributes(typeof(IsEntityAttribute), false).Length == )
{
object oldVal = propertyInfo.GetValue(oldObj, null);
object val = propertyInfo.GetValue(obj, null);
if (!object.Equals(oldVal, val))
{
propertyNameList.Add(propertyInfo.Name);
savedCount++;
}
}
else
{
object val = propertyInfo.GetValue(obj, null);
object oldVal = propertyInfo.GetValue(oldObj, null);
object oldValProVal = oldVal == null ? null : oldVal.GetType().GetProperty("Id").GetValue(oldVal, null);
object valProVal = val == null ? null : val.GetType().GetProperty("Id").GetValue(val, null);
if (!object.Equals(oldValProVal, valProVal))
{
propertyNameList.Add(propertyInfo.Name);
savedCount++;
}
}
}
} strSql.Append(string.Format(" set "));
OracleParameter[] parameters = new OracleParameter[savedCount];
int i = ;
StringBuilder sbPros = new StringBuilder();
foreach (PropertyInfo propertyInfo in propertyInfoList)
{
if (propertyInfo.GetCustomAttributes(typeof(NotSaveAttribute), false).Length == )
{
if (propertyInfo.GetCustomAttributes(typeof(IsEntityAttribute), false).Length == )
{
object oldVal = propertyInfo.GetValue(oldObj, null);
object val = propertyInfo.GetValue(obj, null);
if (!object.Equals(oldVal, val))
{
sbPros.Append(string.Format(" {0}=:{0},", propertyInfo.Name));
OracleParameter oracleParameter = new OracleParameter(":" + propertyInfo.Name, val == null ? DBNull.Value : val);
parameters[i++] = oracleParameter;
}
}
else
{
object oldVal = propertyInfo.GetValue(oldObj, null);
object val = propertyInfo.GetValue(obj, null);
object oldValProVal = oldVal == null ? null : oldVal.GetType().GetProperty("Id").GetValue(oldVal, null);
object valProVal = val == null ? null : val.GetType().GetProperty("Id").GetValue(val, null);
if (!object.Equals(oldValProVal, valProVal))
{
sbPros.Append(string.Format(" {0}=:{0},", propertyInfo.Name + "Id")); OracleParameter oracleParameter = new OracleParameter(":" + propertyInfo.Name + "Id", valProVal == null ? DBNull.Value : valProVal);
parameters[i++] = oracleParameter;
}
}
} if (propertyInfo.GetCustomAttributes(typeof(IsEntityAttribute), false).Length > )
{
object val = propertyInfo.GetValue(obj, null);
if (val != null && Find(val) != null)
{
Update(val);
}
}
}
if (sbPros.Length > )
{
strSql.Append(sbPros.ToString(, sbPros.Length - ));
}
strSql.Append(string.Format(" where Id={0}", int.Parse(type.GetProperty("Id").GetValue(obj, null).ToString()))); if (savedCount > )
{
ExecuteSql(strSql.ToString(), parameters);
}
}
#endregion #region 删除
/// <summary>
/// 根据Id删除
/// </summary>
public static void Delete<T>(int id)
{
Type type = typeof(T);
StringBuilder sbSql = new StringBuilder();
sbSql.Append(string.Format("delete from {0} where Id={1}", type.Name, id)); ExecuteSql(sbSql.ToString());
}
/// <summary>
/// 根据Id集合删除
/// </summary>
public static void BatchDelete<T>(string ids)
{
if (string.IsNullOrWhiteSpace(ids)) return; Type type = typeof(T);
StringBuilder sbSql = new StringBuilder();
sbSql.Append(string.Format("delete from {0} where Id in ({1})", type.Name, ids)); ExecuteSql(sbSql.ToString());
}
#endregion #region 获取实体
#region 根据实体获取实体
/// <summary>
/// 根据实体获取实体
/// </summary>
private static object Find(object obj)
{
Type type = obj.GetType(); object result = Activator.CreateInstance(type);
bool hasValue = false;
IDataReader rd = null; string sql = string.Format("select * from {0} where Id={1}", type.Name, type.GetProperty("Id").GetValue(obj, null)); try
{
rd = ExecuteReader(sql); PropertyInfo[] propertyInfoList = type.GetProperties(); int fcnt = rd.FieldCount;
List<string> fileds = new List<string>();
for (int i = ; i < fcnt; i++)
{
fileds.Add(rd.GetName(i).ToUpper());
} while (rd.Read())
{
hasValue = true;
IDataRecord record = rd; foreach (PropertyInfo pro in propertyInfoList)
{
if (pro.PropertyType.IsClass)
{
object[] objArray = pro.GetCustomAttributes(typeof(IsEntityAttribute), false);
if (objArray.Length > )
{
if (record[pro.Name + "Id"].GetType() == typeof(int))
{
pro.SetValue(result, record[pro.Name + "Id"] == DBNull.Value ? null : FindById(pro.PropertyType, (int)record[pro.Name + "Id"]), null);
}
if (record[pro.Name + "Id"].GetType() == typeof(decimal))
{
pro.SetValue(result, record[pro.Name + "Id"] == DBNull.Value ? null : FindById(pro.PropertyType, int.Parse(((decimal)record[pro.Name + "Id"]).ToString())), null);
}
continue;
}
} if (!fileds.Contains(pro.Name.ToUpper()) || record[pro.Name] == DBNull.Value)
{
continue;
} pro.SetValue(result, record[pro.Name] == DBNull.Value ? null : getReaderValue(record[pro.Name], pro.PropertyType), null);
}
}
}
catch (Exception ex)
{
throw ex;
}
finally
{
if (rd != null && !rd.IsClosed)
{
rd.Close();
rd.Dispose();
}
} if (hasValue)
{
return result;
}
else
{
return null;
}
}
#endregion #region 根据Id获取实体
/// <summary>
/// 根据Id获取实体
/// </summary>
private static object FindById(Type type, int id)
{
object result = Activator.CreateInstance(type);
IDataReader rd = null;
bool hasValue = false; string sql = string.Format("select * from {0} where Id={1}", type.Name, id); try
{
rd = ExecuteReader(sql); PropertyInfo[] propertyInfoList = type.GetProperties(); int fcnt = rd.FieldCount;
List<string> fileds = new List<string>();
for (int i = ; i < fcnt; i++)
{
fileds.Add(rd.GetName(i).ToUpper());
} while (rd.Read())
{
hasValue = true;
IDataRecord record = rd; foreach (PropertyInfo pro in propertyInfoList)
{
if (pro.PropertyType.IsClass)
{
object[] objArray = pro.GetCustomAttributes(typeof(IsEntityAttribute), false);
if (objArray.Length > )
{
if (record[pro.Name + "Id"].GetType() == typeof(int))
{
pro.SetValue(result, record[pro.Name + "Id"] == DBNull.Value ? null : FindById(pro.PropertyType, (int)record[pro.Name + "Id"]), null);
}
if (record[pro.Name + "Id"].GetType() == typeof(decimal))
{
pro.SetValue(result, record[pro.Name + "Id"] == DBNull.Value ? null : FindById(pro.PropertyType, int.Parse(((decimal)record[pro.Name + "Id"]).ToString())), null);
}
continue;
}
} if (!fileds.Contains(pro.Name.ToUpper()) || record[pro.Name] == DBNull.Value)
{
continue;
} pro.SetValue(result, record[pro.Name] == DBNull.Value ? null : getReaderValue(record[pro.Name], pro.PropertyType), null);
}
}
}
catch (Exception ex)
{
throw ex;
}
finally
{
if (rd != null && !rd.IsClosed)
{
rd.Close();
rd.Dispose();
}
} if (hasValue)
{
return result;
}
else
{
return null;
}
}
#endregion #region 根据Id获取实体
/// <summary>
/// 根据Id获取实体
/// </summary>
public static T FindById<T>(int id) where T : new()
{
Type type = typeof(T);
T result = (T)Activator.CreateInstance(type);
IDataReader rd = null;
bool hasValue = false; string sql = string.Format("select * from {0} where Id={1}", type.Name, id); try
{
rd = ExecuteReader(sql); PropertyInfo[] propertyInfoList = type.GetProperties(); int fcnt = rd.FieldCount;
List<string> fileds = new List<string>();
for (int i = ; i < fcnt; i++)
{
fileds.Add(rd.GetName(i).ToUpper());
} while (rd.Read())
{
hasValue = true;
IDataRecord record = rd; foreach (PropertyInfo pro in propertyInfoList)
{
if (pro.PropertyType.IsClass)
{
object[] objArray = pro.GetCustomAttributes(typeof(IsEntityAttribute), false);
if (objArray.Length > )
{
if (record[pro.Name + "Id"].GetType() == typeof(int))
{
pro.SetValue(result, record[pro.Name + "Id"] == DBNull.Value ? null : FindById(pro.PropertyType, (int)record[pro.Name + "Id"]), null);
}
if (record[pro.Name + "Id"].GetType() == typeof(decimal))
{
pro.SetValue(result, record[pro.Name + "Id"] == DBNull.Value ? null : FindById(pro.PropertyType, int.Parse(((decimal)record[pro.Name + "Id"]).ToString())), null);
}
continue;
}
} if (!fileds.Contains(pro.Name.ToUpper()) || record[pro.Name] == DBNull.Value)
{
continue;
} pro.SetValue(result, record[pro.Name] == DBNull.Value ? null : getReaderValue(record[pro.Name], pro.PropertyType), null);
}
}
}
catch (Exception ex)
{
throw ex;
}
finally
{
if (rd != null && !rd.IsClosed)
{
rd.Close();
rd.Dispose();
}
} if (hasValue)
{
return result;
}
else
{
return default(T);
}
}
#endregion
#endregion #region 获取列表
/// <summary>
/// 获取列表
/// </summary>
public static List<T> FindListBySql<T>(string sql) where T : new()
{
List<T> list = new List<T>();
object obj;
IDataReader rd = null; try
{
rd = ExecuteReader(sql); if (typeof(T) == typeof(int))
{
while (rd.Read())
{
list.Add((T)rd[]);
}
}
else if (typeof(T) == typeof(string))
{
while (rd.Read())
{
list.Add((T)rd[]);
}
}
else
{
PropertyInfo[] propertyInfoList = (typeof(T)).GetProperties(); int fcnt = rd.FieldCount;
List<string> fileds = new List<string>();
for (int i = ; i < fcnt; i++)
{
fileds.Add(rd.GetName(i).ToUpper());
} while (rd.Read())
{
IDataRecord record = rd;
obj = new T(); foreach (PropertyInfo pro in propertyInfoList)
{
if (pro.PropertyType.IsClass)
{
if (pro.GetCustomAttributes(typeof(IsEntityAttribute), false).Length > )
{
if (record[pro.Name + "Id"].GetType() == typeof(int))
{
pro.SetValue(obj, record[pro.Name + "Id"] == DBNull.Value ? null : FindById(pro.PropertyType, (int)record[pro.Name + "Id"]), null);
}
if (record[pro.Name + "Id"].GetType() == typeof(decimal))
{
pro.SetValue(obj, record[pro.Name + "Id"] == DBNull.Value ? null : FindById(pro.PropertyType, int.Parse(((decimal)record[pro.Name + "Id"]).ToString())), null);
}
continue;
}
} if (!fileds.Contains(pro.Name.ToUpper()) || record[pro.Name] == DBNull.Value)
{
continue;
} pro.SetValue(obj, record[pro.Name] == DBNull.Value ? null : getReaderValue(record[pro.Name], pro.PropertyType), null);
}
list.Add((T)obj);
}
}
}
catch (Exception ex)
{
throw ex;
}
finally
{
if (rd != null && !rd.IsClosed)
{
rd.Close();
rd.Dispose();
}
} return list;
}
#endregion #region 分页获取列表
/// <summary>
/// 分页(任意entity，尽量少的字段)
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="sql"></param>
/// <returns></returns>
public static PageViewModel FindPageBySql<T>(string sql, string orderby, int pageSize, int currentPage) where T : new()
{
PageViewModel pageViewModel = new PageViewModel(); using (OracleConnection connection = new OracleConnection(connectionString))
{
connection.Open();
string commandText = string.Format("select count(*) from ({0}) T", sql);
IDbCommand cmd = new OracleCommand(commandText, connection);
pageViewModel.total = int.Parse(cmd.ExecuteScalar().ToString()); int startRow = pageSize * (currentPage - );
int endRow = startRow + pageSize; StringBuilder sb = new StringBuilder();
sb.Append("select * from ( select row_limit.*, rownum rownum_ from (");
sb.Append(sql);
if (!string.IsNullOrWhiteSpace(orderby))
{
sb.Append(" ");
sb.Append(orderby);
}
sb.Append(" ) row_limit where rownum <= ");
sb.Append(endRow);
sb.Append(" ) where rownum_ >");
sb.Append(startRow); List<T> list = FindListBySql<T>(sb.ToString());
pageViewModel.rows = list;
} return pageViewModel;
}
#endregion #region getReaderValue 转换数据
/// <summary>
/// 转换数据
/// </summary>
private static Object getReaderValue(Object rdValue, Type ptype)
{ if (ptype == typeof(decimal))
return Convert.ToDecimal(rdValue); if (ptype == typeof(int))
return Convert.ToInt32(rdValue); if (ptype == typeof(long))
return Convert.ToInt64(rdValue); return rdValue;
}
#endregion
#endregion #region 事务
#region 开始事务
/// <summary>
/// 开始事务
/// </summary>
public static void BeginTransaction()
{
GetTran();
AddTranFlag();
}
#endregion #region 结束事务(正常结束)
/// <summary>
/// 结束事务(正常结束)
/// </summary>
public static void EndTransaction()
{
try
{
GetTran().Commit();
RemoveTranFlag();
}
catch (Exception ex)
{
GetTran().Rollback();
RemoveTranFlag();
}
finally
{
GetOpenConnection().Close();
}
}
#endregion #region 回滚事务(出错时调用该方法回滚)
/// <summary>
/// 回滚事务(出错时调用该方法回滚)
/// </summary>
public static void RollbackTransaction()
{
GetTran().Rollback();
RemoveTranFlag();
GetOpenConnection().Close();
}
#endregion
#endregion }
}
OracleHelper.cs(扩展修改版(扩展了几个查询方法；修改了Update方法，原方法要求实体的主键必须是Id，新方法没有此要求，但主键要加上IsId特性))：
using System;
using System.Collections;
using System.Collections.Generic;
using System.Configuration;
using System.Data;
using System.Data.OracleClient;
using System.Linq;
using System.Reflection;
using System.Text;
using System.Xml.Linq;
using Models;
using System.Web; namespace DBUtil
{
/// <summary>
/// Oracle操作类
/// 2014年9月25日
/// 写程序之前，首先引用System.Data.OracleClient
/// </summary>
public class OracleHelper
{
#region 变量
/// <summary>
/// 数据库连接字符串
/// </summary>
public static string connectionString = ConfigurationManager.ConnectionStrings["DefaultConnection"].ToString();
#endregion #region 事务的OracleConnection
#region 数据库连接对象
/// <summary>
/// 获取打开的数据库连接对象
/// </summary>
public static OracleConnection GetOpenConnection()
{
OracleConnection connection = null; string key = "Simpo_FQD_OracleConnection"; if (HttpContext.Current.Items[key] == null)
{
connection = new OracleConnection(connectionString);
connection.Open();
HttpContext.Current.Items[key] = connection;
}
else
{
connection = (OracleConnection)HttpContext.Current.Items[key];
} return connection;
}
#endregion #region 事务对象
/// <summary>
/// 获取事务对象
/// </summary>
public static OracleTransaction GetTran()
{
OracleTransaction tran = null; string key = "Simpo_FQD_OracleTransaction"; if (HttpContext.Current.Items[key] == null)
{
tran = GetOpenConnection().BeginTransaction();
HttpContext.Current.Items[key] = tran;
}
else
{
tran = (OracleTransaction)HttpContext.Current.Items[key];
} return tran;
}
#endregion #region 开起事务标志
/// <summary>
/// 事务标志
/// </summary>
private static string tranFlagKey = "Simpo_FQD_OracleTransaction_Flag";
/// <summary>
/// 添加事务标志
/// </summary>
public static void AddTranFlag()
{
HttpContext.Current.Items[tranFlagKey] = true;
}
/// <summary>
/// 移除事务标志
/// </summary>
public static void RemoveTranFlag()
{
HttpContext.Current.Items[tranFlagKey] = false;
}
/// <summary>
/// 事务标志
/// </summary>
public static bool TranFlag
{
get
{
bool tranFlag = false; if (HttpContext.Current.Items[tranFlagKey] != null)
{
tranFlag = (bool)HttpContext.Current.Items[tranFlagKey];
} return tranFlag;
}
}
#endregion
#endregion #region 基础方法
#region 公用方法
#region GetMaxID
/// <summary>
/// 不支持多用户并发，慎用，请使用GetNextID方法
/// </summary>
private static int GetMaxID(string fieldName, string tableName)
{
string strsql = "select max(" + fieldName + ")+1 from " + tableName;
object obj = OracleHelper.GetSingle(strsql);
if (obj == null)
{
return ;
}
else
{
return int.Parse(obj.ToString());
}
}
#endregion #region Exists
public static bool Exists(string strSql, params OracleParameter[] cmdParms)
{
object obj = OracleHelper.GetSingle(strSql, cmdParms);
int cmdresult;
if ((Object.Equals(obj, null)) || (Object.Equals(obj, System.DBNull.Value)))
{
cmdresult = ;
}
else
{
cmdresult = int.Parse(obj.ToString());
}
if (cmdresult == )
{
return false;
}
else
{
return true;
}
}
#endregion
#endregion #region 执行简单SQL语句
#region Exists
public static bool Exists(string SQLString)
{
using (OracleConnection connection = new OracleConnection(connectionString))
{
using (OracleCommand cmd = new OracleCommand(SQLString, connection))
{
try
{
connection.Open();
object obj = cmd.ExecuteScalar();
if ((Object.Equals(obj, null)) || (Object.Equals(obj, System.DBNull.Value)))
{
return false;
}
else
{
return true;
}
}
catch (System.Data.OracleClient.OracleException e)
{
connection.Close();
throw new Exception(e.Message);
}
finally
{
cmd.Dispose();
connection.Close();
}
}
}
}
#endregion #region 执行SQL语句，返回影响的记录数
/// <summary>
/// 执行SQL语句，返回影响的记录数
/// </summary>
/// <param name="SQLString">SQL语句</param>
/// <returns>影响的记录数</returns>
public static int ExecuteSql(string SQLString)
{
OracleConnection connection = GetOpenConnection();
using (OracleCommand cmd = new OracleCommand(SQLString, connection))
{
try
{
if (TranFlag) cmd.Transaction = GetTran();
int rows = cmd.ExecuteNonQuery();
return rows;
}
catch (System.Data.OracleClient.OracleException E)
{
connection.Close();
throw new Exception(E.Message);
}
finally
{
cmd.Dispose();
if (!TranFlag) connection.Close();
}
}
}
#endregion #region 执行多条SQL语句，实现数据库事务
/// <summary>
/// 执行多条SQL语句，实现数据库事务。
/// </summary>
/// <param name="SQLStringList">多条SQL语句</param>
public static bool ExecuteSqlTran(ArrayList SQLStringList)
{
bool re = false;
using (OracleConnection connection = new OracleConnection(connectionString))
{
connection.Open();
OracleCommand cmd = new OracleCommand();
cmd.Connection = connection;
OracleTransaction tx = connection.BeginTransaction();
cmd.Transaction = tx;
try
{
for (int n = ; n < SQLStringList.Count; n++)
{
string strsql = SQLStringList[n].ToString();
if (strsql.Trim().Length > )
{
cmd.CommandText = strsql;
cmd.ExecuteNonQuery();
}
}
tx.Commit();
re = true;
}
catch (System.Data.OracleClient.OracleException E)
{
re = false;
tx.Rollback();
throw new Exception(E.Message);
}
finally
{
cmd.Dispose();
connection.Close();
}
}
return re; }
#endregion #region 执行带一个存储过程参数的的SQL语句
/// <summary>
/// 执行带一个存储过程参数的的SQL语句。
/// </summary>
/// <param name="SQLString">SQL语句</param>
/// <param name="content">参数内容,比如一个字段是格式复杂的文章，有特殊符号，可以通过这个方式添加</param>
/// <returns>影响的记录数</returns>
public static int ExecuteSql(string SQLString, string content)
{
using (OracleConnection connection = new OracleConnection(connectionString))
{
OracleCommand cmd = new OracleCommand(SQLString, connection);
System.Data.OracleClient.OracleParameter myParameter = new System.Data.OracleClient.OracleParameter("@content", OracleType.NVarChar);
myParameter.Value = content;
cmd.Parameters.Add(myParameter);
try
{
connection.Open();
int rows = cmd.ExecuteNonQuery();
return rows;
}
catch (System.Data.OracleClient.OracleException E)
{
throw new Exception(E.Message);
}
finally
{
cmd.Dispose();
connection.Close();
}
}
}
#endregion #region 向数据库里插入图像格式的字段
/// <summary>
/// 向数据库里插入图像格式的字段(和上面情况类似的另一种实例)
/// </summary>
/// <param name="strSQL">SQL语句</param>
/// <param name="fs">图像字节,数据库的字段类型为image的情况</param>
/// <returns>影响的记录数</returns>
public static int ExecuteSqlInsertImg(string strSQL, byte[] fs)
{
using (OracleConnection connection = new OracleConnection(connectionString))
{
OracleCommand cmd = new OracleCommand(strSQL, connection);
System.Data.OracleClient.OracleParameter myParameter = new System.Data.OracleClient.OracleParameter("@fs", OracleType.LongRaw);
myParameter.Value = fs;
cmd.Parameters.Add(myParameter);
try
{
connection.Open();
int rows = cmd.ExecuteNonQuery();
return rows;
}
catch (System.Data.OracleClient.OracleException E)
{
throw new Exception(E.Message);
}
finally
{
cmd.Dispose();
connection.Close();
}
}
}
#endregion #region 执行一条计算查询结果语句，返回查询结果
/// <summary>
/// 执行一条计算查询结果语句，返回查询结果（object）。
/// </summary>
/// <param name="SQLString">计算查询结果语句</param>
/// <returns>查询结果（object）</returns>
public static object GetSingle(string SQLString)
{
using (OracleConnection connection = new OracleConnection(connectionString))
{
using (OracleCommand cmd = new OracleCommand(SQLString, connection))
{
try
{
connection.Open();
object obj = cmd.ExecuteScalar();
if ((Object.Equals(obj, null)) || (Object.Equals(obj, System.DBNull.Value)))
{
return null;
}
else
{
return obj;
}
}
catch (System.Data.OracleClient.OracleException e)
{
connection.Close();
throw new Exception(e.Message);
}
finally
{
cmd.Dispose();
connection.Close();
}
}
}
}
#endregion #region 执行查询语句，返回OracleDataReader
/// <summary>
/// 执行查询语句，返回OracleDataReader ( 注意：调用该方法后，一定要对SqlDataReader进行Close )
/// </summary>
/// <param name="strSQL">查询语句</param>
/// <returns>OracleDataReader</returns>
public static OracleDataReader ExecuteReader(string strSQL)
{
OracleConnection connection = new OracleConnection(connectionString);
OracleCommand cmd = new OracleCommand(strSQL, connection);
try
{
connection.Open();
OracleDataReader myReader = cmd.ExecuteReader(CommandBehavior.CloseConnection);
return myReader;
}
catch (System.Data.OracleClient.OracleException e)
{
throw new Exception(e.Message);
} }
#endregion #region 执行查询语句，返回DataSet
/// <summary>
/// 执行查询语句，返回DataSet
/// </summary>
/// <param name="SQLString">查询语句</param>
/// <returns>DataSet</returns>
public static DataSet Query(string SQLString)
{
using (OracleConnection connection = new OracleConnection(connectionString))
{
DataSet ds = new DataSet();
try
{
connection.Open();
OracleDataAdapter command = new OracleDataAdapter(SQLString, connection);
command.Fill(ds, "ds");
}
catch (System.Data.OracleClient.OracleException ex)
{
throw new Exception(ex.Message);
}
finally
{
connection.Close();
}
return ds;
}
}
#endregion
#endregion #region 执行带参数的SQL语句
#region 执行SQL语句，返回影响的记录数
/// <summary>
/// 执行SQL语句，返回影响的记录数
/// </summary>
/// <param name="SQLString">SQL语句</param>
/// <returns>影响的记录数</returns>
public static int ExecuteSql(string SQLString, params OracleParameter[] cmdParms)
{
OracleConnection connection = GetOpenConnection();
using (OracleCommand cmd = new OracleCommand())
{
try
{
PrepareCommand(cmd, connection, null, SQLString, cmdParms);
if (TranFlag) cmd.Transaction = GetTran();
int rows = cmd.ExecuteNonQuery();
cmd.Parameters.Clear();
return rows;
}
catch (System.Data.OracleClient.OracleException E)
{
throw new Exception(E.Message);
}
finally
{
cmd.Dispose();
if (!TranFlag) connection.Close();
}
}
}
#endregion #region 执行多条SQL语句，实现数据库事务
/// <summary>
/// 执行多条SQL语句，实现数据库事务。
/// </summary>
/// <param name="SQLStringList">SQL语句的哈希表（key为sql语句，value是该语句的OracleParameter[]）</param>
public static void ExecuteSqlTran(Hashtable SQLStringList)
{
using (OracleConnection conn = new OracleConnection(connectionString))
{
conn.Open();
using (OracleTransaction trans = conn.BeginTransaction())
{
OracleCommand cmd = new OracleCommand();
try
{
//循环
foreach (DictionaryEntry myDE in SQLStringList)
{
string cmdText = myDE.Key.ToString();
OracleParameter[] cmdParms = (OracleParameter[])myDE.Value;
PrepareCommand(cmd, conn, trans, cmdText, cmdParms);
int val = cmd.ExecuteNonQuery();
cmd.Parameters.Clear(); trans.Commit();
}
}
catch
{
trans.Rollback();
throw;
}
}
}
}
#endregion #region 执行一条计算查询结果语句，返回查询结果
/// <summary>
/// 执行一条计算查询结果语句，返回查询结果（object）。
/// </summary>
/// <param name="SQLString">计算查询结果语句</param>
/// <returns>查询结果（object）</returns>
public static object GetSingle(string SQLString, params OracleParameter[] cmdParms)
{
using (OracleConnection connection = new OracleConnection(connectionString))
{
using (OracleCommand cmd = new OracleCommand())
{
try
{
PrepareCommand(cmd, connection, null, SQLString, cmdParms);
object obj = cmd.ExecuteScalar();
cmd.Parameters.Clear();
if ((Object.Equals(obj, null)) || (Object.Equals(obj, System.DBNull.Value)))
{
return null;
}
else
{
return obj;
}
}
catch (System.Data.OracleClient.OracleException e)
{
throw new Exception(e.Message);
}
finally
{
cmd.Dispose();
connection.Close();
}
}
}
}
#endregion #region 执行查询语句，返回OracleDataReader
/// <summary>
/// 执行查询语句，返回OracleDataReader ( 注意：调用该方法后，一定要对SqlDataReader进行Close )
/// </summary>
/// <param name="strSQL">查询语句</param>
/// <returns>OracleDataReader</returns>
public static OracleDataReader ExecuteReader(string SQLString, params OracleParameter[] cmdParms)
{
OracleConnection connection = new OracleConnection(connectionString);
OracleCommand cmd = new OracleCommand();
try
{
PrepareCommand(cmd, connection, null, SQLString, cmdParms);
OracleDataReader myReader = cmd.ExecuteReader(CommandBehavior.CloseConnection);
cmd.Parameters.Clear();
return myReader;
}
catch (System.Data.OracleClient.OracleException e)
{
throw new Exception(e.Message);
} }
#endregion #region 执行查询语句，返回DataSet
/// <summary>
/// 执行查询语句，返回DataSet
/// </summary>
/// <param name="SQLString">查询语句</param>
/// <returns>DataSet</returns>
public static DataSet Query(string SQLString, params OracleParameter[] cmdParms)
{
using (OracleConnection connection = new OracleConnection(connectionString))
{
OracleCommand cmd = new OracleCommand();
PrepareCommand(cmd, connection, null, SQLString, cmdParms);
using (OracleDataAdapter da = new OracleDataAdapter(cmd))
{
DataSet ds = new DataSet();
try
{
da.Fill(ds, "ds");
cmd.Parameters.Clear();
}
catch (System.Data.OracleClient.OracleException ex)
{
throw new Exception(ex.Message);
}
finally
{
cmd.Dispose();
connection.Close();
}
return ds;
}
}
}
#endregion #region PrepareCommand
private static void PrepareCommand(OracleCommand cmd, OracleConnection conn, OracleTransaction trans, string cmdText, OracleParameter[] cmdParms)
{
if (conn.State != ConnectionState.Open)
conn.Open();
cmd.Connection = conn;
cmd.CommandText = cmdText;
if (trans != null)
cmd.Transaction = trans;
cmd.CommandType = CommandType.Text;//cmdType;
if (cmdParms != null)
{
foreach (OracleParameter parm in cmdParms)
cmd.Parameters.Add(parm);
}
}
#endregion
#endregion #region 存储过程操作
#region 执行存储过程 返回SqlDataReader
/// <summary>
/// 执行存储过程 返回SqlDataReader ( 注意：调用该方法后，一定要对SqlDataReader进行Close )
/// </summary>
/// <param name="storedProcName">存储过程名</param>
/// <param name="parameters">存储过程参数</param>
/// <returns>OracleDataReader</returns>
public static OracleDataReader RunProcedureReader(string storedProcName, IDataParameter[] parameters)
{
OracleConnection connection = new OracleConnection(connectionString);
OracleDataReader returnReader;
connection.Open();
OracleCommand command = BuildQueryCommand(connection, storedProcName, parameters);
command.CommandType = CommandType.StoredProcedure;
returnReader = command.ExecuteReader(CommandBehavior.CloseConnection);
return returnReader;
}
#endregion #region 执行存储过程，返回影响的行数
/// <summary>
/// 执行存储过程，返回影响的行数
/// </summary>
/// <param name="storedProcName">存储过程名</param>
/// <param name="parameters">存储过程参数</param>
/// <param name="rowsAffected">影响的行数</param>
/// <returns></returns>
public static int RunProcedure(string storedProcName, IDataParameter[] parameters, out int rowsAffected)
{
using (OracleConnection connection = new OracleConnection(connectionString))
{
int result;
connection.Open();
OracleCommand command = BuildIntCommand(connection, storedProcName, parameters);
rowsAffected = command.ExecuteNonQuery();
result = (int)command.Parameters["ReturnValue"].Value;
//Connection.Close();
return result;
}
}
#endregion #region 执行存储过程，什么值也不返回
/// <summary>
/// 执行存储过程，什么值也不返回
/// </summary>
/// <param name="storedProcName"></param>
/// <param name="parameters"></param>
public static void RunProcedure(string storedProcName, OracleParameter[] parameters)
{
using (OracleConnection connection = new OracleConnection(connectionString))
{
System.Data.OracleClient.OracleCommand cmd = BuildQueryCommand(connection, storedProcName, parameters); try
{
if (connection.State != ConnectionState.Open)
{ connection.Open();
} cmd.ExecuteNonQuery(); }
catch (Exception ex)
{
ex.Message.ToString();
throw new Exception(ex.Message);
// Console.WriteLine(ex.Message.ToString());
}
finally
{
connection.Close(); }
}
}
#endregion #region 执行存储过程,返回数据集
/// <summary>
/// 执行存储过程,返回数据集
/// </summary>
/// <param name="storedProcName">存储过程名</param>
/// <param name="parameters">存储过程参数</param>
/// <param name="tableName">DataSet结果中的表名</param>
/// <returns>DataSet</returns>
public static DataSet RunProcedureGetDataSet(string storedProcName, OracleParameter[] parameters)
{
using (OracleConnection connection = new OracleConnection(connectionString))
{
DataSet dataSet = new DataSet();
connection.Open();
OracleDataAdapter sqlDA = new OracleDataAdapter();
sqlDA.SelectCommand = BuildQueryCommand(connection, storedProcName, parameters);
sqlDA.Fill(dataSet, "dt");
connection.Close();
return dataSet;
}
}
#endregion #region 构建 OracleCommand 对象
/// <summary>
/// 构建 OracleCommand 对象(用来返回一个结果集，而不是一个整数值)
/// </summary>
/// <param name="connection">数据库连接</param>
/// <param name="storedProcName">存储过程名</param>
/// <param name="parameters">存储过程参数</param>
/// <returns>OracleCommand</returns>
private static OracleCommand BuildQueryCommand(OracleConnection connection, string storedProcName, IDataParameter[] parameters)
{
OracleCommand command = new OracleCommand(storedProcName, connection);
command.CommandType = CommandType.StoredProcedure;
foreach (OracleParameter parameter in parameters)
{
command.Parameters.Add(parameter);
}
return command;
}
#endregion #region 执行存储过程，返回影响的行数
/// <summary>
/// 执行存储过程，返回影响的行数
/// </summary>
/// <param name="storedProcName">存储过程名</param>
/// <param name="parameters">存储过程参数</param>
/// <param name="rowsAffected">影响的行数</param>
/// <returns></returns>
public static int RunProcedure_rowsAffected(string storedProcName, IDataParameter[] parameters, out int rowsAffected)
{
using (OracleConnection connection = new OracleConnection(connectionString))
{
int result;
connection.Open();
OracleCommand command = BuildIntCommand(connection, storedProcName, parameters);
rowsAffected = command.ExecuteNonQuery();
result = (int)command.Parameters["ReturnValue"].Value;
//Connection.Close();
return result;
}
}
#endregion #region 创建 OracleCommand 对象实例
/// <summary>
/// 创建 OracleCommand 对象实例(用来返回一个整数值)
/// </summary>
/// <param name="storedProcName">存储过程名</param>
/// <param name="parameters">存储过程参数</param>
/// <returns>OracleCommand 对象实例</returns>
private static OracleCommand BuildIntCommand(OracleConnection connection, string storedProcName, IDataParameter[] parameters)
{
OracleCommand command = BuildQueryCommand(connection, storedProcName, parameters);
command.Parameters.Add(new OracleParameter("ReturnValue",
OracleType.Int32, , ParameterDirection.ReturnValue,
false, , , string.Empty, DataRowVersion.Default, null));
return command;
}
#endregion
#endregion
#endregion #region 扩展方法
#region 执行返回一行一列的数据库操作
/// <summary>
/// 执行返回一行一列的数据库操作
/// </summary>
/// <param name="commandText">Oracle语句或存储过程名</param>
/// <param name="commandType">Oracle命令类型</param>
/// <param name="param">Oracle命令参数数组</param>
/// <returns>第一行第一列的记录</returns>
public static int ExecuteScalar(string commandText, CommandType commandType, params OracleParameter[] param)
{
int count = ;
using (OracleConnection connection = new OracleConnection(connectionString))
{
using (OracleCommand cmd = new OracleCommand(commandText, connection))
{
try
{
cmd.CommandType = commandType;
cmd.Parameters.AddRange(param);
connection.Open();
count = Convert.ToInt32(cmd.ExecuteScalar());
}
catch (Exception ex)
{
count = ;
}
}
}
return count;
}
#endregion #region 执行不查询的数据库操作
/// <summary>
/// 执行不查询的数据库操作
/// </summary>
/// <param name="commandText">Oracle语句或存储过程名</param>
/// <param name="commandType">Oracle命令类型</param>
/// <param name="param">Oracle命令参数数组</param>
/// <returns>受影响的行数</returns>
public static int ExecuteNonQuery(string commandText, CommandType commandType, params OracleParameter[] param)
{
int result = ;
using (OracleConnection connection = new OracleConnection(connectionString))
{
using (OracleCommand cmd = new OracleCommand(commandText, connection))
{
try
{
cmd.CommandType = commandType;
cmd.Parameters.AddRange(param);
connection.Open();
result = cmd.ExecuteNonQuery();
}
catch (Exception ex)
{
result = ;
}
}
}
return result;
}
#endregion #region 执行返回一条记录的泛型对象
/// <summary>
/// 执行返回一条记录的泛型对象
/// </summary>
/// <typeparam name="T">泛型类型</typeparam>
/// <param name="reader">只进只读对象</param>
/// <returns>泛型对象</returns>
private static T ExecuteDataReader<T>(IDataReader reader)
{
T obj = default(T);
try
{
Type type = typeof(T);
obj = (T)Activator.CreateInstance(type);//从当前程序集里面通过反射的方式创建指定类型的对象
//obj = (T)Assembly.Load(OracleHelper._assemblyName).CreateInstance(OracleHelper._assemblyName + "." + type.Name);//从另一个程序集里面通过反射的方式创建指定类型的对象
PropertyInfo[] propertyInfos = type.GetProperties();//获取指定类型里面的所有属性
foreach (PropertyInfo propertyInfo in propertyInfos)
{
for (int i = ; i < reader.FieldCount; i++)
{
string fieldName = reader.GetName(i);
if (fieldName.ToLower() == propertyInfo.Name.ToLower())
{
object val = reader[propertyInfo.Name];//读取表中某一条记录里面的某一列信息
if (val != null && val != DBNull.Value)
propertyInfo.SetValue(obj, val, null);//给对象的某一个属性赋值
break;
}
}
}
}
catch (Exception ex)
{
}
return obj;
}
#endregion #region 执行返回一条记录的泛型对象
/// <summary>
/// 执行返回一条记录的泛型对象
/// </summary>
/// <typeparam name="T">泛型类型</typeparam>
/// <param name="commandText">Oracle语句或存储过程名</param>
/// <param name="commandType">Oracle命令类型</param>
/// <param name="param">Oracle命令参数数组</param>
/// <returns>实体对象</returns>
public static T ExecuteEntity<T>(string commandText, CommandType commandType, params OracleParameter[] param)
{
T obj = default(T);
using (OracleConnection connection = new OracleConnection(connectionString))
{
using (OracleCommand cmd = new OracleCommand(commandText, connection))
{
cmd.CommandType = commandType;
cmd.Parameters.AddRange(param);
connection.Open();
OracleDataReader reader = cmd.ExecuteReader(CommandBehavior.CloseConnection);
while (reader.Read())
{
obj = OracleHelper.ExecuteDataReader<T>(reader);
}
}
}
return obj;
}
#endregion #region 执行返回多条记录的泛型集合对象
/// <summary>
/// 执行返回多条记录的泛型集合对象
/// </summary>
/// <typeparam name="T">泛型类型</typeparam>
/// <param name="commandText">Oracle语句或存储过程名</param>
/// <param name="commandType">Oracle命令类型</param>
/// <param name="param">Oracle命令参数数组</param>
/// <returns>泛型集合对象</returns>
public static List<T> ExecuteList<T>(string commandText, CommandType commandType, params OracleParameter[] param)
{
List<T> list = new List<T>();
using (OracleConnection connection = new OracleConnection(connectionString))
{
using (OracleCommand cmd = new OracleCommand(commandText, connection))
{
try
{
cmd.CommandType = commandType;
cmd.Parameters.AddRange(param);
connection.Open();
OracleDataReader reader = cmd.ExecuteReader(CommandBehavior.CloseConnection);
while (reader.Read())
{
T obj = OracleHelper.ExecuteDataReader<T>(reader);
list.Add(obj);
}
}
catch (Exception ex)
{
list = null;
}
}
}
return list;
}
#endregion
#endregion #region 增删改查
#region 根据sequence名称获取下一个ID
/// <summary>
/// 根据sequence名称获取下一个ID
/// </summary>
public static int GetNextID(string sequenceName)
{
string sql = string.Format("select {0}.Nextval from dual", sequenceName);
DataTable dt = Query(sql).Tables[];
return int.Parse(dt.Rows[][].ToString());
}
#endregion #region 添加
/// <summary>
/// 添加
/// </summary>
public static void Insert(object obj)
{
StringBuilder strSql = new StringBuilder();
Type type = obj.GetType();
strSql.Append(string.Format("insert into {0}(", type.Name)); PropertyInfo[] propertyInfoList = type.GetProperties();
List<string> propertyNameList = new List<string>();
int savedCount = ;
foreach (PropertyInfo propertyInfo in propertyInfoList)
{
if (propertyInfo.GetCustomAttributes(typeof(NotSaveAttribute), false).Length == )
{
if (propertyInfo.GetCustomAttributes(typeof(IsEntityAttribute), false).Length == )
{
object val = propertyInfo.GetValue(obj, null);
if (val != null)
{
propertyNameList.Add(propertyInfo.Name);
savedCount++;
}
}
else
{
object val = propertyInfo.GetValue(obj, null);
if (val != null)
{
propertyNameList.Add(propertyInfo.Name + "Id");
savedCount++;
}
}
}
} strSql.Append(string.Format("{0})", string.Join(",", propertyNameList.ToArray())));
strSql.Append(string.Format(" values ({0})", string.Join(",", propertyNameList.ConvertAll<string>(a => ":" + a).ToArray())));
OracleParameter[] parameters = new OracleParameter[savedCount];
int i = ;
foreach (PropertyInfo propertyInfo in propertyInfoList)
{
if (propertyInfo.GetCustomAttributes(typeof(NotSaveAttribute), false).Length == )
{
if (propertyInfo.GetCustomAttributes(typeof(IsEntityAttribute), false).Length == )
{
object val = propertyInfo.GetValue(obj, null);
if (val != null)
{
OracleParameter oracleParameter = new OracleParameter(":" + propertyInfo.Name, propertyInfo.GetValue(obj, null));
parameters[i++] = oracleParameter;
}
}
else
{
object val = propertyInfo.GetValue(obj, null);
if (val != null)
{
object valProVal = val.GetType().GetProperty("Id").GetValue(val, null);
OracleParameter oracleParameter = new OracleParameter(":" + propertyInfo.Name + "Id", valProVal);
parameters[i++] = oracleParameter;
}
}
}
} ExecuteSql(strSql.ToString(), parameters);
}
#endregion #region 修改
/// <summary>
/// 修改
/// </summary>
public static void Update(object obj)
{
object oldObj = Find(obj);
if (oldObj == null) throw new Exception("无法获取到旧数据"); StringBuilder strSql = new StringBuilder();
Type type = obj.GetType();
strSql.Append(string.Format("update {0} ", type.Name)); PropertyInfo[] propertyInfoList = type.GetProperties();
List<string> propertyNameList = new List<string>();
int savedCount = ;
foreach (PropertyInfo propertyInfo in propertyInfoList)
{
if (propertyInfo.GetCustomAttributes(typeof(NotSaveAttribute), false).Length == )
{
if (propertyInfo.GetCustomAttributes(typeof(IsEntityAttribute), false).Length == )
{
object oldVal = propertyInfo.GetValue(oldObj, null);
object val = propertyInfo.GetValue(obj, null);
if (!object.Equals(oldVal, val))
{
propertyNameList.Add(propertyInfo.Name);
savedCount++;
}
}
else
{
object val = propertyInfo.GetValue(obj, null);
object oldVal = propertyInfo.GetValue(oldObj, null);
object oldValProVal = oldVal == null ? null : GetIdVal(oldVal);
object valProVal = val == null ? null : GetIdVal(val);
if (!object.Equals(oldValProVal, valProVal))
{
propertyNameList.Add(propertyInfo.Name);
savedCount++;
}
}
}
} strSql.Append(string.Format(" set "));
OracleParameter[] parameters = new OracleParameter[savedCount];
int i = ;
StringBuilder sbPros = new StringBuilder();
foreach (PropertyInfo propertyInfo in propertyInfoList)
{
if (propertyInfo.GetCustomAttributes(typeof(NotSaveAttribute), false).Length == )
{
if (propertyInfo.GetCustomAttributes(typeof(IsEntityAttribute), false).Length == )
{
object oldVal = propertyInfo.GetValue(oldObj, null);
object val = propertyInfo.GetValue(obj, null);
if (!object.Equals(oldVal, val))
{
sbPros.Append(string.Format(" {0}=:{0},", propertyInfo.Name));
OracleParameter oracleParameter = new OracleParameter(":" + propertyInfo.Name, val == null ? DBNull.Value : val);
parameters[i++] = oracleParameter;
}
}
else
{
object oldVal = propertyInfo.GetValue(oldObj, null);
object val = propertyInfo.GetValue(obj, null);
object oldValProVal = oldVal == null ? null : GetIdVal(oldVal);
object valProVal = val == null ? null : GetIdVal(val);
if (!object.Equals(oldValProVal, valProVal))
{
sbPros.Append(string.Format(" {0}=:{0},", propertyInfo.Name + "Id")); OracleParameter oracleParameter = new OracleParameter(":" + propertyInfo.Name + "Id", valProVal == null ? DBNull.Value : valProVal);
parameters[i++] = oracleParameter;
}
}
} if (propertyInfo.GetCustomAttributes(typeof(IsEntityAttribute), false).Length > )
{
object val = propertyInfo.GetValue(obj, null);
if (val != null && Find(val) != null)
{
Update(val);
}
}
}
if (sbPros.Length > )
{
strSql.Append(sbPros.ToString(, sbPros.Length - ));
}
strSql.Append(string.Format(" where {0}={1}", GetIdName(obj.GetType()), int.Parse(GetIdVal(obj).ToString()))); if (savedCount > )
{
ExecuteSql(strSql.ToString(), parameters);
}
}
#endregion #region 删除
/// <summary>
/// 根据Id删除
/// </summary>
public static void Delete<T>(int id)
{
Type type = typeof(T);
StringBuilder sbSql = new StringBuilder();
sbSql.Append(string.Format("delete from {0} where {2}={1}", type.Name, id, GetIdName(type))); ExecuteSql(sbSql.ToString());
}
/// <summary>
/// 根据Id集合删除
/// </summary>
public static void BatchDelete<T>(string ids)
{
if (string.IsNullOrWhiteSpace(ids)) return; Type type = typeof(T);
StringBuilder sbSql = new StringBuilder();
sbSql.Append(string.Format("delete from {0} where {2} in ({1})", type.Name, ids, GetIdName(type))); ExecuteSql(sbSql.ToString());
}
/// <summary>
/// 根据条件删除
/// </summary>
public static void Delete<T>(string conditions)
{
if (string.IsNullOrWhiteSpace(conditions)) return; Type type = typeof(T);
StringBuilder sbSql = new StringBuilder();
sbSql.Append(string.Format("delete from {0} where {1}", type.Name, conditions)); ExecuteSql(sbSql.ToString());
}
#endregion #region 获取实体
#region 根据实体获取实体
/// <summary>
/// 根据实体获取实体
/// </summary>
private static object Find(object obj)
{
Type type = obj.GetType(); object result = Activator.CreateInstance(type);
bool hasValue = false;
IDataReader rd = null; string sql = string.Format("select * from {0} where {2}={1}", type.Name, GetIdVal(obj), GetIdName(obj.GetType())); try
{
rd = ExecuteReader(sql); PropertyInfo[] propertyInfoList = type.GetProperties(); int fcnt = rd.FieldCount;
List<string> fileds = new List<string>();
for (int i = ; i < fcnt; i++)
{
fileds.Add(rd.GetName(i).ToUpper());
} while (rd.Read())
{
hasValue = true;
IDataRecord record = rd; foreach (PropertyInfo pro in propertyInfoList)
{
if (pro.PropertyType.IsClass)
{
object[] objArray = pro.GetCustomAttributes(typeof(IsEntityAttribute), false);
if (objArray.Length > )
{
if (record[pro.Name + "Id"].GetType() == typeof(int))
{
pro.SetValue(result, record[pro.Name + "Id"] == DBNull.Value ? null : FindById(pro.PropertyType, (int)record[pro.Name + "Id"]), null);
}
if (record[pro.Name + "Id"].GetType() == typeof(decimal))
{
pro.SetValue(result, record[pro.Name + "Id"] == DBNull.Value ? null : FindById(pro.PropertyType, int.Parse(((decimal)record[pro.Name + "Id"]).ToString())), null);
}
continue;
}
} if (!fileds.Contains(pro.Name.ToUpper()) || record[pro.Name] == DBNull.Value)
{
continue;
} pro.SetValue(result, record[pro.Name] == DBNull.Value ? null : getReaderValue(record[pro.Name], pro.PropertyType), null);
}
}
}
catch (Exception ex)
{
throw ex;
}
finally
{
if (rd != null && !rd.IsClosed)
{
rd.Close();
rd.Dispose();
}
} if (hasValue)
{
return result;
}
else
{
return null;
}
}
#endregion #region 根据Id获取实体
/// <summary>
/// 根据Id获取实体
/// </summary>
private static object FindById(Type type, int id)
{
object result = Activator.CreateInstance(type);
IDataReader rd = null;
bool hasValue = false; string sql = string.Format("select * from {0} where {2}={1}", type.Name, id, GetIdName(type)); try
{
rd = ExecuteReader(sql); PropertyInfo[] propertyInfoList = type.GetProperties(); int fcnt = rd.FieldCount;
List<string> fileds = new List<string>();
for (int i = ; i < fcnt; i++)
{
fileds.Add(rd.GetName(i).ToUpper());
} while (rd.Read())
{
hasValue = true;
IDataRecord record = rd; foreach (PropertyInfo pro in propertyInfoList)
{
if (pro.PropertyType.IsClass)
{
object[] objArray = pro.GetCustomAttributes(typeof(IsEntityAttribute), false);
if (objArray.Length > )
{
if (record[pro.Name + "Id"].GetType() == typeof(int))
{
pro.SetValue(result, record[pro.Name + "Id"] == DBNull.Value ? null : FindById(pro.PropertyType, (int)record[pro.Name + "Id"]), null);
}
if (record[pro.Name + "Id"].GetType() == typeof(decimal))
{
pro.SetValue(result, record[pro.Name + "Id"] == DBNull.Value ? null : FindById(pro.PropertyType, int.Parse(((decimal)record[pro.Name + "Id"]).ToString())), null);
}
continue;
}
} if (!fileds.Contains(pro.Name.ToUpper()) || record[pro.Name] == DBNull.Value)
{
continue;
} pro.SetValue(result, record[pro.Name] == DBNull.Value ? null : getReaderValue(record[pro.Name], pro.PropertyType), null);
}
}
}
catch (Exception ex)
{
throw ex;
}
finally
{
if (rd != null && !rd.IsClosed)
{
rd.Close();
rd.Dispose();
}
} if (hasValue)
{
return result;
}
else
{
return null;
}
}
#endregion #region 根据Id获取实体
/// <summary>
/// 根据Id获取实体
/// </summary>
public static T FindById<T>(int id) where T : new()
{
Type type = typeof(T);
T result = (T)Activator.CreateInstance(type);
IDataReader rd = null;
bool hasValue = false; string sql = string.Format("select * from {0} where {2}={1}", type.Name, id, GetIdName(type)); try
{
rd = ExecuteReader(sql); PropertyInfo[] propertyInfoList = type.GetProperties(); int fcnt = rd.FieldCount;
List<string> fileds = new List<string>();
for (int i = ; i < fcnt; i++)
{
fileds.Add(rd.GetName(i).ToUpper());
} while (rd.Read())
{
hasValue = true;
IDataRecord record = rd; foreach (PropertyInfo pro in propertyInfoList)
{
if (pro.PropertyType.IsClass)
{
object[] objArray = pro.GetCustomAttributes(typeof(IsEntityAttribute), false);
if (objArray.Length > )
{
if (record[pro.Name + "Id"].GetType() == typeof(int))
{
pro.SetValue(result, record[pro.Name + "Id"] == DBNull.Value ? null : FindById(pro.PropertyType, (int)record[pro.Name + "Id"]), null);
}
if (record[pro.Name + "Id"].GetType() == typeof(decimal))
{
pro.SetValue(result, record[pro.Name + "Id"] == DBNull.Value ? null : FindById(pro.PropertyType, int.Parse(((decimal)record[pro.Name + "Id"]).ToString())), null);
}
continue;
}
} if (!fileds.Contains(pro.Name.ToUpper()) || record[pro.Name] == DBNull.Value)
{
continue;
} pro.SetValue(result, record[pro.Name] == DBNull.Value ? null : getReaderValue(record[pro.Name], pro.PropertyType), null);
}
}
}
catch (Exception ex)
{
throw ex;
}
finally
{
if (rd != null && !rd.IsClosed)
{
rd.Close();
rd.Dispose();
}
} if (hasValue)
{
return result;
}
else
{
return default(T);
}
}
#endregion
#endregion #region 获取列表
/// <summary>
/// 获取列表
/// </summary>
public static List<T> FindListBySql<T>(string sql) where T : new()
{
List<T> list = new List<T>();
object obj;
IDataReader rd = null; try
{
rd = ExecuteReader(sql); if (typeof(T) == typeof(int))
{
while (rd.Read())
{
list.Add((T)rd[]);
}
}
else if (typeof(T) == typeof(string))
{
while (rd.Read())
{
list.Add((T)rd[]);
}
}
else
{
PropertyInfo[] propertyInfoList = (typeof(T)).GetProperties(); int fcnt = rd.FieldCount;
List<string> fileds = new List<string>();
for (int i = ; i < fcnt; i++)
{
fileds.Add(rd.GetName(i).ToUpper());
} while (rd.Read())
{
IDataRecord record = rd;
obj = new T(); foreach (PropertyInfo pro in propertyInfoList)
{
if (pro.PropertyType.IsClass)
{
if (pro.GetCustomAttributes(typeof(IsEntityAttribute), false).Length > )
{
if (record[pro.Name + "Id"].GetType() == typeof(int))
{
pro.SetValue(obj, record[pro.Name + "Id"] == DBNull.Value ? null : FindById(pro.PropertyType, (int)record[pro.Name + "Id"]), null);
}
if (record[pro.Name + "Id"].GetType() == typeof(decimal))
{
pro.SetValue(obj, record[pro.Name + "Id"] == DBNull.Value ? null : FindById(pro.PropertyType, int.Parse(((decimal)record[pro.Name + "Id"]).ToString())), null);
}
continue;
}
} if (!fileds.Contains(pro.Name.ToUpper()) || record[pro.Name] == DBNull.Value)
{
continue;
} pro.SetValue(obj, record[pro.Name] == DBNull.Value ? null : getReaderValue(record[pro.Name], pro.PropertyType), null);
}
list.Add((T)obj);
}
}
}
catch (Exception ex)
{
throw ex;
}
finally
{
if (rd != null && !rd.IsClosed)
{
rd.Close();
rd.Dispose();
}
} return list;
}
#endregion #region 获取列表
/// <summary>
/// 获取列表
/// </summary>
public static List<T> FindListBySql<T>(string sql, params OracleParameter[] cmdParms) where T : new()
{
List<T> list = new List<T>();
object obj;
IDataReader rd = null; try
{
rd = ExecuteReader(sql, cmdParms); if (typeof(T) == typeof(int))
{
while (rd.Read())
{
list.Add((T)rd[]);
}
}
else if (typeof(T) == typeof(string))
{
while (rd.Read())
{
list.Add((T)rd[]);
}
}
else
{
PropertyInfo[] propertyInfoList = (typeof(T)).GetProperties(); int fcnt = rd.FieldCount;
List<string> fileds = new List<string>();
for (int i = ; i < fcnt; i++)
{
fileds.Add(rd.GetName(i).ToUpper());
} while (rd.Read())
{
IDataRecord record = rd;
obj = new T(); foreach (PropertyInfo pro in propertyInfoList)
{
if (pro.PropertyType.IsClass)
{
if (pro.GetCustomAttributes(typeof(IsEntityAttribute), false).Length > )
{
if (record[pro.Name + "Id"].GetType() == typeof(int))
{
pro.SetValue(obj, record[pro.Name + "Id"] == DBNull.Value ? null : FindById(pro.PropertyType, (int)record[pro.Name + "Id"]), null);
}
if (record[pro.Name + "Id"].GetType() == typeof(decimal))
{
pro.SetValue(obj, record[pro.Name + "Id"] == DBNull.Value ? null : FindById(pro.PropertyType, int.Parse(((decimal)record[pro.Name + "Id"]).ToString())), null);
}
continue;
}
} if (!fileds.Contains(pro.Name.ToUpper()) || record[pro.Name] == DBNull.Value)
{
continue;
} pro.SetValue(obj, record[pro.Name] == DBNull.Value ? null : getReaderValue(record[pro.Name], pro.PropertyType), null);
}
list.Add((T)obj);
}
}
}
catch (Exception ex)
{
throw ex;
}
finally
{
if (rd != null && !rd.IsClosed)
{
rd.Close();
rd.Dispose();
}
} return list;
}
#endregion #region 分页获取列表
/// <summary>
/// 分页(任意entity，尽量少的字段)
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="sql"></param>
/// <returns></returns>
public static PageViewModel FindPageBySql<T>(string sql, string orderby, int pageSize, int currentPage) where T : new()
{
PageViewModel pageViewModel = new PageViewModel(); using (OracleConnection connection = new OracleConnection(connectionString))
{
connection.Open();
string commandText = string.Format("select count(*) from ({0}) T", sql);
IDbCommand cmd = new OracleCommand(commandText, connection);
pageViewModel.total = int.Parse(cmd.ExecuteScalar().ToString()); int startRow = pageSize * (currentPage - );
int endRow = startRow + pageSize; StringBuilder sb = new StringBuilder();
sb.Append("select * from ( select row_limit.*, rownum rownum_ from (");
sb.Append(sql);
if (!string.IsNullOrWhiteSpace(orderby))
{
sb.Append(" ");
sb.Append(orderby);
}
sb.Append(" ) row_limit where rownum <= ");
sb.Append(endRow);
sb.Append(" ) where rownum_ >");
sb.Append(startRow); List<T> list = FindListBySql<T>(sb.ToString());
pageViewModel.rows = list;
} return pageViewModel;
}
#endregion #region 分页获取列表
/// <summary>
/// 分页(任意entity，尽量少的字段)
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="sql"></param>
/// <returns></returns>
public static PageViewModel FindPageBySql<T>(string sql, string orderby, int pageSize, int currentPage, params OracleParameter[] cmdParms) where T : new()
{
PageViewModel pageViewModel = new PageViewModel(); using (OracleConnection connection = new OracleConnection(connectionString))
{
connection.Open();
string commandText = string.Format("select count(*) from ({0}) T", sql);
OracleCommand cmd = new OracleCommand(commandText, connection);
PrepareCommand(cmd, connection, null, commandText, cmdParms);
pageViewModel.total = int.Parse(cmd.ExecuteScalar().ToString());
cmd.Parameters.Clear(); int startRow = pageSize * (currentPage - );
int endRow = startRow + pageSize; StringBuilder sb = new StringBuilder();
sb.Append("select * from ( select row_limit.*, rownum rownum_ from (");
sb.Append(sql);
if (!string.IsNullOrWhiteSpace(orderby))
{
sb.Append(" ");
sb.Append(orderby);
}
sb.Append(" ) row_limit where rownum <= ");
sb.Append(endRow);
sb.Append(" ) where rownum_ >");
sb.Append(startRow); List<T> list = FindListBySql<T>(sb.ToString(), cmdParms);
pageViewModel.rows = list;
} return pageViewModel;
} #endregion #region 分页获取列表
/// <summary>
/// 分页(任意entity，尽量少的字段)
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="sql"></param>
/// <returns></returns>
public static DataSet FindPageBySql(string sql, string orderby, int pageSize, int currentPage, out int resultCount, params OracleParameter[] cmdParms)
{
DataSet ds = null; using (OracleConnection connection = new OracleConnection(connectionString))
{
connection.Open();
string commandText = string.Format("select count(*) from ({0}) T", sql);
IDbCommand cmd = new OracleCommand(commandText, connection);
resultCount = int.Parse(cmd.ExecuteScalar().ToString()); int startRow = pageSize * (currentPage - );
int endRow = startRow + pageSize; StringBuilder sb = new StringBuilder();
sb.Append("select * from ( select row_limit.*, rownum rownum_ from (");
sb.Append(sql);
if (!string.IsNullOrWhiteSpace(orderby))
{
sb.Append(" ");
sb.Append(orderby);
}
sb.Append(" ) row_limit where rownum <= ");
sb.Append(endRow);
sb.Append(" ) where rownum_ >");
sb.Append(startRow); ds = Query(sql, cmdParms);
} return ds;
}
#endregion #region getReaderValue 转换数据
/// <summary>
/// 转换数据
/// </summary>
private static Object getReaderValue(Object rdValue, Type ptype)
{ if (ptype == typeof(decimal))
return Convert.ToDecimal(rdValue); if (ptype == typeof(int))
return Convert.ToInt32(rdValue); if (ptype == typeof(long))
return Convert.ToInt64(rdValue); return rdValue;
}
#endregion #region 获取主键名称
/// <summary>
/// 获取主键名称
/// </summary>
public static string GetIdName(Type type)
{
PropertyInfo[] propertyInfoList = type.GetProperties();
foreach (PropertyInfo propertyInfo in propertyInfoList)
{
if (propertyInfo.GetCustomAttributes(typeof(IsIdAttribute), false).Length > )
{
return propertyInfo.Name;
}
}
return "Id";
}
#endregion #region 获取主键值
/// <summary>
/// 获取主键名称
/// </summary>
public static object GetIdVal(object val)
{
string idName = GetIdName(val.GetType());
if (!string.IsNullOrWhiteSpace(idName))
{
return val.GetType().GetProperty(idName).GetValue(val, null);
}
return ;
}
#endregion
#endregion #region 事务
#region 开始事务
/// <summary>
/// 开始事务
/// </summary>
public static void BeginTransaction()
{
GetTran();
AddTranFlag();
}
#endregion #region 结束事务(正常结束)
/// <summary>
/// 结束事务(正常结束)
/// </summary>
public static void EndTransaction()
{
try
{
GetTran().Commit();
RemoveTranFlag();
}
catch (Exception ex)
{
GetTran().Rollback();
RemoveTranFlag();
}
finally
{
GetOpenConnection().Close();
}
}
#endregion #region 回滚事务(出错时调用该方法回滚)
/// <summary>
/// 回滚事务(出错时调用该方法回滚)
/// </summary>
public static void RollbackTransaction()
{
GetTran().Rollback();
RemoveTranFlag();
GetOpenConnection().Close();
}
#endregion
#endregion }
}
辅助类代码：
NotSaveAttribute.cs：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text; namespace DBUtil
{
/// <summary>
/// ORM在保存数据的时候，会忽略打上 NotSave 批注的属性
/// </summary>
[Serializable, AttributeUsage(AttributeTargets.Property | AttributeTargets.Class)]
public class NotSaveAttribute : Attribute
{
}
}
IsEntityAttribute.cs：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text; namespace Models
{
/// <summary>
/// 标识该属性是实体
/// </summary>
[Serializable, AttributeUsage(AttributeTargets.Property | AttributeTargets.Class)]
public class IsEntityAttribute : Attribute
{
}
}
PageViewModel.cs：
using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using System.Web; namespace Models
{
public class PageViewModel
{
/// <summary>
/// 记录
/// </summary>
public IEnumerable rows { get; set; } /// <summary>
/// 记录数
/// </summary>
public int total { get; set; }
}
}
示例代码：
Models层代码：
Brand.cs：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using DBUtil; namespace Models
{
public class Brand
{
public int Id { get; set; }
public string Name { get; set; }
public int BrandCount { get; set; }
public DateTime? BrandDate { get; set; }
[NotSave]
public string NotSaved { get; set; }
[IsEntity]
public BrandChild bc { get; set; }
public byte[] Blb { get; set; }
public string Clb { get; set; }
}
}
BrandChild.cs：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using DBUtil; namespace Models
{
public class BrandChild
{
public int Id { get; set; }
public string Name { get; set; }
public int Val { get; set; }
[IsEntity]
public BrandChildChild bcc { get; set; }
}
}
BrandChildChild.cs：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text; namespace Models
{
public class BrandChildChild
{
public int Id { get; set; }
public string Name { get; set; }
public int Val { get; set; }
}
}
DAL层代码：
DalBase.cs：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using DBUtil;
using Models; namespace DAL
{
/// <summary>
/// DAL基类
/// </summary>
public class DalBase
{
/// <summary>
/// 添加
/// </summary>
public static void Insert(object obj)
{
OracleHelper.Insert(obj);
} /// <summary>
/// 修改
/// </summary>
public static void Update(object obj)
{
OracleHelper.Update(obj);
} /// <summary>
/// 删除
/// </summary>
public static void Delete<T>(int id)
{
OracleHelper.Delete<T>(id);
} /// <summary>
/// 批量删除
/// </summary>
/// <param name="ids">ID集合，逗号隔开</param>
public static void BatchDelete<T>(string ids)
{
OracleHelper.BatchDelete<T>(ids);
} /// <summary>
/// 查询列表
/// </summary>
public static List<T> FindListBySql<T>(string sql) where T : new()
{
return OracleHelper.FindListBySql<T>(sql);
} /// <summary>
/// 分页查询列表
/// </summary>
/// <param name="orderby">例："order by Id desc"</param>
/// <param name="pageSize">每页数据条数</param>
/// <param name="currentPage">当前页数</param>
public static PageViewModel FindPageBySql<T>(string sql, string orderby, int pageSize, int currentPage) where T : new()
{
return OracleHelper.FindPageBySql<T>(sql, orderby, pageSize, currentPage);
} }
}
BrandDal.cs：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using DBUtil; namespace DAL.Admin
{
/// <summary>
/// Brand
/// </summary>
public class BrandDal : DalBase
{
public static int GetNextID()
{
return OracleHelper.GetNextID("SEQ_BRAND");
}
}
}
Cotroller层测试代码片段：
public void Run()
{
#region 添加
if (false)
{
OracleHelper.BeginTransaction();
try
{
//子表的子表
BrandChildChild bcc1 = new BrandChildChild();
bcc1.Id = BrandDal.GetNextID();
bcc1.Name = "bcc1" + DateTime.Now.ToString();
BrandDal.Insert(bcc1); //子表
BrandChild bc1 = new BrandChild();
bc1.Id = BrandDal.GetNextID();
bc1.Name = "bc1" + DateTime.Now.ToString();
bc1.bcc = bcc1;
OracleHelper.Insert(bc1); //主表
Brand bd1 = new Brand();
bd1.Id = BrandDal.GetNextID();
bd1.Name = "bd1" + DateTime.Now.ToString();
bd1.bc = bc1; OracleHelper.Insert(bd1); OracleHelper.EndTransaction();
}
catch (Exception ex)
{
OracleHelper.RollbackTransaction();
}
}
#endregion #region 修改
if (false)
{
OracleHelper.BeginTransaction();
try
{
//替换子表
BrandChild bc1 = new BrandChild();
bc1.Id = BrandDal.GetNextID();
bc1.Name = "bc1" + DateTime.Now.ToString();
OracleHelper.Insert(bc1); //更新主表
Brand bd1 = OracleHelper.FindById<Brand>();
bd1.Name = "bd1" + DateTime.Now.ToString();
bd1.bc = bc1; OracleHelper.Update(bd1); OracleHelper.EndTransaction();
}
catch (Exception ex)
{
OracleHelper.RollbackTransaction();
}
}
#endregion #region 删除
if (false)
{
OracleHelper.BeginTransaction();
try
{
OracleHelper.Delete<Brand>();
OracleHelper.BatchDelete<Brand>("22,23"); OracleHelper.EndTransaction();
}
catch (Exception ex)
{
OracleHelper.RollbackTransaction();
}
}
#endregion #region 大文本
if (false)
{
Brand bd1 = OracleHelper.FindById<Brand>();
bd1.Blb = Encoding.Default.GetBytes("大家好！");
bd1.Clb = "大家好！";
OracleHelper.Update(bd1); Brand bd12 = OracleHelper.FindById<Brand>();
}
#endregion #region 查询列表
List<Brand> brandList = BrandDal.FindListBySql<Brand>("select * from BRAND");
#endregion #region 分页查询列表
PageViewModel pageViewModel = BrandDal.FindPageBySql<Brand>("select * from BRAND", "order by Id desc", , );
#endregion }