C#全能数据库操作类及调用示例
using System;
using System.Data;
using System.Data.Common;
using System.Configuration;
namespace MSCL
{
/// /// DbHelper通用数据库类
/// public class DbHelper
{
/// ///
/// private static string dbProviderName = ConfigurationManager.AppSettings["DbHelperProvider"]; /// ///
/// private static string dbConnectionString = ConfigurationManager.AppSettings["ConnectionString"]; private DbConnection connection;
public DbHelper()
{
this.connection = CreateConnection(DbHelper.dbConnectionString);
}
public DbHelper(string connectionString)
{
this.connection = CreateConnection(connectionString);
}
public static DbConnection CreateConnection()
{
DbProviderFactory dbfactory = DbProviderFactories.GetFactory(DbHelper.dbProviderName);
DbConnection dbconn = dbfactory.CreateConnection();
dbconn.ConnectionString = DbHelper.dbConnectionString;
return dbconn;
}
public static DbConnection CreateConnection(string connectionString)
{
DbProviderFactory dbfactory = DbProviderFactories.GetFactory(DbHelper.dbProviderName);
DbConnection dbconn = dbfactory.CreateConnection();
dbconn.ConnectionString = connectionString;
return dbconn;
} /// /// 执行存储过程
/// ///存储过程名
///
public DbCommand GetStoredProcCommand(string storedProcedure)
{
DbCommand dbCommand = connection.CreateCommand();
dbCommand.CommandText = storedProcedure;
dbCommand.CommandType = CommandType.StoredProcedure;
return dbCommand;
} /// /// 执行SQL语句
/// ///SQL语句
///
public DbCommand GetSqlStringCommand(string sqlQuery)
{
DbCommand dbCommand = connection.CreateCommand();
dbCommand.CommandText = sqlQuery;
dbCommand.CommandType = CommandType.Text;
return dbCommand;
} #region 增加参数 public void AddParameterCollection(DbCommand cmd, DbParameterCollection dbParameterCollection)
{
foreach (DbParameter dbParameter in dbParameterCollection)
{
cmd.Parameters.Add(dbParameter);
}
} /// /// 增加输出参数
/// ///
///
///
///
public void AddOutParameter(DbCommand cmd, string parameterName, DbType dbType, int size)
{
DbParameter dbParameter = cmd.CreateParameter();
dbParameter.DbType = dbType;
dbParameter.ParameterName = parameterName;
dbParameter.Size = size;
dbParameter.Direction = ParameterDirection.Output;
cmd.Parameters.Add(dbParameter);
} /// /// 增加输入参数
/// ///
///
///
///
public void AddInParameter(DbCommand cmd, string parameterName, DbType dbType, object value)
{
DbParameter dbParameter = cmd.CreateParameter();
dbParameter.DbType = dbType;
dbParameter.ParameterName = parameterName;
dbParameter.Value = value;
dbParameter.Direction = ParameterDirection.Input;
cmd.Parameters.Add(dbParameter);
} /// /// 增加返回参数
/// ///
///
///
public void AddReturnParameter(DbCommand cmd, string parameterName, DbType dbType)
{
DbParameter dbParameter = cmd.CreateParameter();
dbParameter.DbType = dbType;
dbParameter.ParameterName = parameterName;
dbParameter.Direction = ParameterDirection.ReturnValue;
cmd.Parameters.Add(dbParameter);
} public DbParameter GetParameter(DbCommand cmd, string parameterName)
{
return cmd.Parameters[parameterName];
} #endregion #region 执行 /// /// 执行查询返回DataSet
/// ///
///
public DataSet ExecuteDataSet(DbCommand cmd)
{
DbProviderFactory dbfactory = DbProviderFactories.GetFactory(DbHelper.dbProviderName);
DbDataAdapter dbDataAdapter = dbfactory.CreateDataAdapter();
dbDataAdapter.SelectCommand = cmd;
DataSet ds = new DataSet();
dbDataAdapter.Fill(ds);
return ds;
} /// /// 执行查询返回DataTable
/// ///
///
public DataTable ExecuteDataTable(DbCommand cmd)
{
DbProviderFactory dbfactory = DbProviderFactories.GetFactory(DbHelper.dbProviderName);
DbDataAdapter dbDataAdapter = dbfactory.CreateDataAdapter();
dbDataAdapter.SelectCommand = cmd;
DataTable dataTable = new DataTable();
dbDataAdapter.Fill(dataTable);
return dataTable;
} /// /// 执行查询返回DataReader
/// ///
///
public DbDataReader ExecuteReader(DbCommand cmd)
{
cmd.Connection.Open();
DbDataReader reader = cmd.ExecuteReader(CommandBehavior.CloseConnection);
return reader;
} /// /// 执行SQL语句，返回影响行数
/// ///
///
public int ExecuteNonQuery(DbCommand cmd)
{
cmd.Connection.Open();
int ret = cmd.ExecuteNonQuery();
cmd.Connection.Close();
return ret;
} /// /// 返回首行首列对象
/// ///
///
public object ExecuteScalar(DbCommand cmd)
{
cmd.Connection.Open();
object ret = cmd.ExecuteScalar();
cmd.Connection.Close();
return ret;
}
#endregion #region 执行事务 /// /// 执行事务返回DataSet
/// ///
///
///
public DataSet ExecuteDataSet(DbCommand cmd, Trans t)
{
cmd.Connection = t.DbConnection;
cmd.Transaction = t.DbTrans;
DbProviderFactory dbfactory = DbProviderFactories.GetFactory(DbHelper.dbProviderName);
DbDataAdapter dbDataAdapter = dbfactory.CreateDataAdapter();
dbDataAdapter.SelectCommand = cmd;
DataSet ds = new DataSet();
dbDataAdapter.Fill(ds);
return ds;
} /// /// 执行事务返回DataTable
/// ///
///
///
public DataTable ExecuteDataTable(DbCommand cmd, Trans t)
{
cmd.Connection = t.DbConnection;
cmd.Transaction = t.DbTrans;
DbProviderFactory dbfactory = DbProviderFactories.GetFactory(DbHelper.dbProviderName);
DbDataAdapter dbDataAdapter = dbfactory.CreateDataAdapter();
dbDataAdapter.SelectCommand = cmd;
DataTable dataTable = new DataTable();
dbDataAdapter.Fill(dataTable);
return dataTable;
} /// /// 执行事务返回DataReader
/// ///
///
///
public DbDataReader ExecuteReader(DbCommand cmd, Trans t)
{
cmd.Connection.Close();
cmd.Connection = t.DbConnection;
cmd.Transaction = t.DbTrans;
DbDataReader reader = cmd.ExecuteReader();
return reader;
} /// /// 执行事务SQL语句返回影响行数
/// ///
///
///
public int ExecuteNonQuery(DbCommand cmd, Trans t)
{
cmd.Connection.Close();
cmd.Connection = t.DbConnection;
cmd.Transaction = t.DbTrans;
int ret = cmd.ExecuteNonQuery();
return ret;
} /// /// 执行事务SQL语句返回首行首列
/// ///
///
///
public object ExecuteScalar(DbCommand cmd, Trans t)
{
cmd.Connection.Close();
cmd.Connection = t.DbConnection;
cmd.Transaction = t.DbTrans;
object ret = cmd.ExecuteScalar();
return ret;
}
#endregion
} public class Trans : IDisposable
{
private DbConnection conn;
private DbTransaction dbTrans;
public DbConnection DbConnection
{
get { return this.conn; }
}
public DbTransaction DbTrans
{
get { return this.dbTrans; }
} public Trans()
{
conn = DbHelper.CreateConnection();
conn.Open();
dbTrans = conn.BeginTransaction();
}
public Trans(string connectionString)
{
conn = DbHelper.CreateConnection(connectionString);
conn.Open();
dbTrans = conn.BeginTransaction();
}
public void Commit()
{
dbTrans.Commit();
this.Colse();
} public void RollBack()
{
dbTrans.Rollback();
this.Colse();
} public void Dispose()
{
this.Colse();
} public void Colse()
{
if (conn.State == System.Data.ConnectionState.Open)
{
conn.Close();
}
}
}
} using System;
using System.Data;
using System.Data.Common;
using System.Configuration;
namespace MSCL
{
/// /// DbHelper通用数据库类
/// public class DbHelper
{
/// ///
/// private static string dbProviderName = ConfigurationManager.AppSettings["DbHelperProvider"]; /// ///
/// private static string dbConnectionString = ConfigurationManager.AppSettings["ConnectionString"]; private DbConnection connection;
public DbHelper()
{
this.connection = CreateConnection(DbHelper.dbConnectionString);
}
public DbHelper(string connectionString)
{
this.connection = CreateConnection(connectionString);
}
public static DbConnection CreateConnection()
{
DbProviderFactory dbfactory = DbProviderFactories.GetFactory(DbHelper.dbProviderName);
DbConnection dbconn = dbfactory.CreateConnection();
dbconn.ConnectionString = DbHelper.dbConnectionString;
return dbconn;
}
public static DbConnection CreateConnection(string connectionString)
{
DbProviderFactory dbfactory = DbProviderFactories.GetFactory(DbHelper.dbProviderName);
DbConnection dbconn = dbfactory.CreateConnection();
dbconn.ConnectionString = connectionString;
return dbconn;
} /// /// 执行存储过程
/// ///存储过程名
///
public DbCommand GetStoredProcCommand(string storedProcedure)
{
DbCommand dbCommand = connection.CreateCommand();
dbCommand.CommandText = storedProcedure;
dbCommand.CommandType = CommandType.StoredProcedure;
return dbCommand;
} /// /// 执行SQL语句
/// ///SQL语句
///
public DbCommand GetSqlStringCommand(string sqlQuery)
{
DbCommand dbCommand = connection.CreateCommand();
dbCommand.CommandText = sqlQuery;
dbCommand.CommandType = CommandType.Text;
return dbCommand;
} #region 增加参数 public void AddParameterCollection(DbCommand cmd, DbParameterCollection dbParameterCollection)
{
foreach (DbParameter dbParameter in dbParameterCollection)
{
cmd.Parameters.Add(dbParameter);
}
} /// /// 增加输出参数
/// ///
///
///
///
public void AddOutParameter(DbCommand cmd, string parameterName, DbType dbType, int size)
{
DbParameter dbParameter = cmd.CreateParameter();
dbParameter.DbType = dbType;
dbParameter.ParameterName = parameterName;
dbParameter.Size = size;
dbParameter.Direction = ParameterDirection.Output;
cmd.Parameters.Add(dbParameter);
} /// /// 增加输入参数
/// ///
///
///
///
public void AddInParameter(DbCommand cmd, string parameterName, DbType dbType, object value)
{
DbParameter dbParameter = cmd.CreateParameter();
dbParameter.DbType = dbType;
dbParameter.ParameterName = parameterName;
dbParameter.Value = value;
dbParameter.Direction = ParameterDirection.Input;
cmd.Parameters.Add(dbParameter);
} /// /// 增加返回参数
/// ///
///
///
public void AddReturnParameter(DbCommand cmd, string parameterName, DbType dbType)
{
DbParameter dbParameter = cmd.CreateParameter();
dbParameter.DbType = dbType;
dbParameter.ParameterName = parameterName;
dbParameter.Direction = ParameterDirection.ReturnValue;
cmd.Parameters.Add(dbParameter);
} public DbParameter GetParameter(DbCommand cmd, string parameterName)
{
return cmd.Parameters[parameterName];
} #endregion #region 执行 /// /// 执行查询返回DataSet
/// ///
///
public DataSet ExecuteDataSet(DbCommand cmd)
{
DbProviderFactory dbfactory = DbProviderFactories.GetFactory(DbHelper.dbProviderName);
DbDataAdapter dbDataAdapter = dbfactory.CreateDataAdapter();
dbDataAdapter.SelectCommand = cmd;
DataSet ds = new DataSet();
dbDataAdapter.Fill(ds);
return ds;
} /// /// 执行查询返回DataTable
/// ///
///
public DataTable ExecuteDataTable(DbCommand cmd)
{
DbProviderFactory dbfactory = DbProviderFactories.GetFactory(DbHelper.dbProviderName);
DbDataAdapter dbDataAdapter = dbfactory.CreateDataAdapter();
dbDataAdapter.SelectCommand = cmd;
DataTable dataTable = new DataTable();
dbDataAdapter.Fill(dataTable);
return dataTable;
} /// /// 执行查询返回DataReader
/// ///
///
public DbDataReader ExecuteReader(DbCommand cmd)
{
cmd.Connection.Open();
DbDataReader reader = cmd.ExecuteReader(CommandBehavior.CloseConnection);
return reader;
} /// /// 执行SQL语句，返回影响行数
/// ///
///
public int ExecuteNonQuery(DbCommand cmd)
{
cmd.Connection.Open();
int ret = cmd.ExecuteNonQuery();
cmd.Connection.Close();
return ret;
} /// /// 返回首行首列对象
/// ///
///
public object ExecuteScalar(DbCommand cmd)
{
cmd.Connection.Open();
object ret = cmd.ExecuteScalar();
cmd.Connection.Close();
return ret;
}
#endregion #region 执行事务 /// /// 执行事务返回DataSet
/// ///
///
///
public DataSet ExecuteDataSet(DbCommand cmd, Trans t)
{
cmd.Connection = t.DbConnection;
cmd.Transaction = t.DbTrans;
DbProviderFactory dbfactory = DbProviderFactories.GetFactory(DbHelper.dbProviderName);
DbDataAdapter dbDataAdapter = dbfactory.CreateDataAdapter();
dbDataAdapter.SelectCommand = cmd;
DataSet ds = new DataSet();
dbDataAdapter.Fill(ds);
return ds;
} /// /// 执行事务返回DataTable
/// ///
///
///
public DataTable ExecuteDataTable(DbCommand cmd, Trans t)
{
cmd.Connection = t.DbConnection;
cmd.Transaction = t.DbTrans;
DbProviderFactory dbfactory = DbProviderFactories.GetFactory(DbHelper.dbProviderName);
DbDataAdapter dbDataAdapter = dbfactory.CreateDataAdapter();
dbDataAdapter.SelectCommand = cmd;
DataTable dataTable = new DataTable();
dbDataAdapter.Fill(dataTable);
return dataTable;
} /// /// 执行事务返回DataReader
/// ///
///
///
public DbDataReader ExecuteReader(DbCommand cmd, Trans t)
{
cmd.Connection.Close();
cmd.Connection = t.DbConnection;
cmd.Transaction = t.DbTrans;
DbDataReader reader = cmd.ExecuteReader();
return reader;
} /// /// 执行事务SQL语句返回影响行数
/// ///
///
///
public int ExecuteNonQuery(DbCommand cmd, Trans t)
{
cmd.Connection.Close();
cmd.Connection = t.DbConnection;
cmd.Transaction = t.DbTrans;
int ret = cmd.ExecuteNonQuery();
return ret;
} /// /// 执行事务SQL语句返回首行首列
/// ///
///
///
public object ExecuteScalar(DbCommand cmd, Trans t)
{
cmd.Connection.Close();
cmd.Connection = t.DbConnection;
cmd.Transaction = t.DbTrans;
object ret = cmd.ExecuteScalar();
return ret;
}
#endregion
} public class Trans : IDisposable
{
private DbConnection conn;
private DbTransaction dbTrans;
public DbConnection DbConnection
{
get { return this.conn; }
}
public DbTransaction DbTrans
{
get { return this.dbTrans; }
} public Trans()
{
conn = DbHelper.CreateConnection();
conn.Open();
dbTrans = conn.BeginTransaction();
}
public Trans(string connectionString)
{
conn = DbHelper.CreateConnection(connectionString);
conn.Open();
dbTrans = conn.BeginTransaction();
}
public void Commit()
{
dbTrans.Commit();
this.Colse();
} public void RollBack()
{
dbTrans.Rollback();
this.Colse();
} public void Dispose()
{
this.Colse();
} public void Colse()
{
if (conn.State == System.Data.ConnectionState.Open)
{
conn.Close();
}
}
}
}
使用示例
using System;
using System.Collections.Generic;
using System.Text; namespace MSCL
{
#region 使用示例
/*
List ftvlist = new List();
ftvlist.Add(new FieldTypeValue("ErrorDetail", "这是个错误"));
ftvlist.Add(new FieldTypeValue("ErrorFlag", "1"));
ftvlist.Add(new FieldTypeValue("ErrorRemark","这是个错误，我还没有处理"));
ftvlist.Add(new FieldTypeValue("ErrorTime", DateTime.Now.ToString()));
ftvlist.Add(new FieldTypeValue("OprationTime", DateTime.Now.ToString()));
//新增
string sql = MSCL.BuilderSql.createInsertSql("AFM_SysLog", ftvlist);
MSCL.SqlHelper.ExecSql(sql);
//修改
string sql = MSCL.BuilderSql.createUpdateSql("AFM_SysLog", ftvlist, "ErrorID", "166");
MSCL.SqlHelper.ExecSql(sql);
//删除
string sql = MSCL.BuilderSql.createDeleteSql("AFM_SysLog", "ErrorID", "166");
MSCL.SqlHelper.ExecSql(sql);
*/
#endregion #region 数据表字段类
/// /// 数据表字段类
/// public class FieldTypeValue
{
/// /// 字段容器
/// ///字段名
///字段值
///是否数字字段
public FieldTypeValue(string fieldName, string fieldValue, bool isNum)
{
this.fieldName = fieldName;
this.fieldValue = fieldValue;
this.isNum = isNum;
} /// /// 字段容器
/// ///字段名
///字段值
public FieldTypeValue(string fieldName, string fieldValue)
{
this.fieldName = fieldName;
this.fieldValue = fieldValue;
} private string fieldName;
/// /// 字段名
/// public string FieldName
{
get { return fieldName; }
set { fieldName = value; }
} private bool isNum = false;
/// /// 是否数字
/// public bool IsNum
{
get { return isNum; }
set { isNum = value; }
} private string fieldValue;
/// /// 字段值
/// public string FieldValue
{
get { return fieldValue; }
set { fieldValue = value; }
}
}
#endregion #region SQL语句的构造类
/// /// SQL语句的构造类
/// public class BuilderSql
{ /// /// 构造新增Insert语句
/// ///表名
///字段list
///
public static string createInsertSql(string tableName, List ftvlist)
{
StringBuilder sb = new StringBuilder();
sb.Append(" insert into ");
sb.Append(tableName);
sb.Append("(");
for (int i = ; i < ftvlist.Count; i++)
{
FieldTypeValue ftv = (FieldTypeValue)ftvlist[i];
if (i != ftvlist.Count - )
{
sb.Append(ftv.FieldName + ",");
}
else
{
sb.Append(ftv.FieldName);
}
}
sb.Append(") values(");
for (int i = ; i < ftvlist.Count; i++)
{
FieldTypeValue ftv = (FieldTypeValue)ftvlist[i];
if (ftv.IsNum)
{
if (i != ftvlist.Count - )
{
sb.Append(ftv.FieldValue + ",");
}
else
{
sb.Append(ftv.FieldValue);
}
}
else
{
if (i != ftvlist.Count - )
{
sb.Append("'" + ftv.FieldValue + "',");
}
else
{
sb.Append("'" + ftv.FieldValue + "'");
}
}
}
sb.Append(")");
return sb.ToString();
} /// /// 构造更新Update语句
/// ///表名
///字段list
///主键名
///主键值
///
public static string createUpdateSql(string tableName, List ftvlist, string pkName, string pkValue)
{
StringBuilder sb = new StringBuilder();
sb.Append(" update ");
sb.Append(tableName);
sb.Append(" set");
for (int i = ; i < ftvlist.Count; i++)
{
FieldTypeValue ftv = (FieldTypeValue)ftvlist[i];
if (i != ftvlist.Count - )
{
if (ftv.IsNum)
{
sb.Append(" " + ftv.FieldName + "=" + ftv.FieldValue + ",");
}
else
{
sb.Append(" " + ftv.FieldName + "='" + ftv.FieldValue + "',");
}
}
else
{
if (ftv.IsNum)
{
sb.Append(" " + ftv.FieldName + "=" + ftv.FieldValue + "");
}
else
{
sb.Append(" " + ftv.FieldName + "='" + ftv.FieldValue + "'");
}
}
}
sb.Append(" where " + pkName + "=" + pkValue);
return sb.ToString();
} /// /// 构造删除Delete语句
/// ///表名
///主键名
///主键值
///
public static string createDeleteSql(string tableName, string pkName, string pkValue)
{
StringBuilder sb = new StringBuilder();
sb.Append(" delete from ");
sb.Append(tableName);
sb.Append(" where " + pkName + " = '" + pkValue + "'");
return sb.ToString();
}
}
#endregion
} using System;
using System.Collections.Generic;
using System.Text; namespace MSCL
{
#region 使用示例
/*
List ftvlist = new List();
ftvlist.Add(new FieldTypeValue("ErrorDetail", "这是个错误"));
ftvlist.Add(new FieldTypeValue("ErrorFlag", "1"));
ftvlist.Add(new FieldTypeValue("ErrorRemark","这是个错误，我还没有处理"));
ftvlist.Add(new FieldTypeValue("ErrorTime", DateTime.Now.ToString()));
ftvlist.Add(new FieldTypeValue("OprationTime", DateTime.Now.ToString()));
//新增
string sql = MSCL.BuilderSql.createInsertSql("AFM_SysLog", ftvlist);
MSCL.SqlHelper.ExecSql(sql);
//修改
string sql = MSCL.BuilderSql.createUpdateSql("AFM_SysLog", ftvlist, "ErrorID", "166");
MSCL.SqlHelper.ExecSql(sql);
//删除
string sql = MSCL.BuilderSql.createDeleteSql("AFM_SysLog", "ErrorID", "166");
MSCL.SqlHelper.ExecSql(sql);
*/
#endregion #region 数据表字段类
/// /// 数据表字段类
/// public class FieldTypeValue
{
/// /// 字段容器
/// ///字段名
///字段值
///是否数字字段
public FieldTypeValue(string fieldName, string fieldValue, bool isNum)
{
this.fieldName = fieldName;
this.fieldValue = fieldValue;
this.isNum = isNum;
} /// /// 字段容器
/// ///字段名
///字段值
public FieldTypeValue(string fieldName, string fieldValue)
{
this.fieldName = fieldName;
this.fieldValue = fieldValue;
} private string fieldName;
/// /// 字段名
/// public string FieldName
{
get { return fieldName; }
set { fieldName = value; }
} private bool isNum = false;
/// /// 是否数字
/// public bool IsNum
{
get { return isNum; }
set { isNum = value; }
} private string fieldValue;
/// /// 字段值
/// public string FieldValue
{
get { return fieldValue; }
set { fieldValue = value; }
}
}
#endregion #region SQL语句的构造类
/// /// SQL语句的构造类
/// public class BuilderSql
{ /// /// 构造新增Insert语句
/// ///表名
///字段list
///
public static string createInsertSql(string tableName, List ftvlist)
{
StringBuilder sb = new StringBuilder();
sb.Append(" insert into ");
sb.Append(tableName);
sb.Append("(");
for (int i = ; i < ftvlist.Count; i++)
{
FieldTypeValue ftv = (FieldTypeValue)ftvlist[i];
if (i != ftvlist.Count - )
{
sb.Append(ftv.FieldName + ",");
}
else
{
sb.Append(ftv.FieldName);
}
}
sb.Append(") values(");
for (int i = ; i < ftvlist.Count; i++)
{
FieldTypeValue ftv = (FieldTypeValue)ftvlist[i];
if (ftv.IsNum)
{
if (i != ftvlist.Count - )
{
sb.Append(ftv.FieldValue + ",");
}
else
{
sb.Append(ftv.FieldValue);
}
}
else
{
if (i != ftvlist.Count - )
{
sb.Append("'" + ftv.FieldValue + "',");
}
else
{
sb.Append("'" + ftv.FieldValue + "'");
}
}
}
sb.Append(")");
return sb.ToString();
} /// /// 构造更新Update语句
/// ///表名
///字段list
///主键名
///主键值
///
public static string createUpdateSql(string tableName, List ftvlist, string pkName, string pkValue)
{
StringBuilder sb = new StringBuilder();
sb.Append(" update ");
sb.Append(tableName);
sb.Append(" set");
for (int i = ; i < ftvlist.Count; i++)
{
FieldTypeValue ftv = (FieldTypeValue)ftvlist[i];
if (i != ftvlist.Count - )
{
if (ftv.IsNum)
{
sb.Append(" " + ftv.FieldName + "=" + ftv.FieldValue + ",");
}
else
{
sb.Append(" " + ftv.FieldName + "='" + ftv.FieldValue + "',");
}
}
else
{
if (ftv.IsNum)
{
sb.Append(" " + ftv.FieldName + "=" + ftv.FieldValue + "");
}
else
{
sb.Append(" " + ftv.FieldName + "='" + ftv.FieldValue + "'");
}
}
}
sb.Append(" where " + pkName + "=" + pkValue);
return sb.ToString();
} /// /// 构造删除Delete语句
/// ///表名
///主键名
///主键值
///
public static string createDeleteSql(string tableName, string pkName, string pkValue)
{
StringBuilder sb = new StringBuilder();
sb.Append(" delete from ");
sb.Append(tableName);
sb.Append(" where " + pkName + " = '" + pkValue + "'");
return sb.ToString();
}
}
#endregion
} [csharp]
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data;
using System.Text;
using System.Data.SqlClient;
using MSCL; public partial class SQLDemo : System.Web.UI.Page
{
DbHelper db = new DbHelper();
protected void Page_Load(object sender, EventArgs e)
{ } //新增数据
protected void Button1_Click(object sender, EventArgs e)
{
List ftvlist = new List();
ftvlist.Add(new FieldTypeValue("[D_Name]", "测试用户" + DateTime.Now.ToString("yyyyMMddhhmmss")));
ftvlist.Add(new FieldTypeValue("[D_Password]", "测试密码" + DateTime.Now.ToString("yyyyMMddhhmmss")));
ftvlist.Add(new FieldTypeValue("[D_Else]", "测试备注" + DateTime.Now.ToString("yyyyMMddhhmmss")));
string sql = BuilderSql.createInsertSql("TestTable", ftvlist);
int opFlag = db.ExecuteNonQuery(db.GetSqlStringCommand(sql));
if (opFlag > ) { JsHelper.Alert("新增成功!", Page); } else { JsHelper.Alert("新增失败!", Page); };
} //修改数据
protected void Button2_Click(object sender, EventArgs e)
{
List ftvlist = new List();
ftvlist.Add(new FieldTypeValue("[D_Name]", "这是个错误dsadsadasd"));
ftvlist.Add(new FieldTypeValue("[D_Password]", "aaa这是个错误，我还没有处理"));
ftvlist.Add(new FieldTypeValue("[D_Else]", "aaa这是个错误，我还没有处理"));
string sql = BuilderSql.createUpdateSql("TestTable", ftvlist, "D_ID", "");
int opFlag = db.ExecuteNonQuery(db.GetSqlStringCommand(sql));
if (opFlag > ) { JsHelper.Alert("修改成功!", Page); } else { JsHelper.Alert("修改失败!", Page); };
} //删除数据
protected void Button3_Click(object sender, EventArgs e)
{
string sql = BuilderSql.createDeleteSql("[TestTable]", "[D_Id]", "");
int opFlag = db.ExecuteNonQuery(db.GetSqlStringCommand(sql));
if (opFlag > ) { JsHelper.Alert("删除成功!", Page); } else { JsHelper.Alert("删除失败!", Page); };
} //事务提交
protected void Button4_Click(object sender, EventArgs e)
{
using (Trans t = new Trans())
{
try
{
db.ExecuteNonQuery(db.GetSqlStringCommand("insert into TestTable(D_Name,D_Password,D_Else) values('aaaaa1','bbbbbb1','cccccc1')"), t);
db.ExecuteNonQuery(db.GetSqlStringCommand("insert into TestTable(D_Name,D_Password,D_Else) values('aaaaa2','bbbbbb2','cccccc2')"), t);
db.ExecuteNonQuery(db.GetSqlStringCommand("insert into TestTable(D_Name,D_Password,D_Else) values('aaaaa3','bbbbbb3','cccccc3')"), t);
db.ExecuteNonQuery(db.GetSqlStringCommand("insert into TestTable(D_Name,D_Password,D_Else) values('aaaaa4','bbbbbb4','cccccc4')"), t);
db.ExecuteNonQuery(db.GetSqlStringCommand("insert into TestTable(D_Name,D_Password,D_Else) values('aaaaa5','bbbbbb5','cccccc5')"), t);
t.Commit();
JsHelper.Alert("事务提交成功!", Page);
}
catch
{
t.RollBack();
JsHelper.Alert("事务提交失败!", Page);
}
}
} }
SQL SERVER C#数据库操作类(连接、执行SQL)
using System;
using System.Collections;
using System.Collections.Specialized;
using System.Data;
using System.Data.SqlClient;
using System.Configuration; namespace LiTianPing.SQLServerDAL //可以修改成实际项目的命名空间名称
{
/// <summary>
/// Copyright (C) 2004-2008 LiTianPing
/// 数据访问基础类(基于SQLServer)
/// 用户可以修改满足自己项目的需要。
/// </summary>
public abstract class DbHelperSQL
{
//数据库连接字符串(web.config来配置)
//<add key="ConnectionString" value="server=127.0.0.1;database=DATABASE;uid=sa;pwd=" />
protected static string connectionString = ConfigurationSettings.AppSettings["ConnectionString"];
public DbHelperSQL()
{
} #region 公用方法 public static int GetMaxID(string FieldName,string TableName)
{
string strsql = "select max(" + FieldName + ")+1 from " + TableName;
object obj = GetSingle(strsql);
if (obj == null)
{
return ;
}
else
{
return int.Parse(obj.ToString());
}
}
public static bool Exists(string strSql, params SqlParameter[] cmdParms)
{
object obj = 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 #region 执行简单SQL语句 /// <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)
{
using (SqlConnection connection = new SqlConnection(connectionString))
{
using (SqlCommand cmd = new SqlCommand(SQLString,connection))
{
try
{
connection.Open();
int rows=cmd.ExecuteNonQuery();
return rows;
}
catch(System.Data.SqlClient.SqlException E)
{
connection.Close();
throw new Exception(E.Message);
}
}
}
} /// <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 void ExecuteSqlTran(ArrayList SQLStringList)
{
using (SqlConnection conn = new SqlConnection(connectionString))
{
conn.Open();
SqlCommand cmd = new SqlCommand();
cmd.Connection=conn;
SqlTransaction tx=conn.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();
}
catch(System.Data.SqlClient.SqlException E)
{
tx.Rollback();
throw new Exception(E.Message);
}
}
}
/// <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 (SqlConnection connection = new SqlConnection(connectionString))
{
SqlCommand cmd = new SqlCommand(SQLString,connection);
System.Data.SqlClient.SqlParameter myParameter = new System.Data.SqlClient.SqlParameter ( "@content", SqlDbType.NText);
myParameter.Value = content ;
cmd.Parameters.Add(myParameter);
try
{
connection.Open();
int rows=cmd.ExecuteNonQuery();
return rows;
}
catch(System.Data.SqlClient.SqlException E)
{
throw new Exception(E.Message);
}
finally
{
cmd.Dispose();
connection.Close();
}
}
}
/// <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 (SqlConnection connection = new SqlConnection(connectionString))
{
SqlCommand cmd = new SqlCommand(strSQL,connection);
System.Data.SqlClient.SqlParameter myParameter = new System.Data.SqlClient.SqlParameter ( "@fs", SqlDbType.Image);
myParameter.Value = fs ;
cmd.Parameters.Add(myParameter);
try
{
connection.Open();
int rows=cmd.ExecuteNonQuery();
return rows;
}
catch(System.Data.SqlClient.SqlException E)
{
throw new Exception(E.Message);
}
finally
{
cmd.Dispose();
connection.Close();
}
}
} /// <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 (SqlConnection connection = new SqlConnection(connectionString))
{
using(SqlCommand cmd = new SqlCommand(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.SqlClient.SqlException e)
{
connection.Close();
throw new Exception(e.Message);
}
}
}
}
/// <summary>
/// 执行查询语句，返回SqlDataReader
/// </summary>
/// <param name="strSQL">查询语句</param>
/// <returns>SqlDataReader</returns>
public static SqlDataReader ExecuteReader(string strSQL)
{
SqlConnection connection = new SqlConnection(connectionString);
SqlCommand cmd = new SqlCommand(strSQL,connection);
try
{
connection.Open();
SqlDataReader myReader = cmd.ExecuteReader();
return myReader;
}
catch(System.Data.SqlClient.SqlException e)
{
throw new Exception(e.Message);
} }
/// <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 (SqlConnection connection = new SqlConnection(connectionString))
{
DataSet ds = new DataSet();
try
{
connection.Open();
SqlDataAdapter command = new SqlDataAdapter(SQLString,connection);
command.Fill(ds,"ds");
}
catch(System.Data.SqlClient.SqlException ex)
{
throw new Exception(ex.Message);
}
return ds;
}
} #endregion #region 执行带参数的SQL语句 /// <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 SqlParameter[] cmdParms)
{
using (SqlConnection connection = new SqlConnection(connectionString))
{
using (SqlCommand cmd = new SqlCommand())
{
try
{
PrepareCommand(cmd, connection, null,SQLString, cmdParms);
int rows=cmd.ExecuteNonQuery();
cmd.Parameters.Clear();
return rows;
}
catch(System.Data.SqlClient.SqlException E)
{
throw new Exception(E.Message);
}
}
}
} /// <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SqlParameter[]）</param>
public static void ExecuteSqlTran(Hashtable SQLStringList)
{
using (SqlConnection conn = new SqlConnection(connectionString))
{
conn.Open();
using (SqlTransaction trans = conn.BeginTransaction())
{
SqlCommand cmd = new SqlCommand();
try
{
//循环
foreach (DictionaryEntry myDE in SQLStringList)
{
string cmdText=myDE.Key.ToString();
SqlParameter[] cmdParms=(SqlParameter[])myDE.Value;
PrepareCommand(cmd,conn,trans,cmdText, cmdParms);
int val = cmd.ExecuteNonQuery();
cmd.Parameters.Clear(); trans.Commit();
}
}
catch
{
trans.Rollback();
throw;
}
}
}
} /// <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 SqlParameter[] cmdParms)
{
using (SqlConnection connection = new SqlConnection(connectionString))
{
using (SqlCommand cmd = new SqlCommand())
{
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.SqlClient.SqlException e)
{
throw new Exception(e.Message);
}
}
}
} /// <summary>
/// 执行查询语句，返回SqlDataReader
/// </summary>
/// <param name="strSQL">查询语句</param>
/// <returns>SqlDataReader</returns>
public static SqlDataReader ExecuteReader(string SQLString,params SqlParameter[] cmdParms)
{
SqlConnection connection = new SqlConnection(connectionString);
SqlCommand cmd = new SqlCommand();
try
{
PrepareCommand(cmd, connection, null,SQLString, cmdParms);
SqlDataReader myReader = cmd.ExecuteReader();
cmd.Parameters.Clear();
return myReader;
}
catch(System.Data.SqlClient.SqlException e)
{
throw new Exception(e.Message);
} } /// <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 SqlParameter[] cmdParms)
{
using (SqlConnection connection = new SqlConnection(connectionString))
{
SqlCommand cmd = new SqlCommand();
PrepareCommand(cmd, connection, null,SQLString, cmdParms);
using( SqlDataAdapter da = new SqlDataAdapter(cmd) )
{
DataSet ds = new DataSet();
try
{
da.Fill(ds,"ds");
cmd.Parameters.Clear();
}
catch(System.Data.SqlClient.SqlException ex)
{
throw new Exception(ex.Message);
}
return ds;
}
}
} private static void PrepareCommand(SqlCommand cmd,SqlConnection conn,SqlTransaction trans, string cmdText, SqlParameter[] 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 (SqlParameter parm in cmdParms)
cmd.Parameters.Add(parm);
}
} #endregion #region 存储过程操作 /// <summary>
/// 执行存储过程
/// </summary>
/// <param name="storedProcName">存储过程名</param>
/// <param name="parameters">存储过程参数</param>
/// <returns>SqlDataReader</returns>
public static SqlDataReader RunProcedure(string storedProcName, IDataParameter[] parameters )
{
SqlConnection connection = new SqlConnection(connectionString);
SqlDataReader returnReader;
connection.Open();
SqlCommand command = BuildQueryCommand( connection,storedProcName, parameters );
command.CommandType = CommandType.StoredProcedure;
returnReader = command.ExecuteReader();
return returnReader;
} /// <summary>
/// 执行存储过程
/// </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 RunProcedure(string storedProcName, IDataParameter[] parameters, string tableName )
{
using (SqlConnection connection = new SqlConnection(connectionString))
{
DataSet dataSet = new DataSet();
connection.Open();
SqlDataAdapter sqlDA = new SqlDataAdapter();
sqlDA.SelectCommand = BuildQueryCommand(connection, storedProcName, parameters );
sqlDA.Fill( dataSet, tableName );
connection.Close();
return dataSet;
}
} /// <summary>
/// 构建 SqlCommand 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>SqlCommand</returns>
private static SqlCommand BuildQueryCommand(SqlConnection connection,string storedProcName, IDataParameter[] parameters)
{
SqlCommand command = new SqlCommand( storedProcName, connection );
command.CommandType = CommandType.StoredProcedure;
foreach (SqlParameter parameter in parameters)
{
command.Parameters.Add( parameter );
}
return command;
} /// <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 (SqlConnection connection = new SqlConnection(connectionString))
{
int result;
connection.Open();
SqlCommand command = BuildIntCommand(connection,storedProcName, parameters );
rowsAffected = command.ExecuteNonQuery();
result = (int)command.Parameters["ReturnValue"].Value;
//Connection.Close();
return result;
}
} /// <summary>
/// 创建 SqlCommand 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>SqlCommand 对象实例</returns>
private static SqlCommand BuildIntCommand(SqlConnection connection,string storedProcName, IDataParameter[] parameters)
{
SqlCommand command = BuildQueryCommand(connection,storedProcName, parameters );
command.Parameters.Add( new SqlParameter ( "ReturnValue",
SqlDbType.Int,,ParameterDirection.ReturnValue,
false,,,string.Empty,DataRowVersion.Default,null ));
return command;
}
#endregion }
}