web config 配置
<connectionStrings>
<add name="SQLConnString" connectionString="Data Source=数据库账号;Initial Catalog=数据库;User Id=用户名;password=密码" providerName="System.Data.SqlClient" />
</connectionStrings>
string connectionString = ConfigurationManager.ConnectionStrings["SQLConnString"].ToString();//连接字符串
SqlConnection cn = new SqlConnection(connectionString);//数据库连接
string sql = "select cameraId,cameraName,cameraNo,defence,deviceId,deviceName,deviceSerial,isEncrypt,isShared,picUrl,status,videoLevel from Video";
var dataset = Query(sql, connectionString);
var lstVideo = DataSetToIList<camera.VideoList>(dataset, 0);
/// <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, string connectionString)
{
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 E)
{
throw new Exception(E.Message);
// ITNB.Base.Error.showError(E.Message.ToString());
}
return ds;
}
} /// <summary>
/// DataSet装换为泛型集合
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="p_DataSet">DataSet</param>
/// <param name="p_TableIndex">待转换数据表索引</param>
/// <returns></returns>
public static List<T> DataSetToIList<T>(DataSet p_DataSet, int p_TableIndex)
{
if (p_DataSet == null || p_DataSet.Tables.Count < 0)
return null;
if (p_TableIndex > p_DataSet.Tables.Count - 1)
return null;
if (p_TableIndex < 0)
p_TableIndex = 0; DataTable p_Data = p_DataSet.Tables[p_TableIndex];
// 返回值初始化
List<T> result = new List<T>();
for (int j = 0; j < p_Data.Rows.Count; j++)
{
T _t = (T)Activator.CreateInstance(typeof(T));
PropertyInfo[] propertys = _t.GetType().GetProperties();
foreach (PropertyInfo pi in propertys)
{
for (int i = 0; i < p_Data.Columns.Count; i++)
{
// 属性与字段名称一致的进行赋值 (枚举类型无法转换，单独拎出来)
if (pi.Name.Equals(p_Data.Columns[i].ColumnName))
{
// 数据库NULL值单独处理
if (p_Data.Rows[j][i] != DBNull.Value)
pi.SetValue(_t, p_Data.Rows[j][i], null);
else
pi.SetValue(_t, null, null);
break;
}
}
}
result.Add(_t);
}
return result;
}