using System.Configuration;
using System.Data.SqlClient;
using System.Data; namespace ExamDAL
{
class SqHelper
{
#region 属性区 // 连接字符串
private static string strConn; public static string StrConn
{
get
{
return ConfigurationManager.ConnectionStrings["Exam"].ConnectionString;
}
} #endregion #region 方法区 #region 获取受影响的行数 /// 执行非查询存储过程和SQL语句
/// 增、删、改
/// </summary>
/// <param name="strSQL">要执行的SQL语句</param>
/// <param name="cmdType">Command类型</param>
/// <param name="paras">参数列表，没有参数填入null</param>
/// <returns>返回影响行数</returns>
public static int ExcuteSQL(string strSQL, CommandType cmdType, params SqlParameter[] paras)
{
int count = ;
using (SqlConnection conn = new SqlConnection(StrConn))
{
SqlCommand cmd = new SqlCommand(strSQL, conn);
cmd.CommandType = cmdType;
if (paras != null)
{
cmd.Parameters.AddRange(paras);
}
conn.Open();
count = cmd.ExecuteNonQuery();
conn.Close();
}
return count; } /// <summary>
/// 执行没有参数的SQL的语句
/// </summary>
/// <param name="strSQL">执行SQL</param>
/// <returns>受影响的行数</returns>
public static int ExcuteSQL(string strSQL)
{
return ExcuteSQL(strSQL, null);
} /// <summary>
/// 执行有参数的SQL的语句
/// </summary>
/// <param name="strSQL">执行SQL</param>
/// <param name="paras">参数</param>
/// <returns>受影响的行数</returns>
public static int ExcuteSQL(string strSQL, SqlParameter[] paras)
{
return ExcuteSQL(strSQL, CommandType.Text, paras);
} /// <summary>
/// 执行没有参数的存储过程
/// </summary>
/// <param name="ProcName">存储过程名称</param>
/// <returns>受影响的行数</returns>
public static int ExcuteProc(string ProcName)
{
return ExcuteSQL(ProcName, CommandType.StoredProcedure);
} /// <summary>
/// 执行有参数的存储过程
/// </summary>
/// <param name="ProcName">存储过程名称</param>
/// <param name="pars">参数</param>
/// <returns>受影响的行数</returns>
public static int ExcuteProc(string ProcName, SqlParameter[] pars)
{
return ExcuteSQL(ProcName, CommandType.StoredProcedure, pars);
} #endregion #region 获取第一行第一列的值 /// <summary>
/// 执行SQL语句，返回首行首列
/// </summary>
/// <param name="strSQL">要执行的SQL语句</param>
/// <param name="cmdtype">执行的类型</param>
/// <param name="paras">参数列表，没有参数填入null</param>
/// <returns>返回的首行首列</returns>
public static object GetObject(string strSQL, CommandType cmdtype, params SqlParameter[] paras)
{
object obj = null;
using (SqlConnection conn = new SqlConnection(StrConn))
{
SqlCommand cmd = new SqlCommand(strSQL, conn);
cmd.CommandType = cmdtype;
if (paras != null)
{
cmd.Parameters.AddRange(paras); } conn.Open();
obj = cmd.ExecuteScalar();
conn.Close();
}
return obj;
} /// <summary>
/// 根据sql语句获取单个值
/// </summary>
/// <param name="strSQL"></param>
/// <returns></returns>
public static object GetObject(string strSQL)
{
return GetObject(strSQL, null);
} /// <summary>
/// 根据sql语句 和 参数数组获取单个值
/// </summary>
/// <param name="strSQL"></param>
/// <param name="paras"></param>
/// <returns></returns>
public static object GetObject(string strSQL, SqlParameter[] paras)
{
return GetObject(strSQL, CommandType.Text, paras);
} /// <summary>
/// 调用不带参数的存储过程获取单个值
/// </summary>
/// <param name="ProcName"></param>
/// <returns></returns>
public static object GetObjectByProc(string ProcName)
{
return GetObjectByProc(ProcName);
} /// <summary>
/// 调用带参数的存储过程获取单个值
/// </summary>
/// <param name="ProcName"></param>
/// <param name="paras"></param>
/// <returns></returns>
public static object GetObjectByProc(string ProcName, params SqlParameter[] paras)
{
return GetObject(ProcName, CommandType.StoredProcedure, paras);
} #endregion #region 获取DataReader /// <summary>
/// 根据sql语句返回DataReader对象
/// </summary>
/// <param name="strSQL">sql语句</param>
/// <returns>DataReader对象</returns>
public static SqlDataReader GetReader(string strSQL)
{
return GetReader(strSQL, null);
} /// <summary>
/// 根据sql语句和参数返回DataReader对象
/// </summary>
/// <param name="strSQL">sql语句</param>
/// <param name="paras">参数数组</param>
/// <returns>DataReader对象</returns>
public static SqlDataReader GetReader(string strSQL, params SqlParameter[] paras)
{
return GetReader(strSQL, CommandType.Text, paras);
} /// <summary>
/// 调用不带参数的存储过程，返回DataReader对象
/// </summary>
/// <param name="procName">存储过程名称</param>
/// <returns>DataReader对象</returns>
public static SqlDataReader GetReaderByProc(string procName)
{
return GetReaderByProc(procName);
} /// <summary>
/// 调用带有参数的存储过程，返回DataReader对象
/// </summary>
/// <param name="procName">存储过程名</param>
/// <param name="paras">参数数组</param>
/// <returns>DataReader对象</returns>
public static SqlDataReader GetReaderByProc(string procName, params SqlParameter[] paras)
{
return GetReader(procName, CommandType.StoredProcedure, paras);
} /// <summary>
/// 查询SQL语句获取DataReader
/// </summary>
/// <param name="strSQL">查询的SQL语句</param>
/// <param name="cmdtype">执行类型</param>
/// <param name="paras">参数列表，没有参数填入null</param>
/// <returns>查询到的DataReader（关闭该对象的时候，自动关闭连接）</returns>
public static SqlDataReader GetReader(string strSQL, CommandType cmdtype, params SqlParameter[] paras)
{
SqlDataReader sqldr = null;
SqlConnection conn = new SqlConnection(StrConn);
SqlCommand cmd = new SqlCommand(strSQL, conn);
cmd.CommandType = cmdtype;
if (paras != null)
{
cmd.Parameters.AddRange(paras);
}
conn.Open();
//CommandBehavior.CloseConnection的作用是如果关联的DataReader对象关闭，则连接自动关闭
sqldr = cmd.ExecuteReader(CommandBehavior.CloseConnection);
return sqldr;
} #endregion #region 获取DataTable /// <summary>
/// 执行查询，返回DataTable对象
/// </summary>
/// <param name="strSQL">sql语句</param>
/// <param name="cmdtype">Command类型</param>
/// <param name="paras">参数数组</param>
/// <returns>DataTable对象</returns>
public static DataTable GetTable(string strSQL, CommandType cmdtype, params SqlParameter[] paras)
{
DataTable dt = new DataTable(); ;
using (SqlConnection conn = new SqlConnection(StrConn))
{
SqlDataAdapter da = new SqlDataAdapter(strSQL, conn);
da.SelectCommand.CommandType = cmdtype;
if (paras != null)
{
da.SelectCommand.Parameters.AddRange(paras);
}
da.Fill(dt);
}
return dt;
} /// <summary>
/// 执行无参数语句
/// </summary>
/// <param name="strSQL">执行SQL</param>
/// <returns>DataTable</returns>
public static DataTable GetTable(string strSQL)
{
return GetTable(strSQL, null);
} /// <summary>
/// 执行有参语句
/// </summary>
/// <param name="strSQL">执行SQL</param>
/// <param name="paras">参数数组</param>
/// <returns>DataTable</returns>
public static DataTable GetTable(string strSQL, params SqlParameter[] paras)
{
return GetTable(strSQL, CommandType.Text, paras);
} #endregion #region 获取DataSet /// <summary>
/// 执行查询，返回DataSet对象
/// </summary>
/// <param name="strSQL">sql语句</param>
/// <param name="cmdtype">Command类型</param>
/// <param name="paras">参数数组</param>
/// <returns>DataSet对象</returns>
public static DataSet GetDataSet(string strSQL, CommandType cmdtype, params SqlParameter[] paras)
{
DataSet dt = new DataSet(); ;
using (SqlConnection conn = new SqlConnection(StrConn))
{
SqlDataAdapter da = new SqlDataAdapter(strSQL, conn);
da.SelectCommand.CommandType = cmdtype;
if (paras != null)
{
da.SelectCommand.Parameters.AddRange(paras);
}
da.Fill(dt);
}
return dt;
} /// <summary>
/// 执行无参数的SQL
/// </summary>
/// <param name="strSQL">执行SQL</param>
/// <returns>DataSet</returns>
public static DataSet GetDataSet(string strSQL)
{
return GetDataSet(strSQL, null);
} /// <summary>
/// 执行有参数的SQL
/// </summary>
/// <param name="strSQL">执行SQL</param>
/// <param name="paras">参数数组</param>
/// <returns>DataSet</returns>
public static DataSet GetDataSet(string strSQL, SqlParameter[] paras)
{
return GetDataSet(strSQL, CommandType.Text, paras);
} #endregion #region 批量插入数据处理 /// <summary>
/// 往数据库中批量插入数据
/// </summary>
/// <param name="sourceDt">数据源表</param>
/// <param name="targetTable">服务器上目标表</param>
public static void BulkToDB(DataTable sourceDt, string targetTable)
{
SqlConnection conn = new SqlConnection(strConn);
SqlBulkCopy bulkCopy = new SqlBulkCopy(conn); //用其它源的数据有效批量加载sql server表中
bulkCopy.DestinationTableName = targetTable; //服务器上目标表的名称
bulkCopy.BatchSize = sourceDt.Rows.Count; //每一批次中的行数 try
{
conn.Open();
if (sourceDt != null && sourceDt.Rows.Count != )
bulkCopy.WriteToServer(sourceDt); //将提供的数据源中的所有行复制到目标表中
}
catch (System.Exception ex)
{
throw ex;
}
finally
{
conn.Close();
if (bulkCopy != null)
bulkCopy.Close();
} } #endregion #endregion
}
}