Question

让我们考虑以下通过odbc驱动程序连接sql server的连接字符串

"Driver={SQL Server Native Client 10.0};Server=xxx.xx.xx.xx,xxxx;Database=mydata;Uid=xx;Pwd=xxxxxx;"

数据库类型：Sql server

驱动程序：sql server-ODBC native client 10.0

提供者类型：System.Data.Odbc

我在其中通过odbc连接执行50个命令......

在连接字符串1中的前50个和连接字符串2中的其余25中。

有

当我执行那些命令时，大约35个命令执行得很好，之后我得到了错误

ERROR [HY000] [Microsoft][SQL Server Native Client 10.0]Unspecified error occurred on SQL Server. Connection may have been terminated by the server.

用于休息之后执行的所有查询和

堆栈跟踪：

  at System.Data.Odbc.OdbcConnection.HandleError(OdbcHandle hrHandle, RetCode retcode)
   at System.Data.Odbc.OdbcCommand.ExecuteReaderObject(CommandBehavior behavior, String method, Boolean needReader, Object[] methodArguments, SQL_API odbcApiMethod)
   at System.Data.Odbc.OdbcCommand.ExecuteReaderObject(CommandBehavior behavior, String method, Boolean needReader)
   at System.Data.Odbc.OdbcCommand.ExecuteNonQuery()
   at testprovision.CommonDAL.ExecuteNonQuery(String connectionString, CommandType cmdType, String cmdText, OdbcParameter[] commandParameters) in

执行我使用的非查询循环代码是

public static int ExecuteNonQuery(string connectionString, CommandType cmdType, string cmdText, params OdbcParameter[] commandParameters)
{
    int val = 0;
    OdbcCommand cmd = new OdbcCommand();
    try
    {
       using (OdbcConnection conn = new OdbcConnection(connectionString))
       {
           CommonCommand(cmd, conn, null, cmdType, cmdText, commandParameters);
           val = cmd.ExecuteNonQuery();
           cmd.Parameters.Clear();
           conn.Close();
        }
    }
    catch (Exception ex)
    {
    }
    finally
    {
        cmd.Dispose();
    }
    return val;
}

我现在要做的就是解决问题

等待您的回复..

Answer 1

所以你在CommonCommand中打开conn？
在我看来，这是一种不好的做法在一个地方打开和关闭。
现在如果ExecuteNonQuery（）;失败它去了Catch并且conn没有关闭。

尝试这种模式

OdbcConnection conn = new OdbcConnection(connectionString);
try
{
   conn.Open();
   using (OdbcCommand cmd = conn.CreateCommand)
   {
       // do NOT have CommonCommand open the connection.  
       // change CommonCommand to not even pass the connection
       CommonCommand(cmd, null, cmdType, cmdText, commandParameters);
       val = cmd.ExecuteNonQuery();
       // cmd.Parameters.Clear();   
       // don't need to clear or dipose it will do so when it falls out of scope     
   }
}
catch (Exception ex)
{
}
finally
{
    conn.Close();
}

在.net sql server中运行多个查询时出错

1 个答案: