如何捕捉SQLServer的超时异常 [英] How to catch SQLServer timeout exceptions

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问题描述

我需要专门捕获SQL服务器超时异常,以便他们可以不同的方式处理。我知道我能赶上SQLException中,然后检查如果消息字符串包含超时,但不知道是否有更好的方法来做到这一点?

 尝试
{
    //一些code
}
赶上(SQLEXCEPTION前)
{

    如果(ex.Message.Contains(超时))
    {
         //处理超时
    }
    其他
    {
         扔;
    }
}
 

解决方案

要检查是否有超时,我相信你检查ex.Number的价值。如果是-2,那么你有一个超时的情况。

-2是错误$ C $下超时,从DBNETLIB,MDAC的驱动程序,SQL Server返回。这可以通过下载反射,并期待下System.Data.SqlClient.TdsEnums的TIMEOUT_EXPIRED可见。

您code应改为:

 如果(ex.Number == -2)
{
     //处理超时
}
 

code证明失败:

 尝试
{
    SqlConnection的SQL =新的SqlConnection(@网络图书馆= DBMSSOCN;数据源= YourServer 1433;初始目录= YourDB;集成安全性= SSPI;);
    sql.Open();

    的SqlCommand CMD = sql.CreateCommand();
    cmd.CommandText =DECLARE @i INT WHILE EXISTS(SELECT 1,从系统对象)首先,选择@i = 1 END;
    cmd.ExecuteNonQuery(); //此行会超时。

    cmd.Dispose();
    sql.Close();
}
赶上(SQLEXCEPTION前)
{
    如果(ex.Number == -2){
        Console.WriteLine(超时发生了);
}
 

I need to specifically catch SQL server timeout exceptions so that they can be handled differently. I know I could catch the SqlException and then check if the message string Contains "Timeout" but was wondering if there is a better way to do it?

try
{
    //some code
}
catch (SqlException ex)
{

    if (ex.Message.Contains("Timeout"))
    {
         //handle timeout
    }
    else
    {
         throw;
    }
}

解决方案

To check for a timeout, I believe you check the value of ex.Number. If it is -2, then you have a timeout situation.

-2 is the error code for timeout, returned from DBNETLIB, the MDAC driver for SQL Server. This can be seen by downloading Reflector, and looking under System.Data.SqlClient.TdsEnums for TIMEOUT_EXPIRED.

Your code would read:

if (ex.Number == -2)
{
     //handle timeout
}

Code to demonstrate failure:

try
{
    SqlConnection sql = new SqlConnection(@"Network Library=DBMSSOCN;Data Source=YourServer,1433;Initial Catalog=YourDB;Integrated Security=SSPI;");
    sql.Open();

    SqlCommand cmd = sql.CreateCommand();
    cmd.CommandText = "DECLARE @i int WHILE EXISTS (SELECT 1 from sysobjects) BEGIN SELECT @i = 1 END";
    cmd.ExecuteNonQuery(); // This line will timeout.

    cmd.Dispose();
    sql.Close();
}
catch (SqlException ex)
{
    if (ex.Number == -2) {
        Console.WriteLine ("Timeout occurred");
}

这篇关于如何捕捉SQLServer的超时异常的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!

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