如何捕获 SQLServer 超时异常 [英] How to catch SQLServer timeout exceptions
问题描述
我需要专门捕获 SQL 服务器超时异常,以便可以不同地处理它们.我知道我可以捕获 SqlException,然后检查消息字符串是否包含超时",但想知道是否有更好的方法来做到这一点?
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;
}
}
推荐答案
要检查超时,我相信您检查 ex.Number 的值.如果它是-2,那么你有一个超时情况.
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 是超时的错误代码,从 SQL Server 的 MDAC 驱动程序 DBNETLIB 返回.这可以通过下载 Reflector 并在 System.Data.SqlClient.TdsEnums 下查看来查看对于 TIMEOUT_EXPIRED.
-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.
您的代码将显示为:
if (ex.Number == -2)
{
//handle timeout
}
证明失败的代码:
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");
}
}
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