Question

存储过程：

Procedure GetLocalConfig
(
    @ConfigId int
)
AS
SET NOCOUNT ON; 
BEGIN TRY
BEGIN TRANSACTION
SELECT 1/0
COMMIT TRANSACTION;
END TRY
BEGIN CATCH
    SELECT 
    ERROR_NUMBER() AS ErrorNumber
    ,ERROR_SEVERITY() AS ErrorSeverity
    ,ERROR_STATE() AS ErrorState
    ,ERROR_PROCEDURE() AS ErrorProcedure
    ,ERROR_LINE() AS ErrorLine
    ,ERROR_MESSAGE() AS ErrorMessage;  


     IF @@TRANCOUNT > 0
        ROLLBACK TRANSACTION;
        RETURN 
END CATCH

。调用存储过程的网络代码：

try
{
return DatabaseFactory.CreateDatabase(ConnectionStringConfigName)
       .ExecuteSprocAccessor(DbCommands.GetLocalConfig, new LocalConfigDtoMapper(), configId)
       .Single();

}
catch (Exception ex)
{
   // Exception : Sequence contains no elements???
}

如果我从SSMS执行此SP，我会得到实际的异常：

ErrorNumber ErrorSeverity ErrorState  ErrorProcedure ErrorLine   ErrorMessage
8134        16            1           GetLocalConfig 54           Divide by zero error encountered.

我想在.Net的try catch块中看到这个异常但是我一直在让Sequence不包含任何元素。

经过一些研究后，我发现我可以在我的存储过程中使用RAISEERROR试试catch块：

DECLARE @errnum nchar(5), @errmsg nvarchar(2048);
SELECT
   @errnum = RIGHT('00000' + ERROR_NUMBER(), 5),
   @errmsg = @errnum + ' ' + ERROR_MESSAGE();
RAISERROR (@errmsg, 16, 1);

现在，当我使用SSMS运行SP时，我得到：