Throw exceptions in SQL and C#

This is how we can throw an exception in C#;

static void CopyObject(SampleClass original)
{
    if (original == null)
    {
        throw new System.ArgumentException("Parameter cannot be null", "original");
    }
}

This is how we can throw an exception in SQL;

BEGIN TRY
	SET NOCOUNT ON;

	SELECT 1/0;

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;  
    THROW;
END CATCH;  

If you don’t want to throw exception, comment “THROW” keyword. This will stop propagating exception to calling method and “catch(SqlException ex)” block will never be able to see it.

Uncomment all other lines. You have to use data reader to get result back and handle exception manually.

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