从 C# Windows 应用程序调用存储过程的错误结果

Question

I have a weird issue that I don't know where to begin to look to try to resolve it. I am writing a Windows application with a SQL Server back end. I've written a stored procedure that the application calls and then outputs the results into an Excel spreadsheet.

The issue is, one column's values are wrong. This column is a SUM value where the sum is done in the stored procedure. The weird thing is when I run the procedure in SQL Server Management Studio, the value returns correctly. When I call the same procedure from my Windows app, the values are wrong. They are somewhat in the ballpark but wrong. Note that there are 14 columns returned and the other 13 are correct so I think it has to do with the aggregate function.

I've stepped through the code to see the values starting with the 'while(reader.Read())' loop and can see that values are wrong before they are put into the spreadsheet. Why are they correct in SQL but not in the Windows app? It's the same code running. Very weird.

If anybody has any thoughts on this I would appreciate them. If it would help to post some code I'm happy to do that.

Thanks in advance.

Answer 1

You can try to execute the stored procedure with SqlAdapter to return a data set and check if the data type of the Aggregated(SUM) column is equivalent to the return type from the DataReader that you had a problem with.