In C# how to get return value from stored procedure using ExecuteNonQuery

Question

I have the following query:

create proc [dbo].[DeleteParts] 
    @TransNo nvarchar (6), @fpart nvarchar(25) 
AS 
    DECLARE @Returns BIT 
    SET @Returns =         


        

Answer 1

You need a parameter with Direction set to ParameterDirection.ReturnValue

Something like:

SqlParameter returnParameter = deleteCommand.Parameters.Add("RetVal", SqlDbType.Int);
returnParameter.Direction = ParameterDirection.ReturnValue;
...
deleteCommand.ExecuteNonQuery();
...
int returnValue = (int) returnParameter.Value;

You Stored Procedure needs to return this return value of course:

create proc [dbo].[DeleteParts]      
    @TransNo nvarchar (6),   
    @fpart nvarchar(25)  
AS      
DECLARE @Returns BIT      
SET @Returns = 1     
...
RETURN @Returns