Question

How do we return a value from a stored procedure

here is my sp looks like:

create proc dbo.spInsertGroup
@ID uniqueidentifier
@GroupName varchar(100),
@IsActive bit
AS
BEGIN



insert into tblGroup
values(@ID, @GroupName, @IsActive)

Select @@IDENTITY AS ID

END

based on the return value i want to show the user some kind of feedback wether the save was successfull or failed.

public void AddInquiry(Inquiry inq)
{
   using (var transaction = new TransactionScope())
   {
      using (MyDataContext dc = conn.GetContext())
      {
         var results =  dc.spInquiry_Insert(......).ToList();

         transaction.Complete();

         var returnValue = (int)results.ReturnValue; 
         // note that ReturnValue is of type object and must be cast. 
      }
   }
}

error:

Error 39 ‘System.Collections.Generic.List’
does not contain a definition for
‘ReturnValue’ and no extension method
‘ReturnValue’ accepting a first
argument of type
‘System.Collections.Generic.List’
could be found (are you missing a
using directive or an assembly
reference?)

Answer 1

try:

using (MyDataContext dc = conn.GetContext())
{
    var returnValue = (int)dc.spInsertGroup(.......).ReturnValue;
}

You are getting that error because you are calling the .ToList() so the var results is of type List<> that has no ReturnValue property.

If you can’t see the ReturnValue property, maybe you need to update the method generated by LINQ