Question

I have a SQL Server 2008 stored procedure (pseudocode below) that goes as follows:

CREATE PROCEDURE MyProc
AS
BEGIN

 CREATE DummyTable

 INSERT INTO DummyTable
 SELECT xxx

 INSERT INTO DummyTable
 SELECT yyy

 IF EXISTS FinalTable DROP FinalTable

 EXEC sp_RENAME 'DummyTable', 'FinalTable'

END
GO

Note that there is no return type/value for this stored proc. I have this stored proc mapped in my LINQ-TO-SQL designer (ASP.NET MVC2 application). However, when I call the method as follows:

using (MyContext context = new MyContext())
{
 context.MyProc();
}

However, in my logs, I have found that this exception is being generated when this method is run:

System.InvalidOperationException:
‘System.Void’ is not a valid return
type for a mapped stored procedure
method. at
System.Data.Linq.SqlClient.QueryConverter.TranslateStoredProcedureCall(MethodCallExpression
mce, MetaFunction function) at
System.Data.Linq.SqlClient.QueryConverter.VisitMappedFunctionCall(MethodCallExpression
mc) at
System.Data.Linq.SqlClient.QueryConverter.VisitMethodCall(MethodCallExpression
mc) at
System.Data.Linq.SqlClient.QueryConverter.VisitInner(Expression
node) at
System.Data.Linq.SqlClient.QueryConverter.ConvertOuter(Expression
node) at
System.Data.Linq.SqlClient.SqlProvider.BuildQuery(Expression
query, SqlNodeAnnotations annotations)
at
System.Data.Linq.SqlClient.SqlProvider.System.Data.Linq.Provider.IProvider.Execute(Expression
query) at
System.Data.Linq.DataContext.ExecuteMethodCall(Object
instance, MethodInfo methodInfo,
Object[] parameters)

Can anyone help me identify why this exception is being generated?

Thanks,
A.

UPDATED: The auto generated code in the L2S designer file is:

[global::System.Data.Linq.Mapping.FunctionAttribute(Name="dbo.MyProc")]
public void MyProc()
{
 this.ExecuteMethodCall(this, ((MethodInfo)(MethodInfo.GetCurrentMethod())));
}

Answer 1

Guys just to let you know I set nocount on and this sorted the problem!

I had to re-add my sp in designer mode.