Entity Framework Return Value from Stored Procedure - Getting Error

"dontspammenow@yahoo.com" <dontspammenow@yahoo.com>
Sun, 27 Sep 2009 16:41:39 -0700 (PDT)

I'm attempting to use the Entity Framework for data access, but I'm
running into a few issues with stored procedures. (VS 2008 SP1, 3.5
Framework SP1, SQL Server 2008)

I imported this stored procedure into the framework diagram and then
made it a function import. The stored procedure returns a value.

CREATE PROCEDURE SignOn(@UserName nvarchar(30) = '', @Password nvarchar
(30) = '')
    -- SET NOCOUNT ON added to prevent extra result sets from
    -- interfering with SELECT statements.



    -- Insert statements for procedure here
    FROM Ind A
    WHERE A.UserName = @UserName
    and CONVERT(nvarchar, DecryptByKey(A.Password)) = @Password;

    IF @COUNT > 0
            RETURN 1;
            RETURN 0;


The first thing I noticed is that the stored proc (annoyingly) wasn't
added to the EntityFramework context, so it looked like I had to write
my own method to call the stored proc that wasn't outputting data into
one of the EntityFramework table fields that I defined on my
diagram. So I added a method (below) to the Entity Framework's auto-
generated class to handle the call, but then decided this wasn't such
a great idea because if I had to refresh the diagram, the auto-gen
class got regenerated and wiped out anything I added to it. So I
ended up extending the auto-gen class with this method in another

A few problems:

1.) The parameter names do not allow "@" sign in front of them, so I
can't match them to the stored proc parameter names. (Does it even

2.) On the ExecuteNonQuery, I'm getting this error:

        The data reader returned by the store data provider does not
have enough columns for the query requested.

So how do I get the return value from the stored proc?

public static class modelext

    public static Int64 login(this AMModel.AMEntities md, string
username, string password)

        using (EntityConnection connection = new EntityConnection


            EntityCommand command = connection.CreateCommand();

            command.CommandText = "AMEntities.SignOn";

            command.CommandType =

            EntityParameter user = command.Parameters.Add("UserName",
            user.Direction = ParameterDirection.Input;
            user.Value = username;

            EntityParameter pass = command.Parameters.Add("Password",
            pass.Direction = ParameterDirection.Input;
            pass.Value = password;

            EntityParameter rtnval = command.Parameters.Add
            rtnval.Direction = ParameterDirection.ReturnValue;







            Int64 returnValue = (Int64)command.Parameters

            return returnValue;




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