An SqlParameter with ParameterName '@UserId' is not contained by this SqlParameterCollection

Question

I had a login page. once user successfuly logged in, they can view and manage their profile/information. This would be done by retrieving data from database and display on a

Answer 1

Create a new SqlParameter and add it to the collection.

SqlParameter param = new SqlParameter("@UserId", currentUserId);
e.Command.Parameters.Add(param);