Question

I’ve written the following C# code:

        abcEntities entities = new abcEntities();            
        abc_Lids_New newUserEntry = new abc_Lids_New()
        {
            Lid = lid,
            FName = fname,
            LName = lname,
            Phone = phone,
        };
        newUserEntry.abc_class_Assignments_New = new System.Data.Objects.DataClasses.EntityCollection<abc_class_Assignments_New>();
        foreach (string classId in classIds)
        {
            newUserEntry.abc_class_Assignments_New.Add(new abc_class_Assignments_New()
            {
                Lid = lid,
                classID = classId
            });
        }
        entities.abc_Lids_New.AddObject(newUserEntry);
        entities.SaveChanges();

The code is supposed to add a new row in abc_Lids_New representing a new user. The code is also supposed to add rows in abc_class_assignments_new corresponding to the user’s lid and a number of class ids.

However, I am getting an error: Unable to update the EntitySet 'UCV_TF_Assignments_New' because it has a DefiningQuery and no <InsertFunction> element exists in the <ModificationFunctionMapping> element to support the current operation.

Up until recently, I had only used the Entity Framework with stored procedures, so this is something new to me.

Answer 1

Your EntitySet “‘UCV_TF_Assignments_New” is either based on a View (in which case, you have to create the InsertFunction (stored procedure)) or it lacks a Primary Key (in which case, add one).