绑定与ORM关联的两个绑定源

Question

I have form with DataGridView. This datagrid use this binding:

        clientBindingSource.DataSource = from asd in db.Clients select new MainGridHelper()
            {
                Client = asd
            };

MainGridHelper have some properties and useful methods. But then I add new client from another form:

        _client = new Client();
        clientBindingSource.DataSource = _client;
        //...
        DBContext.Clients.InsertOnSubmit(_client);
        DBContext.SubmitChanges();

So, I use DataGridView.Refresh() after add client. I have new null Client in first BindingSource, but row added (empty cells). I dont want merge MainGridHelper and Clients classes. How I can fix this without new LINQ query?

Sorry, if it is an easy question.

Answer 1

If I understand your question correctly (and that's a big if), just adjust the original LINQ query to exclude the nulls:

clientBindingSource.DataSource = from asd in db.Clients 
                                 where asd != null
                                 select new MainGridHelper()
        {
            Client = asd
        };