private void Window_Loaded(object sender, RoutedEventArgs e) { ProveedorBLL ingBLL = new ProveedorBLL(); DataTable dt = ingBLL.getallBebi(); cmb_proveedor.ItemsSource = dt.DefaultView; cmb_proveedor.DisplayMemberPath = "NOMBRE_PROVEEDOR"; cmb_proveedor.SelectedValuePath = "ID_PROVEEDOR"; }