private void OnSubmitCompleted(SubmitOperation so)
 {
     UploadBusyIndicator.IsBusy = false;
     if (so.HasError)
     {
         MessageBox.Show(string.Format("Submit Failed: {0}", so.Error.Message));
         so.MarkErrorAsHandled();
     }
     else
     {
         MessageBox.Show("Submitted Successfully!");
         GetAcct_Ac_tblJournalAttachmentsByAcct_Ac_tblJournalQueryDataSource.Load();
     }
 }
        private void DeleteButton_Click(object sender, RoutedEventArgs e)
        {
            var Result = MessageBox.Show("آیا مطئنید؟", "اخطار", MessageBoxButton.OKCancel);

            if (Result == MessageBoxResult.OK)
            {
                var CurrentItem = AttachmentListBox.SelectedItem as Acct_Ac_tblJournalAttachments;
                GetAcct_Ac_tblJournalAttachmentsByAcct_Ac_tblJournalQueryDataSource.DataView.Remove(CurrentItem);
                GetAcct_Ac_tblJournalAttachmentsByAcct_Ac_tblJournalQueryDataSource.SubmitChanges();
            }
            else
            {
                MessageBox.Show("عملیات به درخواست کاربر لغو شد.");
            }
        }