private void OnModifyJournalClick(object sender, RoutedEventArgs e) { try { Librarian lib = (Librarian)SDM.CurrentUser; int price = Convert.ToInt32(PriceTB.Text); int quantity = Convert.ToInt32(CopiesTB.Text); lib.ModifyJournal ( _docID, TitleTB.Text, AutorsTB.Text, PublishedInTB.Text, IssueTitleTB.Text, IssueEditorTB.Text, price, quantity, TagsTB.Text ); } catch { MessageBox.Show("The row is empty", "Error"); } prevPage.UpdateTable(); Close(); }