private void OnAddJournalClick(object sender, RoutedEventArgs e) { Librarian currentUser = (Librarian)SDM.CurrentUser; int price = Convert.ToInt32(PriceTB.Text); int quantity = Convert.ToInt32(CopiesTB.Text); currentUser.AddJournal ( TitleTB.Text, AutorsTB.Text, PublishedInTB.Text, IssueTitleTB.Text, IssueEditorTB.Text, price, quantity, TagsTB.Text ); _previousPage.UpdateTable(); Close(); }