//DELETE BOOK BY ID private void bookDeleteIDButton_Click(object sender, EventArgs e) { int ID = Convert.ToInt32(idDeleteUpDown1.Value); string newBookTitle = titleTextBox.Text; string newBookAuthor = authorTextBox.Text; string deleteFromIndex = choseTablecomboBox1.SelectedItem.ToString().ToLower(); int deleteWhatIndex = bookDeleteComboBox.SelectedIndex; DBItems.Initialize(); DBItems.deleteFromTable(ID, newBookTitle, newBookAuthor, deleteWhatIndex, deleteFromIndex); switch (deleteFromIndex) { case "book": this.bookTableAdapter.Fill(this.libraryDataSet.book); break; case "journal": this.journalTableAdapter.Fill(this.libraryDataSet.journal); break; case "patent": this.patentTableAdapter.Fill(this.libraryDataSet.patent); break; case "conference": this.conferenceTableAdapter.Fill(this.libraryDataSet.conference); break; } }