private void courseDeleteButton_Click(object sender, EventArgs e) { ob = new Gateway(); if (ob.DeleteEntireRowOfCourseTable(courseNoTextBox.Text) == 1) { MessageBox.Show("Deleted Successfully!"); courseResetButton_Click(sender, e); } else if (ob.DeleteEntireRowOfCourseTable(courseNoTextBox.Text) == 2) { MessageBox.Show("You will can not delete this foreign key item!"); } else { MessageBox.Show("Could not delete!"); } }