private void button3_Click(object sender, EventArgs e) { if (delCombo.SelectedItem == null) { MessageBox.Show("Please select a department."); return; } //Изпраща се завката за изтриване if (!DBConnection.DeleteDepByName(delCombo.SelectedItem.ToString())) { MessageBox.Show("There is a problem with deleting that department! Maybe that department doesn't exist in the database. :("); } else { MessageBox.Show("The department is deleted successfully!"); } //Премахва се от листбокса и от комбото depListB.Items.RemoveAt(delCombo.SelectedIndex); delCombo.Items.RemoveAt(delCombo.SelectedIndex); }