private void button3_Click(object sender, EventArgs e) { String select_name2; select_name2 = comboBox5.SelectedValue.ToString(); chloe_control_all chloe_obj = new chloe_control_all("Data Source=DESKTOP-O4C25KM;Initial Catalog=场馆预约系统;Integrated Security=True"); chloe_obj.del_cd_note(select_name2); Note_qingli_Load(null, null); }