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);
}