private void button1_Click(object sender, EventArgs e)
{
String select_book_id;
select_book_id = comboBox1.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.gly_del_booking(select_book_id);
GLY_yiyuyue_Load(null, null);
}