private void button2_Click(object sender, EventArgs e)
        {
            if (textBox1.Text.Trim() == "")
            {
                MessageBox.Show("请填写用户名!");
                return;
            }
            if (textBox2.Text.Trim() == "")
            {
                MessageBox.Show("请输入密码!");
                return;
            }
            if (textBox2.Text.Trim() != textBox3.Text.Trim())
            {
                MessageBox.Show("两次输入的密码不一致,请重新输入!");
                return;
            }

            String user_id, user_password, user_name, tel; int permissions;

            user_id       = textBox1.Text;
            user_password = textBox2.Text;
            permissions   = int.Parse(textBox4.Text);
            user_name     = textBox5.Text;
            tel           = textBox6.Text;
            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.insert_user1(user_id, user_password, user_name, tel);
            chloe_obj.insert_user2(user_id, permissions);
        }