private void button1_Click(object sender, EventArgs e)
{
int userFind_result;
chloe_control_all chloe_obj = new chloe_control_all("Data Source=DESKTOP-O4C25KM;Initial Catalog=场馆预约系统;Integrated Security=True");
userFind_result = chloe_obj.username_find(textBox1.Text);
if (userFind_result == 0)
{
MessageBox.Show("该用户名可以使用！");
}
else if (userFind_result == 1)
{
MessageBox.Show("该用户名已被注册，请重新输入");
}
}