//生成六位随机数字
protected void BtnSave_Click(object sender, EventArgs e)
{
Random rd = new Random();
int a = rd.Next(5, 99999);
TxtNum.Text = string.Format("{0:00000}", a);// 001234
}
{
Random rd = new Random();
int a = rd.Next(5, 99999);
TxtNum.Text = string.Format("{0:00000}", a);// 001234
}