ajak timer

 DateTime dt_Sports = Convert.ToDateTime("2012 - 12 - 21");
        lblDate.Text = dt_Sports.Subtract(DateTime.Now).ToString();
        string[] dd = lblDate.Text.Split('.');
        lblDate.Text = "距离<b>北京奥运会开幕</b>还有　：　" + dd[0] + "　天　" + dd[1] + "　分　";