.net 中关于两个时间的比较

 protected void Page_Load(object sender, EventArgs e)
    {
        if (!Page.IsPostBack)
        {
          string dates=DateDiff(Convert.ToDateTime(DateTime.Now.ToString("MM-dd-yyyy hh:mm:ss")),Convert.ToDateTime("09-07-2008 10:20:30"));
          Response.Write(Convert.ToDateTime(DateTime.Now.ToString("MM-dd-yyyy hh:mm:ss")));
          Response.Write(Convert.ToDateTime("09-07-2008 10:20:30"));
          Response.Write(dates);
        }
    }
    private string DateDiff(DateTime DateTime1, DateTime DateTime2)
    {
        string dateDiff = null;
        try
        {
            TimeSpan ts1 = new TimeSpan(DateTime1.Ticks);
            TimeSpan ts2 = new TimeSpan(DateTime2.Ticks);
            TimeSpan ts = ts1.Subtract(ts2).Duration();
            dateDiff = ts.Days.ToString() + "天"
                    + ts.Hours.ToString() + "小时"
                    + ts.Minutes.ToString() + "分钟"
                    + ts.Seconds.ToString() + "秒";
        }
        catch
        {

        }
        return dateDiff;
    }