每隔一秒获取时间

private DispatcherTimer ShowTimer;//系统时间
ShowTimer = new System.Windows.Threading.DispatcherTimer();
ShowTimer.Tick += new EventHandler(ShowCurTimer);//起个Timer一直获取当前时间
  ShowTimer.Interval = new TimeSpan(0, 0, 0, 1, 0);
 ShowTimer.Start();


       public void ShowCurTimer(object sender, EventArgs e)
        {
            //"星期"+DateTime.Now.DayOfWeek.ToString(("d"))
            //获得星期几
            this.Tt.Text = DateTime.Now.ToString("yyyy年MM月dd日");
            this.Tt.Text += " ";
            //获得年月日

            this.Tt.Text += DateTime.Now.ToString("dddd", new System.Globalization.CultureInfo("zh-cn"));   //yyyy年MM月dd日
            this.Tt.Text += " ";
            //获得时分秒
            this.Tt.Text += DateTime.Now.ToString("HH:mm:ss");
            //System.Diagnostics.Debug.Print("this.ShowCurrentTime {0}", this.ShowCurrentTime);
}