1     /// <summary>
 2     /// 倒计时类(发送验证码按钮，点击后，会倒计时60s，之后才能再次点击。不同界面的多个验证码按钮共享这个倒计时时间。)同一手机号码1分钟只能发1条；
 3     /// </summary>
 4     public static class CountDown
 5     {
 6         /// <summary>
 7         /// 倒计时60秒
 8         /// </summary>
 9         public static int stTimeCount = 0;
10       
11         /// <summary>
12         /// 倒计时60s方法
13         /// </summary>
14         /// <param name="btnCode"></param>
15         /// <param name="timeCount"></param>
16         public static void ShowCountDown(Button btnCode, int timeCount)
17         {
18             stTimeCount = timeCount;
19             DispatcherTimer dispatcherTimer = new DispatcherTimer();
20             dispatcherTimer.Interval = new TimeSpan(0, 0, 1);
21             dispatcherTimer.Start();
22             int count = stTimeCount;
23             int i = 0;
24             dispatcherTimer.Tick += delegate
25             {
26                 if (count > 0)
27                     count--;
28                 //倒计时:设置按钮的值,以及按钮不可点击
29                 btnCode.Content = count + " S ";
30                 btnCode.IsEnabled = false;
31                 stTimeCount = count;
32                 if (count == i)
33                 {
34                     //倒计时完成: 设置按钮的值,以及按钮可用
35                     dispatcherTimer.Stop();
36                     btnCode.Content = "获取验证码";
37                     btnCode.IsEnabled = true;
38                     stTimeCount = count ;
39                 }
40             };
41         }
42     }

 1     public SetLoginPwd()
 2         {
 3             this.InitializeComponent();
 4 
 5             //获取倒计时60秒是否有值,有值则继续倒计时
 6             if (CountDown.stTimeCount > 0)
 7             {
 8                 CountDown.ShowCountDown(btnCode, CountDown.stTimeCount);
 9             }
10         }