有人可以向我解释这是什么吗？

Question

所以，我对C＃编程颇为陌生，我有一位朋友帮助我。他做了这样的代码：

private void Form1_Shown(object sender, EventArgs e) 
    { 
     System.Timers.Timer t = new System.Timers.Timer(50); 

     t.Elapsed += t_Elapsed; 

     t.Start(); 
    } 

    void t_Elapsed(object sender, System.Timers.ElapsedEventArgs e) 
    { 
     ((System.Timers.Timer)sender).Stop(); 

     DisplayOrder(); 
    } 

这是用来暂停程序一段短暂的时间，然后它“重置”。

权evnthandler本身上面，它是用来这样一个 “label_Click” 事件处理程序：

  System.Timers.Timer t = new System.Timers.Timer(500); 

      t.Elapsed += t_Elapsed; 

      t.Start(); 

Answer 1

private void Form1_Shown(object sender, EventArgs e) // Shown is an event that occurs when the form is first shown 
{ 
    System.Timers.Timer t = new System.Timers.Timer(50); // This creates a new timer with an interval of 50 ms 

    t.Elapsed += t_Elapsed; // The timer is assigned event for when the interval has elapsed - when 
          // started the, the elapsed event will occur when the given interval 
          // has elapsed (in this case 50ms) 

    t.Start(); // Starts the timer 
} 

Answer 2

，创建一个定时器t这将调用处理器（t_Elapsed）每隔50ms。处理程序将禁用定时器并调用DisplayOrder - 这意味着处理程序将被调用一次。

基本上，它在致电DisplayOrder之前等待50ms。你可能会这样做，而不是：

private async void Form1_Shown(object sender, EventArgs e) 
{ 
    await Task.Delay(50); 
    DisplayOrder(); 
}