延迟功能一小段时间 [英] delaying a function for a small time

问题描述

我在按钮点击事件中同时调用两个函数。

 label1.text =   hai; 
 JukeBox_Timer.Stop（）; 
 JukeBox_Timer.Start（）; 
 
 thread.sleep（ 3000 ）; 
 clearfstext（pagenation_value）; 
 
 settheme（  \\\\ Page Selection.swf）; 
 

这里我要显示标签然后等待三秒然后

settheme（\\\\ Selection Selection.swf）;

活动来了



但这里问题是它没有显示label.text线程休眠并直接转到函数settheme（\\\\ Selection Selection.swf）;

解决方案

< blockquote> lable1.Text =hai; 不会立即执行。与所有GUI操作一样，它会在下一个UI重绘之前进行排队。但是UI线程被 thread.Sleep（3000）; 阻止。



所以你需要执行睡在工人线程中的一部分。类似

  private   void  DelayedMethod（）
 {
 System.Threading.Thread.Sleep（ 3000 ）; 
 
 SetTheme（  Whatever）; 
} 
 
  void  YourCurrentMethodOnUiThread（）
 {
 label1.Text =   hai; 
 
 System.Threading.Thread otherThread =  new  System.Threading.Thread（DelayedMethod）; 
 otherThread.Start（）; 
} 

一个简单的解决方案是使用Refresh方法强制立即重绘标签。

 label1.text =   hai; 
 label1.Refresh（）; 
 JukeBox_Timer.Stop（）; 
 JukeBox_Timer.Start（）; 
 
 thread.sleep（ 3000 ）; 
 clearfstext（pagenation_value）; 
 
 settheme（  \\\\ Page Selection.swf）; 
 

i'm calling two functions simultaneously in a button click event.

   label1.text="hai";
  JukeBox_Timer.Stop();
  JukeBox_Timer.Start();

thread.sleep(3000);
  clearfstext(pagenation_value);

  settheme("\\Page Selection.swf");

here i want to show the label then it waits for three second then the
settheme("\\Page Selection.swf");
event come

but here is the problem that it does not show the label.text the thread sleeps and directly go to the function settheme("\\Page Selection.swf");

解决方案

lable1.Text = "hai"; doesn't get executed immediately. Like all GUI operations, it gets queued inernally until the next UI redraw. But the UI thread is blocked by thread.Sleep(3000);.

So you need to execute the sleep part in a worker thread. Something like

private void DelayedMethod()
{
    System.Threading.Thread.Sleep(3000);

    SetTheme("Whatever");
}

void YourCurrentMethodOnUiThread()
{
    label1.Text = "hai";

    System.Threading.Thread otherThread = new System.Threading.Thread(DelayedMethod);
    otherThread.Start();
}

A simple solution is to force immediate redraw of the label using the Refresh method.

label1.text="hai";
label1.Refresh();
JukeBox_Timer.Stop();
JukeBox_Timer.Start();

thread.sleep(3000);
clearfstext(pagenation_value);

settheme("\\Page Selection.swf");

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