刷新/更新 WPF 控件，如 win 表单 [英] Refresh / Update WPF controls like win forms

问题描述

更改标签的文本(或者更复杂的我们可以说是基于文本的进度条).在 winforms 中，您只是无效/更新.

changing the text of a label (or sophisticatedly we can say a text-based progress bar). in winforms you just Invalidate / Update.

但是如何在不使用后台线程的情况下在 WPF 中执行此操作.???

But how to do this in WPF without using Background Threads. ???

推荐答案

    public static class ExtensionMethods
{

   private static Action EmptyDelegate = delegate() { };


   public static void Refresh(this UIElement uiElement)
   {
      uiElement.Dispatcher.Invoke(DispatcherPriority.Render, EmptyDelegate);
   }
}

private void LoopingMethod()
{
   for (int i = 0; i < 10; i++)
   {
      label1.Content = i.ToString();
      label1.Refresh();
      Thread.Sleep(500);
   }
}

参考:http://geekswithblogs.net/NewThingsILearned/archive/2008/08/25/refresh--update-wpf-controls.aspx

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