WPF 中一个简单刷新 UI 的方法

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private static DispatcherOperationCallback exitFrameCallback = new DispatcherOperationCallback(ExitFrame);
public static void DoEvents()
{
  DispatcherFrame nestedFrame = new DispatcherFrame();
  DispatcherOperation exitOperation = Dispatcher.CurrentDispatcher.BeginInvoke(DispatcherPriority.Background,exitFrameCallback, nestedFrame);
  Dispatcher.PushFrame(nestedFrame);
  if (exitOperation.Status !=DispatcherOperationStatus.Completed)
  {
    exitOperation.Abort();
  }
}
private static Object ExitFrame(Object state)
{
    DispatcherFrame frame = state as
    DispatcherFrame;
    frame.Continue = false;
    return null;
}