在wpf应用程序中显示busyindicator [英] Display busyindicator in wpf application

问题描述

我有一个来自wpf扩展工具包的BusyIndi​​cator，并且我正在运行一个需要一段时间才能完成的函数.如果我在单独的线程中运行耗时的任务，则会收到NotSupportedException，因为我正尝试从该不同的线程将对象插入到ObservableCollection中.我真的不想花很多时间重构代码，如果可能的话...有没有办法我可以在一个单独的线程中设置指标的可见性呢?

I have a BusyIndicator from the wpf extended toolkit and I'm running a function that takes a while to complete. If I run the time consuming task in a separate thread, I get a NotSupportedException because I'm attemping to insert objects into an ObservableCollection from that different thread. I don't really want to spend a lot of time refactoring the code, if possible... Is there a way that I can set the visibility of the indicator in a separate thread instead?

编辑

ThreadStart start = delegate()
  {
      System.Windows.Application.Current.Dispatcher.Invoke((Action)(() =>
          {
              IsBusy = true;
          }));
   };

new Thread(start).Start();                                
longRunningFunction();

这对我也不起作用.

推荐答案

您应该能够使用

You should be able to use the Dispatcher for things like that. e.g.

Application.Current.Dispatcher.Invoke((Action)(() =>
{
    _indicator.Visibility = Visibility.Visible;
}));

这将导致代码在UI线程上运行.

This will cause the code to be run on the UI-Thread.

使用线程模型参考.

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