创建另一个线程来获取当前窗口（System.Windows.Application.Current.MainWindow）

Question

我需要当前窗口来显示一个自定义的MessageBox。我这样做：

Window owner = System.Windows.Application.Current.MainWindow; 

有时它的工作原理。当它不工作，我得到这个错误：

System.InvalidOperationException: {"The calling thread cannot access this object because a different thread owns it."} 
InnerException: null 
Message: The calling thread cannot access this object because a different thread owns it. 

会解决是踢这个调用关闭以比主线程一个单独的线程？如果是这样，我该怎么做？谢谢。

Answer 1

你需要使用的调度和调用/的BeginInvoke封送回调到UI线程：

System.Windows.Application.Current.Dispatcher.Invoke((Action)() => 
{ 
     Window owner = System.Windows.Application.Current.MainWindow; 

     // Use owner here - it must be used on the UI thread as well.. 
     ShowMyWindow(owner); 
});