何时会引发Close.ExecuteCompleted - Event？ [英] When will the Close.ExecuteCompleted - Event be raised?

问题描述

大家好，

我的事件有些问题，即this.Details.Commands.Close.ExecuteCompleted和相应的保存事件。我在屏幕背后有一些代码。在InitializeDataWorkspace上，我订阅了这两个事件。事实上，他们从来没有筹集过
（我设置了一些断点）。

I've some problems with your Events, namely this.Details.Commands.Close.ExecuteCompleted and the corresponding Save Event. I've some Code in the Screen-Behind. On InitializeDataWorkspace, I subscribe to these two events. As a matter of fact, they never get raised (I've set some breakpoints).

因此，我想知道这个特定事件何时会被提出......

Therefore, I'm wondering when this particular Event will be raised...

推荐答案

仅在调用ExecuteAsync（）时调用ExecuteCompleted。下面是一些可以触发ExecuteCompleted事件进行保存的示例代码，

ExecuteCompleted is only invoked when ExecuteAsync() is called. Here is some sample code that can fire the ExecuteCompleted event for Save,

  partial void Method_Execute()

  {

   this.Details.Commands.Save.ExecuteCompleted += new EventHandler<ExecuteCompletedEventArgs>(Save_ExecuteCompleted);

   

   this.Details.Dispatcher.BeginInvoke( () =>

   {

    this.Details.Commands.Save.ExecuteAsync();

   });

  }



  void Save_ExecuteCompleted(object sender, ExecuteCompletedEventArgs e)

  {

   this.ShowMessageBox("Save_ExecuteCompleted");

  }

For the close command, it is a little different. Once the screen is closed, the screen object is gone and the ExectueCompleted event cannot be found anymore. You can try to define it in other places than the screen itself.

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