如何通过事件处理程序传递发件人 [英] How to pass sender through event handler

问题描述

我正在使用 http://wpfmdi.codeplex.com/ 库来处理我的MDI WPF应用程序。

I'm using the http://wpfmdi.codeplex.com/ library to handle MDI in my WPF application.

我有一个Canvas包含一个子容器，它又包含一些小窗口。我想在其中一个小窗口关闭时执行一个动作，所以我试图执行以下操作：

I've got a Canvas which contains a child container, which in turn contains a number of small windows. I would like to perform an action when one of the small windows is closed, so I tried to do the following:

MdiChild child = new MdiChild();
child.Closing += new RoutedEventHandler(DatabaseTableWindow_Closing); 

private void DatabaseTableWindow_Closing(object sender, RoutedEventArgs e)
        {
            object s = e.Source;
        }

当窗口关闭时，方法已成功输入， e.Source 为null。我也检查了发件人，也是空的。所有我想要的是一种查找哪个窗口触发事件的方法。

While the method is successfully entered when a window is closed, e.Source is null. I've also checked the sender and that is null too. All I want is a way to find out which window fired the event.

推荐答案

如果 / code>是 null ，那么这听起来像您正在使用的MDI框架中的一个监督/错误。由于您有源代码，您可以修复它：找到关闭事件引发的地方，并添加此作为发件人。当您处理该事件时，应该可以引用 MdiChild 。

If the sender is null, then it sounds like an oversight/bug in the MDI framework you are using. Since you have the source, you can fix it: locate the place(s) where the Closing event is raised, and add this as the sender. That should give you a reference to the MdiChild when you are handling the event.

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