WPF路由命令和ShowDialog Windows [英] WPF Routed Commands and ShowDialog Windows

问题描述

我想知道通过ShowDialog打开的窗口是如何在可视树中处理的。

I was wondering how a window opened through ShowDialog is treated in the Visual Tree.

例如，窗口A通过ShowDialog打开窗口B.当在窗口B上触发一个路由命令时，窗口A不会接收命令（即使正在侦听它）。

For example, Window A opens Window B through a ShowDialog. When firing a routed command on Window B, Window A does not receieve the command (even though it is listening for it).

有没有办法使这项工作？

Is there any way to make this work?

谢谢！
Jon

Thanks! Jon

推荐答案

我们在应用程序中遇到这种情况。我们使用Window.Owner属性和ICommandSource.CommandTarget属性。

We run into this situation all the time in our application. We use the Window.Owner property and ICommandSource.CommandTarget property for this.

例如，在窗口A中：

DialogWindow windowB = new DialogWindow();
windowB.Owner = this;
windowB.ShowDialog();

然后，在DialogWindow中，执行命令的所有控件都将其CommandTarget绑定到父窗口的Owner：

Then, in DialogWindow, all the controls that execute commands have their CommandTarget bound to the parent Window's Owner:

<Window x:Class="DialogWindow" x:Name="wnd">
    <Button Command="SomeCommand" CommandTarget="{Binding Owner, ElementName=wnd}"/>
</Window>

或者，如果您从Window B中的代码执行：

Or alternatively, if you're executing from code inside Window B:

SomeCommand.Execute(params, this.Owner);

CommandTarget将允许Window A监听CanExecute和Execute。

CommandTarget will let Window A listen for CanExecute and Execute.

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