如何在 Prism 4 中启用 DelegateCommand 的 KeyBinding？
我想在 Prism4 桌面应用程序中为 DelegateCommand 启用 KeyBinding。例如，在我的 XAML 文件中，我有这样的：
<Grid.InputBindings>
<KeyBinding Gesture="CTRL+A" Command="{Binding Command3}"/>
</Grid.InputBindings>
<StackPanel>
<Button Grid.Row="0" Grid.Column="1" Content="HitMe" prism:Click.Command="{Binding Command3}" />
</StackPanel>
在我的 ViewModel 中，我有这样的：
public DelegateCommand<string> Command3 { get; private set; }
private void ExecuteCommand3(string commandParameter)
{
Debug.WriteLine("ExecuteCommand3");
}
private bool CanExecuteCommand3(string commandParameter)
{
return true;
}
当我按 HitMe 按钮时，调试行输出，但按 CTRL+A 没有效果。
我考虑过使用 TestMvvmExample2341 中的 CommandReference 类，但这似乎重复了 Prism 4 机制的功能。
有没有一种简单的方法可以让 CTRL+A 调用 Prism4 中的 Command3？
I would like to enable a KeyBinding for a DelegateCommand in a Prism4 desktop application. For example, in my XAML file I have this:
<Grid.InputBindings>
<KeyBinding Gesture="CTRL+A" Command="{Binding Command3}"/>
</Grid.InputBindings>
<StackPanel>
<Button Grid.Row="0" Grid.Column="1" Content="HitMe" prism:Click.Command="{Binding Command3}" />
</StackPanel>
and in my ViewModel I have this:
public DelegateCommand<string> Command3 { get; private set; }
private void ExecuteCommand3(string commandParameter)
{
Debug.WriteLine("ExecuteCommand3");
}
private bool CanExecuteCommand3(string commandParameter)
{
return true;
}
When I press the HitMe button the debug line outputs but pressing CTRL+A has no effect.
I have considered using the CommandReference class from TestMvvmExample2341 but that seems to duplicate the functionality of Prism 4 mechanisms.
Is there a an easy way to have CTRL+A invoke the Command3 in Prism4?
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就是这样，也许您的问题与视图中的焦点有关，请尝试以下操作：
在运行时将焦点设置在按钮上，然后应用击键。另请查看这些帖子：
WPF MVVM KeyBinding 无法立即识别且并不总是有效
http://joyfulwpf.blogspot.com/2009/05/mvvm-commandreference-and-keybinding.html
That's it, maybe your problem is related to the Focus in your view, try this:
At runtime set the focus over the Button and then apply the keystroke. Also take a look at these posts:
WPF MVVM KeyBinding not being recognized right away and not always working
http://joyfulwpf.blogspot.com/2009/05/mvvm-commandreference-and-keybinding.html