创建一个简单的，未经修改的重点在WPF绑定 [英] Create a simple, unmodified key binding in WPF

问题描述

我想创建一个非常简单的WPF应用程序。我想有一个叫做命令处理程序，当用户pressesH（不控制-H或者Alt-H，只是H）。如果我使用code-背后code以下内容：

I'm trying to create a very simple WPF application. I'd like to have an command handler called when the user presses "H" (not Control-H or Alt-H, just H). If I use the following in code-behind code:

var gesture = new KeyGesture(Key.H, ModifierKeys.None);
var inputBinding = new InputBinding(MyRoutedCommand, gesture);
InputBindings.Add(inputBinding);

我立即得到一个异常说，关键和修饰符的组合不支持KeyGesture。

I immediately get an exception saying that the key and modifier combination isn't supported for KeyGesture.

（我得到同样的异常，如果我创建XAML做类似的事情）。

(I get the same exception if I create the XAML to do the analogous thing).

我的应用程序不接受输入，没有文本框是在应用程序中，所以没有真正的文字（至少在我的脑海里）发生冲突。我也不会想到，这将是如此不同寻常。

My application doesn't accept typed input, no text boxes are in the application, so there isn't really a conflict with text (at least in my mind). I wouldn't have thought that this would be so unusual.

我见过其他地方的意见是认为我可以在低级别的这个或截获键盘presses创建一个自定义的控制，但这些似乎是一个很大的开销。任何简单的想法？

I've seen comments elsewhere that suggest that I could create a custom control for this or intercept keyboard presses at a low level, but these seem like a lot of overhead. Any simpler thoughts?

推荐答案

不要使用 KeyGesture 类型或属性（如一个关键的不是姿态）。

Don't use the KeyGesture type or property (as one key is not a gesture).

例如。

KeyBinding b = new KeyBinding()
    {
        Command = MyRoutedCommand,
        Key = Key.H
    };
InputBindings.Add(b);

相同的XAML

Same for XAML

<KeyBinding Command="{Binding MyRoutedCommand}" Key="H" />

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