如何使用vb wpf检测删除按钮 [英] How to detect delete button using vb wpf

问题描述

我曾在窗口窗体中使用过此代码...但似乎无法使用WPF：

i once used this code within window forms...but seems not to work with WPF:

Private Sub frm_KeyDown(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles Me.KeyDown
        If e.KeyCode = Keys.Delete Then MsgBox("You have pressed delete")
    End Sub

我应该怎么做才知道.thnkx

Any idea of how i should do it.thnkx

推荐答案

请确保 this.KeyPreview = true; 设置正确。



另请注意，在WPF中，事件是冒泡或通过隧道传输的。因此，事件有时不会处理您希望处理的事件。

通过冒泡或隧道基本的WPF事件 [ ^ ]以获得更好的解释。



此外， PreviewKeyDown 是一个隧道事件，在视觉树的顶部即窗口级别更容易处理。

Please ensure that this.KeyPreview = true; is set correctly.

Also note that in WPF events are bubbled or tunneled. As a result, events are sometimes not handled where you expect them to be handled.
Go through To bubble or tunnel basic WPF events[^] for a better explanation.

Further, PreviewKeyDown is a tunneling event and is easier handled at the top of the visual tree i.e. window level.

KeyEventArgs中有e.Key属性WPF

There is e.Key property for KeyEventArgs in WPF

Console.WriteLine(e.Key.ToString());

希望这有帮助！

Hope this helps!

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