Question

Private Sub TextBox1_KeyDown(sender As Object, e As KeyEventArgs) Handles TextBox1.KeyDown
    If e.KeyCode = Keys.V Then
        If e.Control = True Then
            e.Handled = True 'eat it
        End If
    End If
End Sub

这不起作用。有谁知道为什么以及如何以适当的方式实现同样的目标？

谢谢！

ps：为什么.Handled属性是可写的，但它没有做任何事情？我想我错过了什么。

Answer 1

您应该捕获KeyPress事件而不是KeyDown：

Private isCopyPaste As Boolean = False
Private Sub TextBox1_KeyDown(sender As Object, e As KeyEventArgs) Handles TextBox1.KeyDown
     isCopyPaste = (e.KeyCode = Keys.V AndAlso e.Control)
End Sub

Private Sub TextBox1_KeyPress(sender As Object, e As KeyPressEventArgs ) Handles TextBox1.KeyPress
    If isCopyPaste Then
        e.Handled = True 'eat it
    End If
End Sub

另请在MSDN上查看此参考：http://msdn.microsoft.com/en-us/library/system.windows.forms.control.keypress.aspx

Answer 2

改为使用SuppressKeyPress：

Private Sub TextBox1_KeyDown(sender As Object, e As KeyEventArgs) Handles TextBox1.KeyDown
  If e.KeyCode = Keys.V Then
    If e.Control = True Then
      e.SuppressKeyPress = True
    End If
  End If
End Sub

在KeyDown吃钥匙

2 个答案: