Windows窗体自定义控件：没有UIPermissionWindow.AllWindows的焦点和光标键 [英] Windows Forms custom control: focus and cursor keys without UIPermissionWindow.AllWindows

问题描述

我想为Windows Forms编写一个自定义控件（一个文本编辑器），它应该包含以下功能：

• 获取键盘焦点，当您用鼠标点击它时
  
• 可以看到所有的键盘输入（包括光标键），当它有焦点时


• 可以在 UIPermissionWindow.SafeTopLevelWindows （即它不应该需要 UIPermissionWindow.AllWindows ）运行在半可信环境中。 / li>
  

有没有这样做的例子？

有些方法我可能想要使用像 Control.Focus（）和 Control.InInputKey（），require UIPermissionWindow.AllWindows 。

是否有任何其他方式来获取/实现功能，而不使用这些方法？ b
$ b

内置的TextBox控件具有此功能（获取焦点并处理光标键）。

解决方案公共类UserControl1
继承文本框

私人小组UserControl1_GotFocus（BYVAL发件人作为对象，BYVAL e作为System.EventArgs）处理我。 GotFocus

End Sub

Private Sub UserControl1_KeyDown（ByVal sender As Object，ByVal e As System.Windows.Forms.KeyEventArgs）处理Me.KeyDown
Debug.WriteLine （downed）
Debug.WriteLine（e.KeyValue）
Debug.WriteLine（e.KeyCode）

End Sub

Private Sub UserControl1_KeyPress （ByVal sender As Object，ByVal e As System.Windows.Forms.KeyPressEventArgs）处理Me.KeyPress
Debug.WriteLine（pressed）
Debug.WriteLine（e.KeyChar）
End Sub
End Class

I want to write a custom control (a text editor) for Windows Forms, which should include the following functionality:

• Gets the keyboard focus, when you click on it with the mouse
• Sees all keyboard input (including cursor keys), when it has the focus,
• Can run in a semi-trusted environment, with UIPermissionWindow.SafeTopLevelWindows (i.e. it shouldn't require UIPermissionWindow.AllWindows)

Is there any example of doing this?

Some of the methods which I might want to use, like Control.Focus() and Control.InInputKey(), require UIPermissionWindow.AllWindows.

Is there any other way to get/implement the functionality, without using these methods?

The built-in TextBox control has this functionality (gets the focus and handles cursor keys).

解决方案

Public Class UserControl1
    Inherits TextBox

    Private Sub UserControl1_GotFocus(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.GotFocus

    End Sub

    Private Sub UserControl1_KeyDown(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles Me.KeyDown
        Debug.WriteLine("downed")
        Debug.WriteLine(e.KeyValue)
        Debug.WriteLine(e.KeyCode)

    End Sub

    Private Sub UserControl1_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles Me.KeyPress
        Debug.WriteLine("pressed")
        Debug.WriteLine(e.KeyChar)
    End Sub
End Class

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