有没有什么办法禁用＆QUOT;双击复制＆QUOT;一个.NET标签的功能？

问题描述

这实在是烦人。我使用的标注为列表项的用户控件，用户可以单击它，选择列表项并双击它，将其重命名的一部分。但是，如果您在剪贴板中有一个名字，双击标签将它与标签的文本替换！

This is really annoying. I'm using the label as part of a list item user control, where the user can click it to select the list item and double-click it to rename it. However, if you had a name in the clipboard, double-clicking the label will replace it with the text of the label!

我还检查应用程序的其它标签，他们也将复制到剪贴板上双击。我没有写任何剪贴板code这个计划，我现在用的是标准的.NET标签。

I've also check the other labels in the application, and they will also copy to the clipboard on a doubleclick. I have not written any clipboard code in this program, and I am using the standard .NET labels.

有没有方法来禁用此功能？

Is there any way to disable this functionality?

推荐答案

我能够使用给出其他答案的组合来做到这一点。尝试创建这个派生类和替换你想用它禁用剪贴板功能的任何标签：

I was able to do it using a combination of the other answers given. Try creating this derived class and replace any labels you wish to disable the clipboard functionality with it:

Public Class LabelWithOptionalCopyTextOnDoubleClick
    Inherits Label

    Private Const WM_LBUTTONDCLICK As Integer = &H203

    Private clipboardText As String

    <DefaultValue(False)> _
    <Description("Overrides default behavior of Label to copy label text to clipboard on double click")> _
    Public Property CopyTextOnDoubleClick As Boolean

    Protected Overrides Sub OnDoubleClick(e As System.EventArgs)
        If Not String.IsNullOrEmpty(clipboardText) Then Clipboard.SetData(DataFormats.Text, clipboardText)
        clipboardText = Nothing
        MyBase.OnDoubleClick(e)
    End Sub

    Protected Overrides Sub WndProc(ByRef m As System.Windows.Forms.Message)
        If Not CopyTextOnDoubleClick Then
            If m.Msg = WM_LBUTTONDCLICK Then
                Dim d As IDataObject = Clipboard.GetDataObject()
                If d.GetDataPresent(DataFormats.Text) Then
                    clipboardText = d.GetData(DataFormats.Text)
                End If
            End If
        End If

        MyBase.WndProc(m)
    End Sub

End Class

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