Is there any way to disable the "double-click to copy" functionality of a .NET label?

Question

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!

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.

Is there any way to disable this functionality?

Answer 1

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

Answer 2

When internal text value is empty then double clicking on label not trying to copy text value to clipboard. This method more cleaner than other alternatives I think:

using System;
using System.Windows.Forms;

public class LabelNoCopy : Label
{
    private string text;

    public override string Text
    {
        get
        {
            return text;
        }
        set
        {
            if (value == null)
            {
                value = "";
            }

            if (text != value)
            {
                text = value;
                Refresh();
                OnTextChanged(EventArgs.Empty);
            }
        }
    }
}