C# 如果拖动或按住鼠标按钮，则发送者不在MouseMove上更新

我正在尝试实现一个自定义拖动操作来对面板进行排序

我在MouseDown事件中将一个对象指定给一个变量，并在将鼠标拖动到相邻面板上时通过检查MouseMove事件来跟踪它的相对位置

Private Sub ThumbnailMouseDown(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs)

    _thumbnailMove = DirectCast(sender, Windows.Forms.Control)  ‘The object to move

End Sub

问题是MouseMove事件的Sender参数永远不会更改–它总是返回接收MouseDown事件的对象

Private Sub ThumbnailMouseDown(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs)

    Console.WriteLine(sender.Name)  'Always returns the name of the _thumbnailToMove

End Sub

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为什么MouseMove的Sender参数没有返回鼠标当前所在的实际对象？

要覆盖此行为，请将Control.Capure属性设置为False

现在MouseMove事件返回鼠标移动的实际对象

Private Sub ThumbnailMouseDown(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs)

    DirectCast(sender, Windows.Forms.Control).Capture = False   'Don't capture the mouse
    _thumbnailMove = DirectCast(sender, Windows.Forms.Control)

End Sub