如果拖动或按住鼠标按钮，发件人不会在 MouseMove 上更新
我正在尝试实现自定义拖动操作来对面板进行排序。
我将一个对象分配给 MouseDown 事件中的变量，并通过在将鼠标拖动到相邻面板上时检查相邻面板的 MouseMove 事件来跟踪其相对位置。
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 参数永远不会改变 – 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
为什么 MouseMove 的 Sender 参数不返回鼠标当前悬停的实际对象？
I am trying to implemented a custom dragging operation to sort panels.
I assign an object to a variable in the MouseDown event and track it’s relative position by examining the MouseMove event of the neighbouring panels as I drag the mouse over them.
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
The problem is that the Sender parameter of the MouseMove event never changes – it always returns the object that received the MouseDown event.
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
Why is the Sender argument of MouseMove not returning the actual object that the mouse is currently over?
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要覆盖此行为，请将
Control.Capure属性设置为False。现在，MouseMove 事件返回鼠标移动到的实际对象！
To override this behaviour, set the
Control.Capureproperty toFalse.And now the MouseMove event returns the actual object that the mouse moves over!