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我正在尝试制作 VB.net 程序，并且 UI 就像普通桌面一样。我在图片框中有图像作为桌面快捷方式。因此用户可以在表单中拖动它们。顺便说一句，我不熟练才开始做这样的事情。我可以用鼠标事件移动图片框很好但是拖动时图片框中的图片会撕裂。我有一张大背景图片，我想这是问题所在，但我需要帮助摆脱撕裂。继承人代码thx。我也尝试过作为一个小组并得到相同的结果。编辑：关于拖动的图片是png，50x50，透明BG。

Public Class testform
Dim drag As Boolean
Dim mousex, mousey As Integer
Private Sub testform_Load(sender As Object, e As EventArgs) Handles MyBase.Load
    Me.BackgroundImage = My.Resources.worldmap 'approx 1.03mb Picture size
End Sub
Private Sub dragbox_MouseDown(sender As Object, e As MouseEventArgs) Handles dragbox.MouseDown
    If e.Button = Windows.Forms.MouseButtons.Left Then
        drag = True
        mousex = Windows.Forms.Cursor.Position.X - dragbox.Left
        mousey = Windows.Forms.Cursor.Position.Y - dragbox.Top
    Else
    End If
End Sub

Private Sub dragbox_MouseMove(sender As Object, e As MouseEventArgs) Handles dragbox.MouseMove
    If drag = True Then
        dragbox.Left = Windows.Forms.Cursor.Position.X - mousex
        dragbox.Top = Windows.Forms.Cursor.Position.Y - mousey
    End If
End Sub

Private Sub dragbox_MouseLeave(sender As Object, e As EventArgs) Handles dragbox.MouseLeave
    drag = False
End Sub

结束类

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1 回答 1

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您需要使图片形式双缓冲。这意味着它不会再撕裂，因为它会在显示下一帧之前首先完全确保它就位。

于 2014-04-10T09:07:03.560 回答