单击面板时移动表单vb.net

Question

我有一个没有边框样式的 form1，我想让这个表单在用户移动 panel1 时移动。 在进行简单的搜索后，我发现这个解决方案 C# 的情况相同

private void panel1_MouseMove(object sender, MouseEventArgs e)
{
if (e.Button == MouseButtons.Left)
{
    this.Location = new Point(Cursor.Position.X + e.X , Cursor.Position.Y + e.Y);
}
}

对于我的情况，我使用 vb.net，所以我尝试制作类似的代码但我失败了：

Private Sub Panel1_MouseMove(sender As Object, e As MouseEventArgs) Handles GunaPanel1.MouseMove
    If e.Button = MouseButtons.Left Then
        MainDashboard.Location = New Point(Cursor.Position.X + e.X, Cursor.Position.Y + e.Y)
    End If
End Sub

Answer 1

这里是解决方案： MouseIsDown 和 MouseIsDownLoc 是模块级变量。

    Private MouseIsDown As Boolean = False
    Private MouseIsDownLoc As Point = Nothing
    Private Sub Panel1_MouseMove(sender As Object, e As MouseEventArgs) Handles Panel1.MouseMove

        If e.Button = MouseButtons.Left Then
            If MouseIsDown = False Then
                MouseIsDown = True
                MouseIsDownLoc = New Point(e.X, e.Y)
            End If

            Me.Location = New Point(Me.Location.X + e.X - MouseIsDownLoc.X, Me.Location.Y + e.Y - MouseIsDownLoc.Y)
        End If
    End Sub
    Private Sub Panel1_MouseUp(sender As Object, e As MouseEventArgs) Handles Panel1.MouseUp
        MouseIsDown = False
    End Sub