Question

private void MoveThumb( Thumb thumb, Point position )
{
    var element = AdornedElement as FrameworkElement;
    position = new Point( position.X * element.ActualWidth, position.Y * element.ActualHeight );
    **var halfSize = (Vector)thumb.DesiredSize / 2;**
    thumb.Arrange( new Rect( position - halfSize, position + halfSize ) );
}

这是我能够转换的VB.net：

    Private Sub MoveThumb(ByVal thumb As Thumb, ByVal position As Point)
        Dim element = TryCast(AdornedElement, FrameworkElement)
        position = New Point(position.X * element.ActualWidth, position.Y * element.ActualHeight)
        Dim halfSize As Object = DirectCast(thumb.DesiredSize, Vector) / 2

        thumb.Arrange(New Rect(position - halfSize, position + halfSize))
    End Sub

它说无法将window.size转换为window.vector

任何人都可以帮助我。

感谢，

Answer 1

删除halfSize声明中的“As Object”。所以它应该是：

dim halfSize = DirectCast(thumb.DesiredSize, Vector) / 2

Answer 2

这是正确的等价物吗？

Dim halfSize As Vector = New Vector(thumb.DesiredSize.Height / 2, thumb.DesiredSize.Width / 2)

需要VB等价物

2 个答案: