WPF (經驗談) 標籤內嵌事件與 AddHandler 之問題

若出現事件出現問題，若該事件是內嵌在XAML內，不妨取消。改以AddHandler 載入試試看。

例如以下Slider標籤，ValueChanged事件，將無法執行



若改以在WindowLoaded事件載入，就可以正常運作

AddHandler slider.ValueChanged, AddressOf slider_ValueChanged

Private Sub slider_ValueChanged(ByVal sender As System.Object, ByVal e As System.Windows.RoutedPropertyChangedEventArgs(Of System.Double))
Dim i As Integer
scaleTransform1.ScaleX = e.NewValue
scaleTransform1.ScaleY = e.NewValue

Dim centerOfViewport = New Point(scrollViewer.ViewportWidth / 2, scrollViewer.ViewportHeight / 2)
lastCenterPositionOnTarget = scrollViewer.TranslatePoint(centerOfViewport, grid)