InvalidOperationException: 指定的 Visual 不是此 Visual 的子系。 StackTrace: 於 System.Windows.Media.Visual.TrySimpleTransformToAncestor(Visual ancestor, Boolean inverse, GeneralTransform& generalTransform, Matrix& simpleTransform) 於 System.Windows.Media.Visual.TransformToDescendant(Visual descendant) 於 System.Windows.Controls.ScrollViewer.ShouldManipulateScroll(ManipulationStartingEventArgs e, ScrollContentPresenter viewport) 於 System.Windows.Controls.ScrollViewer.OnManipulationStarting(ManipulationStartingEventArgs e) 於 System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target) 於 System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs) 於 System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised) 於 System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args) 於 System.Windows.UIElement.RaiseTrustedEvent(RoutedEventArgs args) 於 System.Windows.Input.InputManager.ProcessStagingArea() 於 System.Windows.Input.InputManager.ProcessInput(InputEventArgs input) 於 System.Windows.Input.ManipulationLogic.RaiseStarting() 於 System.Windows.Input.ManipulationLogic.ReportFrame(ICollection`1 manipulators) 於 System.Windows.Input.ManipulationDevice.ReportFrame() 於 System.Windows.Input.ManipulationDevice.OnRendering(Object sender, EventArgs e) 於 System.Windows.Media.MediaContext.RenderMessageHandlerCore(Object resizedCompositionTarget) 於 System.Windows.Media.MediaContext.RenderMessageHandler(Object resizedCompositionTarget) 於 System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs) 於 System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)