故事板无法找到ControlTemplate元素
我创建了一些相当简单的XAML,并且它完美地运行(至少在KAXML中)。 从XAML中调用时,故事板运行完美,但当我尝试从外部访问它时,我得到错误:
'buttonGlow' name cannot be found in the name scope of 'System.Windows.Controls.Button'.
我正在使用流阅读器加载XAML,如下所示:
Button x = (Button)XamlReader.Load(stream);
并试图运行故事板:
Storyboard pressedButtonStoryboard = Storyboard)_xamlButton.Template.Resources["ButtonPressed"]; pressedButtonStoryboard.Begin(_xamlButton);
我认为问题是我动画的字段在模板中,故事板正在访问按钮。
这是XAML:
任何了解WPF和XAML的人都比我好多了?
这是错误堆栈跟踪:
at System.Windows.Media.Animation.Storyboard.ResolveTargetName(String targetName, INameScope nameScope, DependencyObject element) at System.Windows.Media.Animation.Storyboard.ClockTreeWalkRecursive(Clock currentClock, DependencyObject containingObject, INameScope nameScope, DependencyObject parentObject, String parentObjectName, PropertyPath parentPropertyPath, HandoffBehavior handoffBehavior, HybridDictionary clockMappings, Int64 layer) at System.Windows.Media.Animation.Storyboard.ClockTreeWalkRecursive(Clock currentClock, DependencyObject containingObject, INameScope nameScope, DependencyObject parentObject, String parentObjectName, PropertyPath parentPropertyPath, HandoffBehavior handoffBehavior, HybridDictionary clockMappings, Int64 layer) at System.Windows.Media.Animation.Storyboard.BeginCommon(DependencyObject containingObject, INameScope nameScope, HandoffBehavior handoffBehavior, Boolean isControllable, Int64 layer) at System.Windows.Media.Animation.Storyboard.Begin(FrameworkElement containingObject) at pk_rodoment.SkinningEngine.ButtonControlWPF._button_MouseDown(Object sender, MouseButtonEventArgs e) at System.Windows.Input.MouseButtonEventArgs.InvokeEventHandler(Delegate genericHandler, Object genericTarget) at System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target) at System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs) at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised) at System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args) at System.Windows.UIElement.RaiseEvent(RoutedEventArgs args, Boolean trusted) at System.Windows.Input.InputManager.ProcessStagingArea() at System.Windows.Input.InputManager.ProcessInput(InputEventArgs input) at System.Windows.Input.InputProviderSite.ReportInput(InputReport inputReport) at System.Windows.Interop.HwndMouseInputProvider.ReportInput(IntPtr hwnd, InputMode mode, Int32 timestamp, RawMouseActions actions, Int32 x, Int32 y, Int32 wheel) at System.Windows.Interop.HwndMouseInputProvider.FilterMessage(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled) at System.Windows.Interop.HwndSource.InputFilterMessage(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled) at MS.Win32.HwndWrapper.WndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled) at MS.Win32.HwndSubclass.DispatcherCallbackOperation(Object o) at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Boolean isSingleParameter) at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Boolean isSingleParameter, Delegate catchHandler) at System.Windows.Threading.Dispatcher.WrappedInvoke(Delegate callback, Object args, Boolean isSingleParameter, Delegate catchHandler) at System.Windows.Threading.Dispatcher.InvokeImpl(DispatcherPriority priority, TimeSpan timeout, Delegate method, Object args, Boolean isSingleParameter) at System.Windows.Threading.Dispatcher.Invoke(DispatcherPriority priority, Delegate method, Object arg) at MS.Win32.HwndSubclass.SubclassWndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam) at MS.Win32.UnsafeNativeMethods.DispatchMessage(MSG& msg) at System.Windows.Threading.Dispatcher.PushFrameImpl(DispatcherFrame frame) at System.Windows.Threading.Dispatcher.PushFrame(DispatcherFrame frame) at System.Windows.Threading.Dispatcher.Run() at System.Windows.Application.RunDispatcher(Object ignore) at System.Windows.Application.RunInternal(Window window) at System.Windows.Application.Run(Window window) at System.Windows.Application.Run() at ControlTestbed.App.Main() in C:\svnprojects\rodomont\ControlsTestbed\obj\Debug\App.g.cs:line 0 at System.AppDomain._nExecuteAssembly(Assembly assembly, String[] args) at System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args) at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly() at System.Threading.ThreadHelper.ThreadStart_Context(Object state) at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state) at System.Threading.ThreadHelper.ThreadStart()
终于找到了。 当您在引用ControlTemplate中元素的故事板上调用Begin时,您也必须传入控件模板。
更改:
pressedButtonStoryboard.Begin(_xamlButton);
至:
pressedButtonStoryboard.Begin(_xamlButton, _xamlButton.Template);
修复一切。
我通过重构XAML使其工作,以便SolidColorBrush
和OuterGlowBitmapEffect
是按钮的资源,因此引用由Storyboard
和它们应用的元素共享。 我检索了Storyboard
并在其上调用了Begin()
,但这里是Button
的修改后的XAML:
(请注意键"buttonGlow"
和"borderBackground"
以及引用它们的所有StaticResource
标记扩展。)
Test
我认为只是遇到了这个问题。
让我推荐你关于此事的博客文章: http : //www.cplotts.com/2008/09/26/dr-wpf-namescopes/
基本上,诀窍是你需要使用一个参数调用Begin,该参数是与故事板所针对的同名范围内的对象。
特别是,从上面的示例中,我将尝试调用Begin并发送对模板中_background元素的引用。
如果这不能解决您的问题,请告诉我。
更新:
我更喜欢Erickson的解决方案……而且它也适合我。 我不知道我是如何错过Begin方法的重载!
(@Sam Meldrum)要使STOP工作,请在开头添加’true for“isControllable”
pressedButtonStoryboard.Begin(_xamlButton, _xamlButton.Template);
改成
pressedButtonStoryboard.Begin(_xamlButton, _xamlButton.Template,true);
现在
pressedButtonStoryboard.Stop(xamlButton)
将工作
我也遇到了这个错误。 我的情况有点不同,也许更简单。 我有一个WPF窗口,其中有一个带有动画的模板。 然后,我在窗口本身上为一个按钮定义了一个单独的完全不相关的动画,该动画由MouseEnter触发。 我开始得到’在名称范围内找不到’button1’。 在玩了一些这里的想法并调试实际的Namescope(看看NameScope.GetNameScope(this)的结果后),我终于找到了解决方案:
this.RegisterName("button1", this.button1);
在代码中定义并附加到按钮的MouseEnter方法中。 将在xaml触发器之前调用此MouseEnter。 奇怪的是,如果它在构造函数或Window.Activated()方法中,则register方法不起作用。 希望这有助于某人。