本文介绍了故事板找不到 ControlTemplate 元素的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我已经创建了一些相当简单的 XAML，它运行良好(至少在 KAXML 中).从 XAML 内部调用时，情节提要完美运行，但是当我尝试从外部访问它们时，出现错误:
I've created some fairly simple XAML, and it works perfectly (at least in KAXML). The storyboards run perfectly when called from within the XAML, but when I try to access them from outside I get the error:
'buttonGlow' name cannot be found in the name scope of 'System.Windows.Controls.Button'.
我正在使用流读取器加载 XAML，如下所示:
I am loading the XAML with a stream reader, like this:
Button x = (Button)XamlReader.Load(stream);
并尝试使用以下命令运行 Storyboard:
And trying to run the Storyboard with:
Storyboard pressedButtonStoryboard =
Storyboard)_xamlButton.Template.Resources["ButtonPressed"];
pressedButtonStoryboard.Begin(_xamlButton);
我认为问题在于我正在制作动画的字段在模板中，而情节提要正在访问按钮.
I think that the problem is that fields I am animating are in the template and that storyboard is accessing the button.
这是 XAML:
<Button xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:customControls="clr-namespace:pk_rodoment.SkinningEngine;assembly=pk_rodoment"
Width="150" Height="55">
<Button.Resources>
<Style TargetType="Button">
<Setter Property="Control.Template">
<Setter.Value>
<ControlTemplate TargetType="Button">
<Grid Background="#00FFFFFF">
<Grid.BitmapEffect>
<BitmapEffectGroup>
<OuterGlowBitmapEffect x:Name="buttonGlow" GlowColor="#A0FEDF00" GlowSize="0"/>
</BitmapEffectGroup>
</Grid.BitmapEffect>
<Border x:Name="background" Margin="1,1,1,1" CornerRadius="15">
<Border.Background>
<SolidColorBrush Color="#FF0062B6"/>
</Border.Background>
</Border>
<ContentPresenter HorizontalAlignment="Center"
Margin="{TemplateBinding Control.Padding}"
VerticalAlignment="Center"
Content="{TemplateBinding ContentControl.Content}"
ContentTemplate="{TemplateBinding ContentControl.ContentTemplate}"/>
</Grid>
<ControlTemplate.Resources>
<Storyboard x:Key="ButtonPressed">
<Storyboard.Children>
<DoubleAnimation Duration="0:0:0.4"
FillBehavior="HoldEnd"
Storyboard.TargetName="buttonGlow"
Storyboard.TargetProperty="GlowSize" To="4"/>
<ColorAnimation Duration="0:0:0.6"
FillBehavior="HoldEnd"
Storyboard.TargetName="background"
Storyboard.TargetProperty="(Panel.Background).(SolidColorBrush.Color)"
To="#FF844800"/>
</Storyboard.Children>
</Storyboard>
<Storyboard x:Key="ButtonReleased">
<Storyboard.Children>
<DoubleAnimation Duration="0:0:0.2"
FillBehavior="HoldEnd"
Storyboard.TargetName="buttonGlow"
Storyboard.TargetProperty="GlowSize" To="0"/>
<ColorAnimation Duration="0:0:0.2"
FillBehavior="Stop"
Storyboard.TargetName="background"
Storyboard.TargetProperty="(Panel.Background).(SolidColorBrush.Color)"
To="#FF0062B6"/>
</Storyboard.Children>
</Storyboard>
</ControlTemplate.Resources>
<ControlTemplate.Triggers>
<Trigger Property="ButtonBase.IsPressed" Value="True">
<Trigger.EnterActions>
<BeginStoryboard Storyboard="{StaticResource ButtonPressed}"/>
</Trigger.EnterActions>
<Trigger.ExitActions>
<BeginStoryboard Storyboard="{StaticResource ButtonReleased}"/>
</Trigger.ExitActions>
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</Button.Resources>
<DockPanel>
<TextBlock x:Name="TextContent" FontSize="28" Foreground="White" >Test</TextBlock>
</DockPanel>
</Button>
任何比我更了解 WPF 和 XAML 的人有什么建议吗?
Any suggestions from anyone who understands WPF and XAML a lot better than me?
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()
推荐答案
终于找到了.当您对引用 ControlTemplate 中元素的情节提要调用 Begin 时，您还必须传入控件模板.
Finally found it. When you call Begin on storyboards that reference elements in the ControlTemplate, you must pass in the control template as well.
变化:
pressedButtonStoryboard.Begin(_xamlButton);
致:
pressedButtonStoryboard.Begin(_xamlButton, _xamlButton.Template);
修复一切.
这篇关于故事板找不到 ControlTemplate 元素的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！