I'm attempting to use a resource dictionary and the style TargetType property to change the look of the buttons in my solution. I am receiving a cast error at run time when the first button is loaded. Everything is working fine if I manually set the style in the button's properties, but the point is to change the look of all the buttons, not one at a time.
Here's the relevant exception:
System.Windows.Markup.XamlParseException occurred
HResult=-2146233087
Message='Initialization of 'System.Windows.Controls.Button' threw an exception.' Line number '6' and line position '72'.
Source=PresentationFramework
LineNumber=6
LinePosition=72
StackTrace:
at System.Windows.Markup.WpfXamlLoader.Load(XamlReader xamlReader, IXamlObjectWriterFactory writerFactory, Boolean skipJournaledProperties, Object rootObject, XamlObjectWriterSettings settings, Uri baseUri)
at System.Windows.Markup.WpfXamlLoader.LoadBaml(XamlReader xamlReader, Boolean skipJournaledProperties, Object rootObject, XamlAccessLevel accessLevel, Uri baseUri)
at System.Windows.Markup.XamlReader.LoadBaml(Stream stream, ParserContext parserContext, Object parent, Boolean closeStream)
at System.Windows.Application.LoadComponent(Object component, Uri resourceLocator)
at WpfTestApplication.Views.MainWindow.InitializeComponent() in d:\TFSC\CUDL\Research\Chris.Dailey\WpfTestApplication\WpfTestApplication\Views\MainWindow.xaml:line 1
at WpfTestApplication.Views.MainWindow..ctor() in d:\TFSC\CUDL\Research\Chris.Dailey\WpfTestApplication\WpfTestApplication\Views\MainWindow.xaml.cs:line 28
InnerException: System.InvalidCastException
HResult=-2147467262
Message=Unable to cast object of type 'MS.Internal.NamedObject' to type 'System.Windows.FrameworkTemplate'.
Source=PresentationFramework
StackTrace:
at System.Windows.Controls.Control.OnTemplateChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
at System.Windows.DependencyObject.OnPropertyChanged(DependencyPropertyChangedEventArgs e)
at System.Windows.FrameworkElement.OnPropertyChanged(DependencyPropertyChangedEventArgs e)
at System.Windows.DependencyObject.NotifyPropertyChange(DependencyPropertyChangedEventArgs args)
at System.Windows.DependencyObject.UpdateEffectiveValue(EntryIndex entryIndex, DependencyProperty dp, PropertyMetadata metadata, EffectiveValueEntry oldEntry, EffectiveValueEntry& newEntry, Boolean coerceWithDeferredReference, Boolean coerceWithCurrentValue, OperationType operationType)
at System.Windows.StyleHelper.ApplyStyleOrTemplateValue(FrameworkObject fo, DependencyProperty dp)
at System.Windows.StyleHelper.InvalidateContainerDependents(DependencyObject container, FrugalStructList`1& exclusionContainerDependents, FrugalStructList`1& oldContainerDependents, FrugalStructList`1& newContainerDependents)
at System.Windows.StyleHelper.DoStyleInvalidations(FrameworkElement fe, FrameworkContentElement fce, Style oldStyle, Style newStyle)
at System.Windows.StyleHelper.UpdateStyleCache(FrameworkElement fe, FrameworkContentElement fce, Style oldStyle, Style newStyle, Style& styleCache)
at System.Windows.FrameworkElement.OnStyleChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
at System.Windows.DependencyObject.OnPropertyChanged(DependencyPropertyChangedEventArgs e)
at System.Windows.FrameworkElement.OnPropertyChanged(DependencyPropertyChangedEventArgs e)
at System.Windows.DependencyObject.NotifyPropertyChange(DependencyPropertyChangedEventArgs args)
at System.Windows.DependencyObject.UpdateEffectiveValue(EntryIndex entryIndex, DependencyProperty dp, PropertyMetadata metadata, EffectiveValueEntry oldEntry, EffectiveValueEntry& newEntry, Boolean coerceWithDeferredReference, Boolean coerceWithCurrentValue, OperationType operationType)
at System.Windows.DependencyObject.InvalidateProperty(DependencyProperty dp, Boolean preserveCurrentValue)
at System.Windows.FrameworkElement.UpdateStyleProperty()
at System.Windows.FrameworkElement.OnInitialized(EventArgs e)
at System.Windows.FrameworkElement.TryFireInitialized()
at System.Windows.FrameworkElement.EndInit()
at MS.Internal.Xaml.Runtime.ClrObjectRuntime.InitializationGuard(XamlType xamlType, Object obj, Boolean begin)
InnerException:
Here's the relevant code. The Resource Dictionary:
<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"> <Style TargetType="{x:Type Button}">
<Style TargetType="{x:Type Button}">
<Setter Property="Control.Template" Value="{StaticResource ButtonTemplate}"
</Style>
<ControlTemplate x:Key="ButtonTemplate" TargetType="{x:Type Button}">
<Border Name="Border" BorderBrush="Orange" BorderThickness="3" CornerRadius="3" Background="Red" TextBlock.Foreground="White">
<Grid>
<Rectangle Name="FocusCue" Visibility="Hidden" Stroke="Black" StrokeThickness="1" StrokeDashArray="1 2" SnapsToDevicePixels="True" ></Rectangle>
<ContentPresenter RecognizesAccessKey="True" Margin="{TemplateBinding Padding}"></ContentPresenter>
</Grid>
</Border>
<ControlTemplate.Triggers>
<Trigger Property="IsMouseOver" Value="True">
<Setter TargetName="Border" Property="Background" Value="DarkRed" />
</Trigger>
<Trigger Property="IsPressed" Value="True">
<Setter TargetName="Border" Property="Background" Value="IndianRed" />
<Setter TargetName="Border" Property="BorderBrush" Value="DarkKhaki" />
</Trigger>
<Trigger Property="IsKeyboardFocused" Value="True">
<Setter TargetName="FocusCue" Property="Visibility" Value="Visible" />
</Trigger>
<Trigger Property="IsEnabled" Value="False">
<Setter TargetName="Border" Property="TextBlock.Foreground" Value="Gray" />
<Setter TargetName="Border" Property="Background" Value="MistyRose" />
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</ResourceDictionary>
The main window:
<Window x:Class="WpfTestApplication.Views.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="MainWindow" Height="350" Width="525">
<WrapPanel>
<Button x:Name="ButtonGradient" Click="ButtonGradient_OnClick">Gradient</Button>
<Button x:Name="ButtonDrawing" Click="ButtonDrawing_OnClick">Drawing</Button>
<Button x:Name="ButtonEventTester" Click="ButtonEventTester_OnClick">Event Tester</Button>
<Button x:Name="ButtonCommandTester" Style="{x:Null}" Command="New">Execute a Command</Button>
</WrapPanel>
I would appreciate any input on what might be causing this. The outer error is completely useless, and I don't know enough about this to understand why a casting error might be occuring.