设计器显示:无效的Xaml
本文关键字：无效 Xaml 显示 | 更新日期: 2023-09-27 18:23:42
你好，我有一些例子，部署的代码工作时没有任何错误，但设计者抱怨。
我搜索这种类型的错误是指项目名称中有"空格"或phone.controls的旧版本。这对我来说都不是问题。因此，我认为这可能是模板结构的变化？我有三个例子都给出了错误：
示例1
<ListBox Canvas.ZIndex="1001" Grid.Row="0" x:Name="ColorPickerListBox" ItemsSource="{Binding ColorList}">
<ListBox.ItemTemplate>
<DataTemplate>
<Button BorderBrush="Transparent" BorderThickness="0" Command="{Binding DataContext.ChangeColourCommand, ElementName=ColorPickerListBox}" CommandParameter="{Binding}">
<Button.Template>
<ControlTemplate>
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="50"/>
<ColumnDefinition Width="50"/>
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="50"/>
<RowDefinition Height="10"/>
</Grid.RowDefinitions>
<Rectangle Grid.Column="0" Fill="{Binding color}">
</Rectangle>
<TextBlock Text="{Binding name}" TextWrapping="Wrap" TextAlignment="Center" VerticalAlignment="Center" Grid.Column="1" FontSize="10"/>
</Grid>
</ControlTemplate>
</Button.Template>
</Button>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
示例2
<View:CanvasItemsControl ItemsSource="{Binding DecorationOnShield}">
<View:CanvasItemsControl.ItemsPanel>
<ItemsPanelTemplate>
<Canvas/>
</ItemsPanelTemplate>
</View:CanvasItemsControl.ItemsPanel>
</View:CanvasItemsControl>
示例3
<ControlTemplate TargetType="Button">
<Grid Background="Transparent">
<VisualStateManager.VisualStateGroups>
<VisualStateGroup x:Name="CommonStates">
<VisualState x:Name="Normal"/>
<VisualState x:Name="MouseOver"/>
<VisualState x:Name="Pressed">
<Storyboard>
<ColorAnimation Duration="0" To="#FFFFE5CD" Storyboard.TargetProperty="(Shape.Fill).(SolidColorBrush.Color)" Storyboard.TargetName="Path_6" d:IsOptimized="True"/>
<ColorAnimation Duration="0" To="#FFFFE5CD" Storyboard.TargetProperty="(Shape.Fill).(SolidColorBrush.Color)" Storyboard.TargetName="Rectangle_7" d:IsOptimized="True"/>
</Storyboard>
</VisualState>
<VisualState x:Name="Disabled"/>
</VisualStateGroup>
</VisualStateManager.VisualStateGroups>
<Viewbox Margin="-10,0" RenderTransformOrigin="0.5,0.5">
<Viewbox.RenderTransform>
<CompositeTransform ScaleX="-1"/>
</Viewbox.RenderTransform>
<Grid Height="60" Width="109">
<Viewbox x:Name="Group" Width="108.952" Height="60.3575">
<Viewbox Height="49" Width="103">
<Grid Height="58.5920524596841" Width="114.358690261841">
<Viewbox x:Name="Group1" Width="107.672" Height="16.0729" Margin="0,43,6,0">
<Canvas Width="107.672" Height="16.0729">
<Rectangle x:Name="Rectangle1" Width="83.1734" Height="14.4729" Canvas.Left="15.6519" Canvas.Top="0.799988" Stretch="Fill" Fill="#FF733800"/>
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</Viewbox>
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另一个项目
在其他项目中使用上述代码并不总是会出现相同的错误，这增加了错误的奇妙性。
尝试创建一个全新的项目，并且只重用代码，但无效的xaml仍然存在。但仍然编译和部署良好：/
初始解决方案
我们使用了NuGet的一个关于blend.expression.sdk的包，这个包引入了错误。但它是必要的，因为其中一台计算机在安装blend或visual studio时没有收到参考资料。
在我使用Visual Studio 2013/15的经验中，XAML设计器似乎是随机的，会抛出"无效标记"消息，或者根本不会加载——尽管应用程序编译和运行非常好。
重新启动Visual Studio一直为我解决了这个问题。
如果设计器在重新启动后不显示预览。。。我建议注释掉标记中的元素，直到成功为止。或者，创建一个新的空白页面，正确预览并一次添加一个元素，直到它1）与您的一个示例匹配或2）突然失败（在这种情况下，您发现了有问题的元素）。