在ResourceDictionary中通过ControlTemplate的菜单项样式不能正确应用
本文关键字：不能 样式 应用 菜单项 ResourceDictionary ControlTemplate | 更新日期: 2023-09-27 18:19:25
我有一个按钮，它的XAML是这样的
<Button x:Name="Button2" Style="{StaticResource User_Hyperlink_Button}" Tag="123456789.XAML" Width="86" Height="30" Margin="26,327,0,0" HorizontalAlignment="Left" VerticalAlignment="Top" Content="Button2" />
Button的样式在ResourceDictionary中定义，如下所示
<Style x:Key="User_Hyperlink_Button" TargetType="{x:Type Button}">
<Setter Property="Control.Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type Button}">
<Button Style="{DynamicResource App_button}" >
<Hyperlink Style="{DynamicResource Button_LinkForeground}" NavigateUri="{Binding Path=Tag, RelativeSource={RelativeSource Mode=TemplatedParent, AncestorLevel=0}}">
<InlineUIContainer>
<TextBlock Text="{Binding Path=Content, RelativeSource={RelativeSource Mode=TemplatedParent, AncestorLevel=0}}" />
</InlineUIContainer>
</Hyperlink>
</Button>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
在这一切都工作得很好，但当我做同样的菜单项的文本为菜单项消失。
菜单项的示例如下
<MenuItem x:Name="MenuItem1" Style="{StaticResource User_Hyperlink_MenuItem}" Tag="123456789.XAML" Header="MenuItem1" />
风格是这样的
<Style x:Key="User_Hyperlink_MenuItem" TargetType="{x:Type MenuItem}">
<Setter Property="Control.Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type MenuItem}">
<MenuItem Style="{DynamicResource App_MenuItem}" >
<Hyperlink Style="{DynamicResource Menu_LinkForeground}" NavigateUri="{Binding Path=Tag, RelativeSource={RelativeSource Mode=TemplatedParent, AncestorLevel=0}}">
<InlineUIContainer>
<TextBlock Text="{Binding Path=Header, RelativeSource={RelativeSource Mode=TemplatedParent, AncestorLevel=0}}" />
</InlineUIContainer>
</Hyperlink>
</MenuItem>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
我也改变了样式，像这样
...
<TextBlock Text="{Binding Path=Content, RelativeSource={RelativeSource Mode=TemplatedParent, AncestorLevel=0}}" />
...
，但它不工作。我需要通过修改样式来解决这个问题，并且由于某些限制，不能更改菜单项的xaml。
更新1我需要使MenuItem文本出现在它上面。文本在TextBlock中，但它的值来自MenuItem的Content属性。MenuItem没有Content属性，而是有Items Collection，这就是为什么文本不显示的原因。而在按钮的情况下，一切都在工作链接，文本所有。
我正在松散的XAML工作，所以我必须使用超链接链接。无需担心递归或继承，因为这不是问题。问题只是MenuItem没有Content属性，所以需要通过获取Item[0]来解决这个问题。
更新2我还提供了其他参考资料
<Style x:Key="App_MenuItem" TargetType="{x:Type MenuItem}">
<Setter Property="HorizontalContentAlignment" Value="{Binding HorizontalContentAlignment, RelativeSource={RelativeSource AncestorType={x:Type ItemsControl}}}"/>
<Setter Property="VerticalContentAlignment" Value="{Binding VerticalContentAlignment, RelativeSource={RelativeSource AncestorType={x:Type ItemsControl}}}"/>
<Setter Property="Background" Value="#FF015DAB"/>
<Setter Property="Foreground" Value="White"/>
<Setter Property="Template" Value="{DynamicResource {ComponentResourceKey ResourceId=SubmenuItemTemplateKey, TypeInTargetAssembly={x:Type MenuItem}}}"/>
<Style.Triggers>
<Trigger Property="Role" Value="TopLevelHeader">
<Setter Property="Margin" Value="0,1,0,1"/>
<Setter Property="Padding" Value="6,3,6,3"/>
<Setter Property="Template" Value="{DynamicResource {ComponentResourceKey ResourceId=TopLevelHeaderTemplateKey, TypeInTargetAssembly={x:Type MenuItem}}}"/>
</Trigger>
<Trigger Property="Role" Value="TopLevelItem">
<Setter Property="Margin" Value="0,1,0,1"/>
<Setter Property="Padding" Value="6,3,6,3"/>
<Setter Property="Template" Value="{DynamicResource {ComponentResourceKey ResourceId=TopLevelItemTemplateKey, TypeInTargetAssembly={x:Type MenuItem}}}"/>
</Trigger>
<Trigger Property="Role" Value="SubmenuHeader">
<Setter Property="DockPanel.Dock" Value="Top"/>
<Setter Property="Padding" Value="0,2,0,2"/>
<Setter Property="Template" Value="{DynamicResource {ComponentResourceKey ResourceId=SubmenuHeaderTemplateKey, TypeInTargetAssembly={x:Type MenuItem}}}"/>
</Trigger>
<Trigger Property="Role" Value="SubmenuItem">
<Setter Property="DockPanel.Dock" Value="Top"/>
<Setter Property="Padding" Value="0,2,0,2"/>
</Trigger>
</Style.Triggers>
</Style>
<Style x:Key="Menu_LinkForeground" TargetType="{x:Type Hyperlink}">
<Setter Property="Foreground" Value="White" />
<Setter Property="TextDecorations" Value="None" />
</Style>
您使用的菜单项样式不正确。样式的模板不能引用对象本身，因为它创建了一个循环引用。只需在控件模板中使用超链接作为根可视化。
更新1 -我在说引用控件本身从其模板不工作。它的工作原理。它注入了在默认模板中写入的自定义内容。
这仍然没有多大意义。
下面是MenuItem的工作版本(注意，我从模板中剥离了所有资源，因为我没有它们)。只要一个一个地添加你的资源，看看什么时候它会停止工作。
<Window x:Class="WpfApplication2.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">
<Grid>
<Grid.Resources>
<Style x:Key="User_Hyperlink_MenuItem" TargetType="{x:Type MenuItem}">
<Setter Property="Control.Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type MenuItem}">
<MenuItem>
<Button>ABC</Button>
</MenuItem>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</Grid.Resources>
<MenuItem Style="{StaticResource User_Hyperlink_MenuItem}">A</MenuItem>
</Grid>
</Window>
作为参考，下面是默认菜单项的样式:
<Style TargetType="{x:Type MenuItem}" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:s="clr-namespace:System;assembly=mscorlib">
<Style.Triggers>
<Trigger Property="MenuItem.Role">
<Setter Property="Control.Padding">
<Setter.Value>
<Thickness>
7,2,8,3</Thickness>
</Setter.Value>
</Setter>
<Setter Property="Control.Template">
<Setter.Value>
<DynamicResource ResourceKey="{ComponentResourceKey TypeInTargetAssembly=MenuItem, ResourceId=TopLevelHeaderTemplateKey}" />
</Setter.Value>
</Setter>
<Trigger.Value>
<x:Static Member="MenuItemRole.TopLevelHeader" />
</Trigger.Value>
</Trigger>
<Trigger Property="MenuItem.Role">
<Setter Property="Control.Padding">
<Setter.Value>
<Thickness>
7,2,8,3</Thickness>
</Setter.Value>
</Setter>
<Setter Property="Control.Template">
<Setter.Value>
<DynamicResource ResourceKey="{ComponentResourceKey TypeInTargetAssembly=MenuItem, ResourceId=TopLevelItemTemplateKey}" />
</Setter.Value>
</Setter>
<Trigger.Value>
<x:Static Member="MenuItemRole.TopLevelItem" />
</Trigger.Value>
</Trigger>
<Trigger Property="MenuItem.Role">
<Setter Property="Control.Padding">
<Setter.Value>
<Thickness>
2,3,2,3</Thickness>
</Setter.Value>
</Setter>
<Setter Property="Control.Template">
<Setter.Value>
<DynamicResource ResourceKey="{ComponentResourceKey TypeInTargetAssembly=MenuItem, ResourceId=SubmenuHeaderTemplateKey}" />
</Setter.Value>
</Setter>
<Trigger.Value>
<x:Static Member="MenuItemRole.SubmenuHeader" />
</Trigger.Value>
</Trigger>
<Trigger Property="MenuItem.Role">
<Setter Property="Control.Padding">
<Setter.Value>
<Thickness>
2,3,2,3</Thickness>
</Setter.Value>
</Setter>
<Trigger.Value>
<x:Static Member="MenuItemRole.SubmenuItem" />
</Trigger.Value>
</Trigger>
</Style.Triggers>
<Style.Resources>
<ResourceDictionary />
</Style.Resources>
<Setter Property="Control.HorizontalContentAlignment">
<Setter.Value>
<Binding Path="HorizontalContentAlignment" RelativeSource="{RelativeSource Mode=FindAncestor, AncestorType=ItemsControl, AncestorLevel=1}" />
</Setter.Value>
</Setter>
<Setter Property="Control.VerticalContentAlignment">
<Setter.Value>
<Binding Path="VerticalContentAlignment" RelativeSource="{RelativeSource Mode=FindAncestor, AncestorType=ItemsControl, AncestorLevel=1}" />
</Setter.Value>
</Setter>
<Setter Property="Panel.Background">
<Setter.Value>
<SolidColorBrush>
#00FFFFFF</SolidColorBrush>
</Setter.Value>
</Setter>
<Setter Property="ScrollViewer.PanningMode">
<Setter.Value>
<x:Static Member="PanningMode.Both" />
</Setter.Value>
</Setter>
<Setter Property="Stylus.IsFlicksEnabled">
<Setter.Value>
<s:Boolean>
False</s:Boolean>
</Setter.Value>
</Setter>
<Setter Property="Control.Template">
<Setter.Value>
<DynamicResource ResourceKey="{ComponentResourceKey TypeInTargetAssembly=MenuItem, ResourceId=SubmenuItemTemplateKey}" />
</Setter.Value>
</Setter>
</Style>