Wpf 数据触发器集模板
我必须设置模板,我使用了DataTrigger,但它不起作用 我的代码:Wpf 数据触发器集模板,wpf,templates,styles,datatrigger,Wpf,Templates,Styles,Datatrigger,我必须设置模板,我使用了DataTrigger,但它不起作用 我的代码: <Style TargetType="{x:Type local:My_type}"> <Style.Triggers> <DataTrigger Binding="{Binding GUID, RelativeSource={RelativeSource AncestorType={x:Type local:MyClassViewControl}}}"
<Style TargetType="{x:Type local:My_type}">
<Style.Triggers>
<DataTrigger Binding="{Binding GUID, RelativeSource={RelativeSource AncestorType={x:Type local:MyClassViewControl}}}"
Value="id1">
<Setter Property="Template" Value="{StaticResource FirstTemplate}" />
</DataTrigger>
<DataTrigger Binding="{Binding GUID,
RelativeSource={RelativeSource AncestorType={x:Type local:MyClassViewControl}}}"
Value="id2">
<Setter Property="Template" Value="{StaticResource SecondTemplate}" />
</DataTrigger>
</Style.Triggers>
</Style>
这就是一个例子。
为什么我的代码不起作用?
GUID没有错(“id1”或“id2”)我认为
"{Binding GUID, RelativeSource={RelativeSource
AncestorType={x:Type local:MyClassViewControl}}}"
应该是
"{Binding GUID, RelativeSource={RelativeSource FindAncestor,
AncestorType={x:Type local:MyClassViewControl}}}"
我找到了解决办法:
在C#中创建模板选择器:
在我的XAML文件中:
<local:GUIDTemplateSelector x:Key="TheGUIDControlTemplateSelector"/>
<Style TargetType="{x:Type My_type}">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type local:My_type}">
<ContentControl ContentTemplateSelector="{StaticResource TheGUIDTemplateSelector}" Content="{Binding GUID,RelativeSource={RelativeSource AncestorType={x:Type local:My_type}}}"/>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
确保正在访问的MyClassViewControl的DataContext设置为具有GUID属性的内容。否则,我认为这段代码看起来还可以。绑定是正确的!MyClassViewControl具有属性GUID。DataContext似乎正常运行运行此操作时,输出窗口中是否存在绑定异常?MyClassViewControl
是否有名为GUID
的属性,或者是否有名为DataContext
的属性?是否没有绑定异常。是的,在MyClassViewControls中有属性GUID。biniding是可以的!我认为当DataTrigger测试其值时,GUID不会初始化。如何在XAML中等待其初始化?
<local:GUIDTemplateSelector x:Key="TheGUIDControlTemplateSelector"/>
<Style TargetType="{x:Type My_type}">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type local:My_type}">
<ContentControl ContentTemplateSelector="{StaticResource TheGUIDTemplateSelector}" Content="{Binding GUID,RelativeSource={RelativeSource AncestorType={x:Type local:My_type}}}"/>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>