针对具有分层数据结构的控件设计的，比如说TreeView，相当于可以每一个层级上做DataTemplate
XmlDataProvider：数据源，写在Resources下
<XmlDataProvider x:Key="Info" XPath="Nations"> <x:XData> <Nations xmlns=""> <Nation Name="中国"> <Provinces> <Province Name="安徽"> <Citys> <City Name="安庆"> <Countrys> <Country Name="潜山"/> <Country Name="桐城"/> </Countrys> </City> <City Name="合肥"> <Countrys> <Country Name="长丰"/> <Country Name="肥东"/> </Countrys> </City> </Citys> </Province> <Province Name="江苏"> <Citys> <City Name="南京"> <Countys> <Country Name="溧水"/> <Country Name="高淳"/> </Countys> </City> <City Name="苏州"> <Countys> <Country Name="常熟"/> </Countys> </City> </Citys> </Province> </Provinces> </Nation> </Nations> </x:XData> </XmlDataProvider>
HierarchicalDataTemplate：层级模板，写在Resources下
<HierarchicalDataTemplate DataType="Nation" ItemsSource="{Binding XPath=Provinces/Province}">
<StackPanel Background="AliceBlue"> <TextBlock FontSize="20" Text="{Binding XPath=@Name}"/> </StackPanel> </HierarchicalDataTemplate> <HierarchicalDataTemplate DataType="Province" ItemsSource="{Binding XPath=Citys/City}"> <StackPanel Background="LightBlue"> <TextBlock FontSize="18" Text="{Binding XPath=@Name}"/> </StackPanel> </HierarchicalDataTemplate> <HierarchicalDataTemplate DataType="City" ItemsSource="{Binding XPath=Countrys/Country}"> <StackPanel Background="LightBlue"> <TextBlock FontSize="18" Text="{Binding XPath=@Name}"/> </StackPanel> </HierarchicalDataTemplate> <HierarchicalDataTemplate DataType="Country"> <StackPanel Background="LightSalmon"> <TextBlock FontSize="18" Text="{Binding XPath=@Name}"/> </StackPanel> </HierarchicalDataTemplate>
解释
<HierarchicalDataTemplate DataType="Nation" ItemsSource="{Binding XPath=Provinces/Province}">
<StackPanel Background="AliceBlue"> <TextBlock FontSize="20" Text="{Binding XPath=@Name}"/> </StackPanel> </HierarchicalDataTemplate>
DataType表示定义的目标是Nation
ItemsSource表示下一级是Provinces/Province （总标签/单个标签名）
StackPanel 定义Nation的外观
XPath=@Name表示绑定为Name属性
比如：
<Nation Name="中国" Age="15">
<HierarchicalDataTemplate DataType="Nation" ItemsSource="{Binding XPath=Provinces/Province}"> <StackPanel Background="AliceBlue"> <TextBlock FontSize="20" Text="{Binding XPath=@Name}"/> <Label FontSize="15" Content="{Binding XPath=@Age}"></Label> </StackPanel> </HierarchicalDataTemplate> </Nation>
TreeView
<TreeView ItemsSource="{Binding Source={StaticResource ResourceKey=Info},XPath=Nation}"></TreeView>
像引用静态资源一样使用
XPath决定显示的根节点
如果想从第二/三级开始显示，而不是根节点
修改XPath（写路径，否则找不到）
<TreeView ItemsSource="{Binding Source={StaticResource ResourceKey=Info},XPath=Nation/Provinces/Province}"></TreeView>
<TreeView ItemsSource="{Binding Source={StaticResource ResourceKey=Info},XPath=Nation/Provinces/Province/Citys/City}"></TreeView>
