XmlDataProvider的简单应用

1.Xml文档：



<?xml version="1.0" encoding="utf-8" ?>
 <Root>
    <Item ID="1" Data="意大利风格"/>
    <Item ID="2" Data="挪威风格"/>
    <Item ID="3" Data="美国风格"/>
    <Item ID="4" Data="非洲风格">
        <SubItem ID="41"  Data="埃及风格"></SubItem>
    </Item>
 </Root>

2.Xaml

<Window x:Class="SdkXamlBrowser.Window1"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="Window1" Height="358" Width="709">
    <Window.Resources>
        <XmlDataProvider Source="a.xml" x:Key="aa" XPath="/Root"/>
    </Window.Resources>
    <Grid>
        <TextBlock Text="{Binding ElementName=lb,Path=SelectedValue}" />
            <StackPanel Orientation="Horizontal" Margin="20,40,342,0">
            <!-- DisplayMemberPath="@Data" 必须加【@】 -->
            <!--筛选：ID==1   "="必须转义，改为"\="-->
            <ListBox DataContext="{Binding Source={StaticResource aa},XPath=/Root/Item[@ID\=1]}" Width="100"  Name="lb"
                      ItemsSource="{Binding}" DisplayMemberPath="@Data" SelectedValuePath="@ID">
                </ListBox>
            <ListBox DataContext="{Binding Source={StaticResource aa},XPath=/Root/Item[4]}"  Name="lb1" Width="100" 
                      ItemsSource="{Binding}" DisplayMemberPath="@Data" SelectedValuePath="@ID">
            </ListBox>
            <!--筛选：ID大于2   ">"必须转义，改为"&gt;"-->
            <ListBox DataContext="{Binding Source={StaticResource aa},XPath=/Root/Item[@ID&gt;2]}"  Name="lb2" Width="100" 
                      ItemsSource="{Binding}" DisplayMemberPath="@Data" SelectedValuePath="@ID">
            </ListBox>
        </StackPanel>
    </Grid>
</Window>