WPF（ MVVM）中TreeView 加载xml文档的方式及遇到的问题

有如下xml代码：

 1 <?xml version="1.0" encoding="utf-8" ?>
 2 <FileSystem xmlns="">
 3   <Folder Name="Books">
 4     <Folder Name="Programming">
 5       <Folder Name="Windows">
 6         <Folder Name="WPF"/>
 7         <Folder Name="MFC"/>
 8         <Folder Name="Delphi"/>
 9       </Folder>
10     </Folder>
11     <Folder Name="Tools">
12       <Folder Name="Development"/>
13       <Folder Name="Designment"/>
14       <Folder Name="Players"/>
15     </Folder>
16     <Folder Name="Books1">
17       <Folder Name="Development"/>
18       <Folder Name="Designment"/>
19       <Folder Name="Players"/>
20     </Folder>
21     <Folder Name="Books2">
22       <Folder Name="Development"/>
23       <Folder Name="Designment"/>
24       <Folder Name="Players"/>
25     </Folder>
26     <Folder Name="Books3">
27       <Folder Name="Development"/>
28       <Folder Name="Designment"/>
29       <Folder Name="Players"/>
30     </Folder>
31   </Folder>
32 </FileSystem>

示例xml

实现加载的方式有：

1.在Xaml中定义一个静态的XmlDataProvider：如下：

 1  <UserControl.Resources>
 2 
 3     <XmlDataProvider x:Key="DicData"
 4                Source="../DesignData/report.xml"
 5                XPath="FileSystem/Folder" />
 6 
 7     <DataTemplate x:Key="dicItemTemplate">
 8         <Label Content="{Binding XPath=Name}"/>
 9     </DataTemplate>
10 </UserControl.Resources>

然后在TreeView ,ListBox等控件中使用：

<ListBox x:Name="DicListBox" Margin="60,12,114,64" DockPanel.Dock="Left"
             ItemsSource="{Binding 
         Source={StaticResource ReportData}}"

             ItemTemplate="{StaticResource teamItemTemplate}"
             IsSynchronizedWithCurrentItem="True"
             Visibility="Visible" SelectionMode="Single">
</ListBox>

这样子是没有问题能正常显示。

2.使用MVVM 数据绑定，直接加载xml文件

ViewModel中代码：

1 XmlDataProvider xmlDataProvider = new XmlDataProvider();
2             xmlDataProvider.XPath = "FileSystem/Folder";
3             XmlDocument xmlDocument = new XmlDocument();
4             var path = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "DataContext\Setting\FileSystem.xml");
5             xmlDocument.Load(path);
6             xmlDataProvider.Document = xmlDocument;
7             DicTypeData = xmlDataProvider;

Xaml代码：在Binding的时候需要按照（

DataContext="{Binding DicTypeData}" ItemsSource="{Binding}

）的方式，才能加载出来数据，否则加载不出来。

<TreeView Name="dicTypeTreeView" MinHeight="200" DataContext="{Binding DicTypeData}" ItemsSource="{Binding}">
                            <TreeView.ItemTemplate>
                                <HierarchicalDataTemplate ItemsSource="{Binding XPath=Folder}">
                                    <StackPanel Orientation="Horizontal" Margin="2">
                                        <Image Source="pack://application:,,,/Sv.App;component/Image/Project/lq.png" Width="16" Height="16" SnapsToDevicePixels="True"></Image>
                                        <TextBlock Text="{Binding XPath=@Name}" Margin="5,0"></TextBlock>
                                    </StackPanel>
                                </HierarchicalDataTemplate>
                            </TreeView.ItemTemplate>
                        </TreeView>

3.直接在资源中，构建XmlDataProvider数据

<XmlDataProvider x:Key="xdp" XPath="FileSystem/Folder">
            <x:XData>
                <FileSystem xmlns="">
                    <Folder Name="Books">
                        <Folder Name="Programming">
                            <Folder Name="Windows">
                                <Folder Name="WPF"/>
                                <Folder Name="MFC"/>
                                <Folder Name="Delphi"/>
                            </Folder>  
                        </Folder>
                        <Folder Name="Tools">
                            <Folder Name="Development"/>
                            <Folder Name="Designment"/>
                            <Folder Name="Players"/>
                        </Folder>
                    </Folder>
                </FileSystem>
            </x:XData>
        </XmlDataProvider>