TreeView绑定到XMLDataProvider - 在编辑器中显示数据，但在运行时为空 [英] TreeView bound to XMLDataProvider - shows data in editor, but empty when run

问题描述

我已经将TreeView绑定到XMLDataProvider。
TreeView在Visual Studio编辑器中显示预期的数据。但是当我按F5时，应用程序运行，但树视图为空。有谁知道为什么在运行应用程序时看不到它？

这是整个代码：

 < Window x：Class =TreeViewDataBinding.Window1
 xmlns =http://schemas.microsoft.com/winfx/2006/xaml/presentation
 xmlns：x =http://schemas.microsoft.com/winfx/2006/xaml
 Title =Window1Height =300Width =300> 
< Window.Resources> 
< XmlDataProvider x：Key =FolderList> 
< x：XData> 
< TreeFolders> 
< Folder Name =Audit Reports/> 
< Folder Name =Joes Test> 
< Folder Name =Analysis01/> 
< Folder Name =Test090803/> 
< / Folder> 
< Folder Name =Carl/> 
< Folder Name =Steve/> 
< / TreeFolders> 
 
< / x：XData> 
< / XmlDataProvider> 
< HierarchicalDataTemplate 
 x：Key =FolderTreeItemTemplate
 DataType =Folder> 
< HierarchicalDataTemplate.ItemsSource> 
< Binding XPath =child :: */> 
< /HierarchicalDataTemplate.ItemsSource> 
< TextBlock Text ={Binding XPath = @ Name}/> 
< / HierarchicalDataTemplate> 
< /Window.Resources> 
< Grid> 
< TreeView 
 ItemsSource ={Binding Source = {StaticResource FolderList}，XPath = // TreeFolders / *}
 ItemTemplate ={StaticResource FolderTreeItemTemplate}/> 
< / Grid> 
< / Window> 
  

解决方案

我没有运行代码，但我的猜测你需要指定一个命名空间：

  xmlns =
  pre> 
 
 
将xmlns附加到您的拳头数据标签中：
  XmlDataProvider x：Key =FolderList> 
< x：XData> 
< TreeFolders xmlns => 
< Folder Name =Audit Reports/> 
< Folder Name =Joes Test> 
< Folder Name =Analysis01/> 
< Folder Name =Test090803/> 
< / Folder> 
< Folder Name =Carl/> 
< Folder Name =Steve/> 
< / TreeFolders> 
 
< / x：XData> 
< / XmlDataProvider> 
  
 
I have bound a TreeView to an XMLDataProvider. 
The TreeView displays the data as expected in the Visual Studio editor. But when I press F5, the application runs but the treeview is blank. Does anyone know why I can't see it when I run the application?

Here's the entire code:
<Window x:Class="TreeViewDataBinding.Window1"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="Window1" Height="300" Width="300">
    <Window.Resources>
    <XmlDataProvider x:Key="FolderList">
        <x:XData>
            <TreeFolders>
                <Folder Name="Audit Reports" />
                <Folder Name="Joes Test" >
                    <Folder Name="Analysis01" />
                    <Folder Name="Test090803" />
                </Folder>
                <Folder Name="Carl" />
                <Folder Name="Steve" />
            </TreeFolders>

        </x:XData>
    </XmlDataProvider>
    <HierarchicalDataTemplate
                    x:Key="FolderTreeItemTemplate"
                    DataType="Folder">
        <HierarchicalDataTemplate.ItemsSource>
            <Binding XPath="child::*" />
        </HierarchicalDataTemplate.ItemsSource>
        <TextBlock Text="{Binding XPath=@Name}" />
    </HierarchicalDataTemplate>
        </Window.Resources>
    <Grid>
        <TreeView
            ItemsSource="{Binding Source={StaticResource FolderList}, XPath=//TreeFolders/*}"
            ItemTemplate="{StaticResource FolderTreeItemTemplate}" />
    </Grid>
</Window>

解决方案
I didn't run the code, but my guess is that you need to specify a namespace:
xmlns=""
Attach xmlns to your fist data tag:
    <XmlDataProvider x:Key="FolderList">
    <x:XData>
        <TreeFolders xmlns="">
            <Folder Name="Audit Reports" />
            <Folder Name="Joes Test" >
                <Folder Name="Analysis01" />
                <Folder Name="Test090803" />
            </Folder>
            <Folder Name="Carl" />
            <Folder Name="Steve" />
        </TreeFolders>

    </x:XData>
</XmlDataProvider>


                        
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