如何在视图中将viewmodel的XmlDataProvider属性与XmlDataProvider绑定?

时间:2013-07-12 13:22:45

标签: c# wpf mvvm-light xmldataprovider

我试图在TreeView中显示一些xml数据。 Xml数据由ViewModel的XmlDataProvider类型的属性提供。但是,我无法将其与TreeView绑定。我在XAML中使用XmlDataProvider,无法在XAML中将ViewModel属性与XmlDataProvider绑定。以下是代码段:

public class MainViewModel : ViewModelBase {


    private static XmlDataProvider  xDoc;
    public static XmlDataProvider  XDoc {
      get {
        return xDoc;
      }
      set {
        xDoc = value;
        RaisePropertyChanged( "XDoc" );
      }

    }


    public MainViewModel( ) {
      Data d = new Data( );
      d.int1 = 12;
      d.int2 = 20;
      d.str = "Hello World";

      XmlSerializer serializer = new XmlSerializer( d.GetType( ) );
      StringWriter strWriter = new StringWriter( );
      serializer.Serialize( strWriter, d );
      XDoc = new XmlDataProvider { Document =XDocument.Parse( strWriter.ToString( ) ).ToXmlDocument (), XPath="child::node"} ;    
    }
  }

Xaml代码:

<XmlDataProvider x:Key="xmlDP" Source="{ x:Static A:MainViewModel.XDoc}"  XPath="">
    </XmlDataProvider>
<TreeView Grid.Row="2" Grid.ColumnSpan="2" Name="xmlTree" 
       DataContext="{StaticResource xmlDP}" ItemsSource="{Binding}" ItemTemplate="{StaticResource treeViewTemplate}"/>

我正在使用mvvm light框架。当我尝试时,我得到异常,XDoc属性应该是静态的,我不想让它静态。

如果在xaml文件中的XmlDataProvider中定义我的X:数据,那么treeview可以工作:

 <XmlDataProvider x:Key="xmlDP" XPath="">
            <x:XData>
                <Employees>
                    <Employee Name="Steven Ballmer" DOB="1-Mar-1956">
                        <Title>CEO</Title>
                    </Employee>
                </Employees>
            </x:XData>
        </XmlDataProvider>

 <TreeView Grid.Row="2" Grid.ColumnSpan="2" Name="xmlTree" 
           DataContext="{StaticResource xmlDP}" ItemsSource="{Binding}" ItemTemplate="  {StaticResource treeViewTemplate}"/>

2 个答案:

答案 0 :(得分:0)

check this link ..在这个链接中你想要完成的工作..在树视图中显示xml数据已完成..所以只是检查出来..

答案 1 :(得分:0)

如果我不使用XMLDataProvider并仅使用XMLDoxument,那么一切正常:

public class MainViewModel : ViewModelBase {


    private  XmlDocument  xDoc;
    public  XmlDocument  XDoc {
      get {
        return xDoc;
      }
      set {
        xDoc = value;
        RaisePropertyChanged( "XDoc" );
      }
    }

    public MainViewModel( ) {
      Data d = new Data( );
      d.int1 = 12;
      d.int2 = 20;
      d.str = "Hello World";


      XmlSerializer serializer = new XmlSerializer( d.GetType( ) );
      StringWriter strWriter = new StringWriter( );
      serializer.Serialize( strWriter, d );
      XDoc = XDocument.Parse( strWriter.ToString( ) ).ToXmlDocument () ;   
    }
  }

 <TreeView Grid.Row="2" Grid.ColumnSpan="2" Name="xmlTree" 
               ItemsSource="{Binding XDoc}" ItemTemplate="{StaticResource treeViewTemplate}"/>