What is the correct way to replace a static XmlDataProvider in a WPF Usercontrol with a dynamic dataset?

Question

The question may need to be edited, since I do not think that I definitely know how to do this.

The current configuration of my WPF user control. I have an XmlDataProvider that contains some static XML elements that I use to populate the TreeView control. I am currently using HierarchicalDataTemplate to bind to TreeViewItem

    <HierarchicalDataTemplate x:Key="SiteTemplate" ItemsSource="{Binding XPath=pci}">
        <TextBlock Text="{Binding XPath=@Name}"/>
    </HierarchicalDataTemplate>
    <Style TargetType="TreeViewItem">
        <Setter Property="IsExpanded" Value="True"/>
    </Style>

TreeView Management

 <TreeView ItemsSource="{Binding Source={StaticResource SharePointSites}}" 
                              ItemTemplate="{StaticResource SiteTemplate}" 

, xml . , , XML . MVVM IObservable. - ?

: , . - , ?

Answer 1

Visual Studio, ... , , ...

, Xml- - ....

<MyItem Name="Root"> 
    <MyItem Name="ABC"/> 
    <MyItem Name="PQR"> 
        <MyItem Name="IJK"/> 
    </MyItem> 
    <MyItem Name="XYZ"/> 
</MyItem> 

• ItemsSource , , MyXmlToObjectDataSourceConverter.

  <TreeView ItemsSource="{Binding Source={StaticResource SharePointSites},
         Converter={StaticResource MyXmlToObjectDataSourceConverter}}" ... />
  

• MyXmlToObjectDataSourceConverter.Convert() ...

  public object Convert(...) 
  { 
      return new ObservableCollection<XmlNodeWrapper>(
          ((XmlDataProvider)value).Document.SelectNodes("MyItem").Select( 
              d => new XmlNodeWrapper(d)).ToList()) 
  }
  

• XmlNodeWrapper "node" , , Setters, node ... ...

  public class XmlNodeWrapper : INotifyPropertyChanged
  { 
      private XmlNode node; 
      private ObservableCollection<XmlNodeWrapper> children; 
  
      public XmlNodeWrapper(XmlNode node) 
      { 
          this.node = node; 
      } 
  
      public ObservaleCollection<XmlNodeWrapper> Children 
      { 
          get 
          { 
              if (children == null) 
              { 
                  this.children 
                      = new ObservableCollection<XmlNodeWrapper>( 
                          this.node.ChildNodes.Select( 
                              d => new XmlNodeWrapper(d)).ToList()); 
              } 
  
              return children; 
          } 
      } 
  
      public string Name 
      { 
          get 
          { 
              return node.Attributes["Name"]; 
          } 
  
          set 
          { 
              node.Attributes["Name"] = value; 
              this.PropertyChanged["Name"]; 
          } 
      } 
  
      public event PropertyChangedEventHandler PropertyChanged; 
  
      private void PropertyChanged(String info) 
      { 
          if (PropertyChanged != null) 
          { 
              PropertyChanged(this, new PropertyChangedEventArgs(info)); 
          } 
      }
  } 
  

• XPath XAML .

  <HierarchicalDataTemplate x:Key="SiteTemplate"
      ItemsSource="{Binding Path=Children}"> 
          <TextBlock Text="{Binding Path=Name}"/> 
  </HierarchicalDataTemplate>