Binding data with WCF Service

XML data can be bound through WCF Services by using a WPF application enabled with WCF Services.

The steps to bind XML data with WCF Services are as follows:

  1. Create the XML and class objects (for WCF, refer the XML data-binding class and the XML used in the Binding XML data section).
  2. Add an ASP.NET Web application to the sample application, and then add a new WCF Service item to the Web application, to create a WCF Service application.
  3. Create an Observable Collection from XML data to bind with ItemsSource, as shown below in the service class that has a return type of ObservableCollection.

         [ServiceContract(Namespace = "")]
    
         [AspNetCompatibilityRequirements(RequirementsMode = AspNetCompatibilityRequirementsMode.Allowed)]
    
         public class Service1
    
         {
    
         [OperationContract]
    
         public ObservableCollection<HierarchyItem> CreateXMLDataItems()
    
         {
    
         ObservableCollection<HierarchyItem> categories = new ObservableCollection<HierarchyItem>();
    
         XDocument XMLItemSource = XDocument.Load("YourXMLLocation/HierarchyItems.xml");
    
         categories = this.GetCategories(XMLItemSource.Element("categories"));
    
         return categories;
    
         }
    
    
    
         private ObservableCollection<HierarchyItem> GetCategories(XElement element)
    
         {
    
         var item = from category in element.Elements("category")
    
         select category;
    
    
    
         var itemsObservableCollection = new ObservableCollection<HierarchyItem>();
    
    
    
         foreach (var itm in item)
    
         {
    
         var subitm = new HierarchyItem();
    
         subitm.ContentStr = itm.Attribute("name").Value;
    
         subitm.HierarchyItems = this.GetCategories(itm);
    
         itemsObservableCollection.Add(subitm);
    
         }
    
    
    
         return itemsObservableCollection;
    
         }
    
         }
  4. Connect WCF Services with the sample application, as shown in the following code snippet:

              namespace 
              WCFServicesInHierarchy
              {    public partial class MainPage : UserControl    
              {        public MainPage()        
              {            InitializeComponent();       
              }   
              }    
              public class CustomSource   
              {        public CustomSource()        
              {            
              //This loads WCF Service            
              Service1Client client = new Service1Client();            
              client.CreateXMLDataItemsCompleted += new EventHandler<CreateXMLDataItemsCompletedEventArgs>(client_CreateXMLDataItemsCompleted);         
              client.CreateXMLDataItemsAsync();            
              this.Categories = new ObservableCollection<HierarchyItem>();        
              }      
              private void client_CreateXMLDataItemsCompleted(object sender, CreateXMLDataItemsCompletedEventArgs e)        
              {            if (e.Error == null && e.Result != null)           
              {                foreach (HierarchyItem c in e.Result)              
              {                    this.Categories.Add(c);              
              }          
              }       
              }        
              public ObservableCollection<HierarchyItem> Categories        
              {            get;            set;        
              }   
              }}
    		
    			
            <Window<br>     
            xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"     
            xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"<br>    
            xmlns:syncfusion="http://schemas.syncfusion.com/wpf"<br>     
            xmlns:local="clr-namespace:WCFServicesInHierarchy" <br>     
            x:Class="WCFServicesInHierarchy.MainWindow"<br>x:Name="Window" 
            Title="MainWindow" UseLayoutRounding="True" Width="640" Height="480"><br>   
             <Window.DataContext><br>        <local:CustomSource/><br>  
              </Window.DataContext><br><br>    <Grid x:Name="LayoutRoot"><br>        
            <syncfusion:HierarchyNavigator Name="hierarchyNavigator1" VerticalAlignment="Center" ItemsSource="{Binding Categories}"><br>            
            <syncfusion:HierarchyNavigator.ItemTemplate><br>               
             <HierarchicalDataTemplate ItemsSource="{Binding HierarchyItems}"><br>          
                      <Border><br>                     
               <TextBlock Text="{Binding ContentStr}" Margin="2,0"/><br>                 
               </Border><br>                </HierarchicalDataTemplate><br>            
            </syncfusion:HierarchyNavigator.ItemTemplate><br>      
              </syncfusion:HierarchyNavigator><br>    
            </Grid><br>
            </Window>