调用现成的WCF方法制作RadTreeView功能

首先设计页面

<telerik:RadTreeView x:Name="radTreeView" Margin="8"
        IsLoadondemandEnabled="True" IsExpandOnSingleClickEnabled="True"
        Loadondemand="radTreeView_Loadondemand"/>

页面载入的逻辑，其中优先定义全局变量

        private EmiteServiceContractClient wsEmiteClient;
        private RadTreeViewItem treeViewItem=new RadTreeViewItem();

        private ObservableCollection<MetricNode> RootNode { get; set; }

        private ObservableCollection<MetricNode> ChildNode { get; set; }

调用WebService，设置接入的地址，以及连接登入，然后执行方法

     public MainPage()
        {
            InitializeComponent();
            wsEmiteClient = new EmiteServiceContractClient();
            wsEmiteClient.Endpoint.Address = new System.ServiceModel.EndpointAddress(new Uri(App.webServiceURL));
            TempToken.CreateScopeAndSecurityToken(wsEmiteClient.InnerChannel);
            wsEmiteClient.GetRootNodes_OneView2Completed -= wsEmiteClient_GetRootNodes_OneView2Completed;
            wsEmiteClient.GetRootNodes_OneView2Completed += wsEmiteClient_GetRootNodes_OneView2Completed;
            wsEmiteClient.GetRootNodes_OneView2Async();
        }

当radTreeView控件执行载入时触发逻辑。首先调用webservice获得余下子节点，然后获得点击的RadTreeViewitem项，并执行获得子节点的方法

  private void radTreeView_Loadondemand(object sender,Telerik.Windows.RadRoutedEventArgs e)
        {
            wsEmiteClient.GetChildNodes_OneView2Completed -= wsEmiteClient_GetChildNodes_OneView2Completed;
            wsEmiteClient.GetChildNodes_OneView2Completed += wsEmiteClient_GetChildNodes_OneView2Completed;

            RadTreeViewItem clickItem = e.OriginalSource as RadTreeViewItem;;
            treeViewItem = clickItem;
            GetChildrenMetrics2(clickItem.Tag.ToString());

        }

定义添加子节点的方法

        private void AddTreeViewItems()
        {
            foreach (MetricNode m in RootNode)
            {    
                RadTreeViewItem category = new RadTreeViewItem();
                (category).Header = m.MetricName;
                category.Foreground = new SolidColorBrush(Colors.Green);
                category.Tag = m.NodeId;
                radTreeView.Items.Add(category);
            }
    
        }

webservice（GetRootNodes的回调函数）

   private void wsEmiteClient_GetRootNodes_OneView2Completed(object sender,GetRootNodes_OneView2CompletedEventArgs e)
        {
            if (e.Error == null)
            {
                if (e.Result != null && e.Result.Count > 0)
                {
                    RootNode = e.Result;
                    AddTreeViewItems();
           
                }
            }
            else
            {
                //Common.LogError(ErrorHandler.GetFullErrorMessage(e.Error,"SvcModelviewmodel"));
            }
        }

根据parentId得到子节点的方法

  private void GetChildrenMetrics2(string parentId)
        {
            TempToken.CreateScopeAndSecurityToken(wsEmiteClient.InnerChannel);
            wsEmiteClient.GetChildNodes_OneView2Completed -= wsEmiteClient_GetChildNodes_OneView2Completed;
            wsEmiteClient.GetChildNodes_OneView2Completed += wsEmiteClient_GetChildNodes_OneView2Completed;
            wsEmiteClient.GetChildNodes_OneView2Async(new MetricNodeRequest() { NodeId = int.Parse(parentId) });
        }

得到子节点（GetChildNodes）的webservice的回调函数。

 private void wsEmiteClient_GetChildNodes_OneView2Completed(object sender,GetChildNodes_OneView2CompletedEventArgs e)
        {
            
            if (e.Error == null)
            {
                if (e.Result != null && e.Result.Count > 0)
                {
                    ChildNode = e.Result;
                    if (ChildNode!=null&&ChildNode.Count>0)
                    {
                        foreach (MetricNode metricNode in ChildNode)
                        {
                            RadTreeViewItem product = new RadTreeViewItem();
                            product.Header = metricNode.MetricName;
                            product.Tag = metricNode.NodeId;
                            treeViewItem.Items.Add(product);
                        }
                    }

                }
            }
            else
            {
                //Common.LogError(ErrorHandler.GetFullErrorMessage(e.Error,"SvcModelviewmodel"));
            }
        }