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POHow to get Silverlight TreeViewItem by Id?
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  1. POHow to get Silverlight TreeViewItem by Id?
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    copied!<p>I have a Silverlight treeview that is dynamically populated with treeviewitems(representing views). I have things working fine but when I click on an treeviewitem say, View 2.01, I want to be able to get the ItemId(for View 2.01) and have the View 2.01 shown in the ViewSwitchingRegion or simply view switch by ItemId. Here’s what I have done. What am I missing?</p> <pre><code>&lt;UserControl.Resources&gt; &lt;sdk:HierarchicalDataTemplate x:Key="childNodeDataTemplate" ItemsSource="{Binding Children}"&gt; &lt;TextBlock Text="{Binding Path=Header}"/&gt; &lt;/sdk:HierarchicalDataTemplate&gt; &lt;/UserControl.Resources&gt; &lt;sdk:TreeView Name="DataTreeView" ItemsSource="{Binding DataItems}" ItemTemplate="{StaticResource childNodeDataTemplate}"&gt; &lt;i:Interaction.Triggers&gt; &lt;i:EventTrigger EventName="SelectedItemChanged"&gt; &lt;i:InvokeCommandAction Command="{Binding Path=ShowViewCommand}" CommandParameter="{Binding ElementName=DataTreeView}"/&gt; &lt;/i:EventTrigger&gt; &lt;i:EventTrigger EventName="MouseDoubleClick"&gt; &lt;i:InvokeCommandAction Command="{Binding Path=ShowViewCommand}" CommandParameter="{Binding ElementName=DataTreeView}"/&gt; &lt;/i:EventTrigger&gt; &lt;/i:Interaction.Triggers&gt; &lt;/sdk:TreeView&gt; &lt;/UserControl&gt; public class DataViewModel : ViewModelBase { #region Fields private readonly IRegionManager _regionManager; ... #endregion #region .Ctors public DataViewModel() { //IRegionManager regionManager, ... _regionManager = ServiceLocator.Current.GetInstance&lt;IRegionManager&gt;(); //SomeMethodToLoadDataItems(); } #endregion #region Methods ObservableCollection&lt;DataItem&gt; _dataItems; public ObservableCollection&lt;DataItem&gt; DataItems { get { return _dataItems; } set { if (_dataItems != value) { _dataItems = value; RaisePropertyChanged("DataItems"); } } } RelayCommand _showViewCommand; public ICommand ShowViewCommand { get { if (_showViewCommand == null) { _showViewCommand = new RelayCommand ( p =&gt; ShowView(p) ); } return _showViewCommand; } } private void ShowView(object param) { if (param != null &amp;&amp; param == ItemId) //ItemId for View 2.01 { _regionManager.RequestNavigate("ViewSwitchingRegion", new Uri("View 2.01", UriKind.Relative)); } } } public class DataItem : ViewModelBase { public DataItem() { this.Children = new ObservableCollection&lt;DataItem&gt;(); } private string header; public string Header { get {return this.header;} set { if (this.header != value) { this.header = value; OnPropertyChanged("Header"); } } } private DataItem _itemId; public DataItem ItemId { get { return _itemId; } set { if (value != _itemId) { _itemId = value; RaisePropertyChanged("ItemId"); } } } public ObservableCollection&lt;DataItem&gt; Children { get; set; } } } </code></pre>
 

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