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POHow to select WPF TreeViewItem which has been populated using XmlDataProvider?
 

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  1. POHow to select WPF TreeViewItem which has been populated using XmlDataProvider?
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    <p>I have a WPF <code>TreeView</code> which has been populated from an XML file at runtime. I click on a button and a <code>FileDialog</code> box appears and then I select an XML file. Then the XML file is loaded in the <code>TreeView</code>. I have used a <code>XmlDataProvider</code> and some <code>HierarchicalDataTemplate</code>s to load the XML.</p> <p>I have added an action handler with the TreeView, but when I select an item of that TreeView I can't find any reference of that item. I only find the reference of the first element. </p> <p>How can I solve this issue?</p> <p>The XAML is:</p> <pre><code>&lt;Window x:Class="Demo2.MainWindow" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Title="MainWindow" Height="600" Width="800"&gt; &lt;Window.Resources&gt; &lt;XmlDataProvider x:Key="MEIInformation" XPath="/MEI" /&gt; &lt;HierarchicalDataTemplate DataType="Case" ItemsSource="{Binding}"&gt; &lt;TextBlock Text="{Binding XPath=@Name}"&gt;&lt;/TextBlock&gt; &lt;/HierarchicalDataTemplate&gt; &lt;HierarchicalDataTemplate DataType="Phase" ItemsSource="{Binding}"&gt; &lt;TextBlock Text="{Binding XPath=@Name}"&gt;&lt;/TextBlock&gt; &lt;/HierarchicalDataTemplate&gt; &lt;HierarchicalDataTemplate DataType="Trigger" ItemsSource="{Binding}"&gt; &lt;TextBlock Text="{Binding XPath=@Name}"&gt;&lt;/TextBlock&gt; &lt;/HierarchicalDataTemplate&gt; &lt;/Window.Resources&gt; &lt;Grid&gt; &lt;ToolBarTray&gt; &lt;ToolBar&gt; &lt;Button ToolTip="Open Test Suite" Click="OpenTestSuite"&gt; &lt;Image Source="Icons/open.png"&gt;&lt;/Image&gt; &lt;/Button&gt; &lt;/ToolBar&gt; &lt;/ToolBarTray&gt; &lt;TreeView x:Name="trv" FontSize="14" Height="518" HorizontalAlignment="Left" Margin="6,31,0,0" VerticalAlignment="Top" Width="431"&gt; &lt;TreeViewItem ItemsSource="{Binding Source={StaticResource MEIInformation}, XPath=*}" Header="Suites"&gt;&lt;/TreeViewItem&gt; &lt;/TreeView&gt; &lt;/Grid&gt; &lt;/Window&gt; </code></pre> <p>And the code snippest is:</p> <pre><code>public partial class MainWindow : Window { public MainWindow() { InitializeComponent(); this.trv.MouseRightButtonUp+=new MouseButtonEventHandler(DoSomething); } private void OpenTestSuite(object sender, RoutedEventArgs e) { XmlDocument xmlDocument = new XmlDocument(); OpenFileDialog open = new OpenFileDialog(); open.Filter = "XML Files (*.xml)|*.xml"; if (open.ShowDialog() == true) { xmlDocument.Load(open.FileName); XmlDataProvider dataProvider = this.FindResource("MEIInformation") as XmlDataProvider; dataProvider.Document = xmlDocument; } } private void DoSomething(object sender, MouseEventArgs e) { MessageBox.Show("Do Something in TreeView!"); TreeViewItem childItem = e.Source as TreeViewItem; if (childItem != null) { MessageBox.Show(childItem.Header.ToString()); // or MessageBox.Show(childItem.toString); childItem.IsSelected = true; } else MessageBox.Show("No Selected Item!"); } } </code></pre> <p>XML</p> <pre><code>&lt;?xml version="1.0" encoding="ISO-8859-1"?&gt; &lt;MEI&gt; &lt;Case Name="Jean Price"&gt; &lt;Phase Name="January"&gt; &lt;Trigger Name="Order # JAN001"&gt;&lt;/Trigger&gt; &lt;Trigger Name="Order # JAN002"&gt;&lt;/Trigger&gt; &lt;/Phase&gt; &lt;Phase Name="February"&gt; &lt;Trigger Name="Order # FEB001"&gt;&lt;/Trigger&gt; &lt;/Phase&gt; &lt;/Case&gt; &lt;Case Name="John P Grant"&gt; &lt;Phase Name="April"&gt; &lt;Trigger Name="Order # APR001"&gt;&lt;/Trigger&gt; &lt;!-- ... --&gt; &lt;/MEI&gt; </code></pre> <p>I just want to have a reference of that item so that i can add new item after that item.</p> <hr> <p>@Mart I have changed the treeview on the xaml like this... (added SelectedItemChanged="DoSomething")...</p> <pre><code>&lt;TreeView SelectedItemChanged="DoSomething"....../&gt; </code></pre> <p>And the c# code is now....... </p> <pre><code>private void DoSomething(object sender, EventArgs e) { MessageBox.Show("Do Something in TreeView!"); TreeViewItem childItem = sender as TreeViewItem; if (childItem != null) { MessageBox.Show(childItem.Header.ToString()); childItem.IsSelected = true; MessageBox.Show("It Works!"); } else MessageBox.Show("No Selected Item!"); } </code></pre> <p>but there is no luck at all. And i have not understood ur UIElement sugestion...:(</p>
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    1. USAhmed Chisty
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      1. POHow to select WPF TreeViewItem which has been populated using XmlDataProvider?
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    1. COCan you please paste your code snippet here so that we can find out what exactly went wrong
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      1. POHow to select WPF TreeViewItem which has been populated using XmlDataProvider?
      1. USSouvik Basu
    2. COthe xml is: The xml file is: <?xml version="1.0" encoding="ISO-8859-1"?> <MEI> <Case Name="Jean Price"> <Phase Name="January"> <Trigger Name="Order # JAN001"> </Trigger> <Trigger Name="Order # JAN002"> </Trigger> </Phase> <Phase Name="February"> <Trigger Name="Order # FEB001"> </Trigger> </Phase> </Case> <Case Name="John P Grant"> <Phase Name="April"> <Trigger Name="Order # APR001"> </Trigger> <Trigger Name="Order # APR002"> </Trigger> </Phase> <Phase Name="May"> <Trigger Name="Order # MAY001"> </Trigger> </Phase> </Case> </MEI>
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      1. POHow to select WPF TreeViewItem which has been populated using XmlDataProvider?
      1. USAhmed Chisty
 

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