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POWPF TreeView not loading TreeViewItems until the parent is expanded
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  1. POWPF TreeView not loading TreeViewItems until the parent is expanded
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    copied!<p>I'm experiencing an issue with a Treeview that is driving me crazy!!!</p> <p>My TreeView is databound to an object model that is 3 levels deep, and uses a HierarchicalDataTemplate to define what should be displayed for each level:</p> <p>Company<br> +-Branch<br> --+--Contact</p> <p>I want to make a specific contact the selected node, which I'm doing like this (contact is the object from the databound object model):</p> <pre><code>Dim companyTreeViewItem As TreeViewItem = Me.AgentTreeView.ItemContainerGenerator.ContainerFromItem(contact.Branch.Company) Dim branchTreeViewItem As TreeViewItem = companyTreeViewItem.ItemContainerGenerator.ContainerFromItem(contact.Branch) Dim contactTreeViewItem As TreeViewItem = branchTreeViewItem.ItemContainerGenerator.ContainerFromItem(contact) </code></pre> <p>If I expand the treeview so the node that is going to be selected is visible (and then go and select something else) this code works, however if I run it before I expand any nodes branchTreeViewItem comes back as Nothing (null).</p> <p>Any ideas how I can get to the TreeViewItem for my contact object and set it as selected?</p> <p><strong>EDIT</strong></p> <p>The code that populates the treeview is just setting the DataContext of the control:</p> <pre><code>Me.DataContext = New ObjectModel.ObservableCollection(Of DAL.Company)(From c In entities.Companies.Include("Branches").Include("Branches.Contacts") Order By c.CompanyName) </code></pre> <p>The treeview then has a simple binding</p> <pre><code>&lt;TreeView ItemsSource="{Binding}" VirtualizingStackPanel.IsVirtualizing="False" &gt; </code></pre>
 

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