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POUsing HierarchicalDataTemplate and Observable in WPF
 

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  1. POUsing HierarchicalDataTemplate and Observable in WPF
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    <p>I need to use an ObservableCollection and only one class. Here is my code. For some reason I cannot get the TreeView to populate with the Observable Collection . Any help would be appreciated. </p> <p>XAML:</p> <pre><code>&lt;UserControl x:Class="ValidationWPF.ValidationUserControl" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:telerik="http://schemas.telerik.com/2008/xaml/presentation" xmlns:local="clr-namespace:ValidationWPF.DataSources" mc:Ignorable="d" d:DesignHeight="300" d:DesignWidth="300"&gt; &lt;UserControl.Resources&gt; &lt;local:ValidationItem x:Key="ValidationMessages" /&gt; &lt;DataTemplate x:Key="Messages"&gt; &lt;TextBlock Text="{Binding Messages}" /&gt; &lt;/DataTemplate&gt; &lt;HierarchicalDataTemplate x:Key="SubItem" ItemTemplate="{StaticResource Messages}" ItemsSource="{Binding Messages}" &gt; &lt;TextBlock Text="{Binding subItem}" /&gt; &lt;/HierarchicalDataTemplate&gt; &lt;HierarchicalDataTemplate ItemTemplate="{StaticResource SubItem}" x:Key="ItemTemplate" ItemsSource="{Binding subItem}"&gt; &lt;TextBlock Text="{Binding item}" FontWeight="Bold" /&gt; &lt;/HierarchicalDataTemplate&gt; &lt;/UserControl.Resources&gt; &lt;Grid&gt; &lt;telerik:RadTreeView ItemsSource="{Binding Source={StaticResource ValidationMessages}}" ItemTemplate="{StaticResource ItemTemplate}" x:Name="RadTreeView"/&gt; &lt;/Grid&gt; &lt;/UserControl&gt; </code></pre> <p>CLASS:</p> <pre><code>using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Collections.ObjectModel; namespace ValidationWPF.DataSources { class ValidationItem : ObservableCollection&lt;ValidationItem&gt; { public ValidationItem() { } public ValidationItem(Item item, SubItem subItem, string Messages) { this.item = item; this.subItem = subItem; this.Message = Messages; } public string Message { get; set; } public SubItem subItem { get; set; } public Item item { get; set; } public ObservableCollection&lt;ValidationItem&gt; ValidationItems { get { Add(new ValidationItem(Item.Customer, SubItem.Name, "Customer Name Cannot be Null")); Add(new ValidationItem(Item.Customer, SubItem.Phone, "Phone number cannot be Null")); Add(new ValidationItem(Item.Customer, SubItem.Phone, "Phone number must be in the format (###)###-####")); Add(new ValidationItem(Item.Customer, SubItem.Address, "Customer Address cannot be Null")); return ValidationItems; } } } public enum Item { Customer } public enum SubItem { Address, Phone, Name } } </code></pre>
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    1. USGrant Winney
    1. USJLott
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      1. USPhil
 

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Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

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