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POBinding Hierarchical object data to ListBox
 

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  1. POBinding Hierarchical object data to ListBox
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    <p>I'm trying to populate a ListBox with data from an object source using data binding in WPF.</p> <p>The source is an ObjectDataProvider whose data is loaded in from an xml file. I read in the XML file, filling in the appropriate data structure, then set the ObjectInstance for the ObjectDataProvider to the data structure.</p> <p>Here is the data structure:</p> <p>public class Element { public decimal myValue;</p> <pre><code> public decimal df_myValue { get { return myValue; } set { this.myValue = value; } } </code></pre> <p>}</p> <p>public class BasicSet { public Element[] elementSet;</p> <pre><code> public Element[] df_elementSet { get { return elementSet; } set { this.elementSet = value; } } </code></pre> <p>}</p> <p>public class DataSet { public BasicSet[] basicSet;</p> <pre><code>public BasicSet[] df_basicSet { get { return basicSet; } set { this.basicSet = value; } } </code></pre> <p>}</p> <p>Here is the XAML:</p> <pre><code>&lt;UserControl.Resources&gt; &lt;ResourceDictionary&gt; &lt;ObjectDataProvider x:Key="TheData" /&gt; &lt;DataTemplate x:Key="ElementTemplate"&gt; &lt;StackPanel&gt; &lt;TextBox Text="{Binding, Path=df_myValue}" /&gt; &lt;/StackPanel&gt; &lt;/DataTemplate&gt; &lt;HierarchicalDataTemplate x:Key="ElementSetTemplate" ItemsSource="{Binding Path=df_elementSet}" ItemTemplate="{StaticResource ElementTemplate}"&gt; &lt;/HierarchicalDataTemplate&gt; &lt;/ResourceDictionary&gt; &lt;/UserControl.Resources&gt; &lt;Grid&gt; &lt;ListBox ItemsSource="{StaticResource TheData}" ItemTemplate="{StaticResource ElementSetTemplate}"&gt; &lt;/ListBox&gt; &lt;/Grid&gt; </code></pre> <p>Here is the code-behind where the xml data is being loaded:</p> <pre><code> private DataSet m_dataSet; private ObjectDataProvider mODP; public void LoadXml(EditorContext context, XmlValidator.Context validator, XmlDocument doc) { mODP = FindResource("TheData") as ObjectDataProvider; XmlSerializer xs = new XmlSerializer(typeof(DataSet)); XmlReader r = new XmlNodeReader(doc.DocumentElement); m_dataSet = (DataSet)xs.Deserialize(r); mODP.ObjectInstance = m_dataSet; } </code></pre> <p>The desired result is that the ListBox would have a TextBox for each element in the data structure. Note that the data structure is hierarchical for a reason. I cannot flatten the data structure to simplify the problem.</p> <p>I am certain that the xml data is being loaded correctly into the data structure, because I can place a breakpoint and check it and all the data looks fine. But when I run the program, nothing shows up in the ListBox.</p> <p>Any help is appreciated.</p>
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