Question

I have a List bound to a TreeView like:

XAML:

<TreeView Name="browserTree" 
          BorderBrush="DarkSlateGray"
          BorderThickness="1"
          Grid.Row="2"
          Margin="0,3,0,0"
          ItemsSource="{Binding UpdateSourceTrigger=PropertyChanged}">
    <TreeView.ItemTemplate>
        <DataTemplate>
            <TextBlock Text="{Binding}"/>
        </DataTemplate>
    </TreeView.ItemTemplate>
</TreeView>

C#:

browserTree.DataContext = treeList;

I update the list via:

void QueryChange(string s)
{
    rCM.SetCommand(s);
    treeList.Clear();
    SqlDataReader sr = rCM.ExecuteReader(System.Data.CommandBehavior.Default);
    while (sr.Read())
    {
        treeList.Add((string)sr["tree_hdr"]);
    }
    sr.Close();
}

The List<string> is just a placeholder at the moment for a more meaningful data class I have yet to implement. But right now I need to know why the TreeView is not updating to reflect the changes made to the list.

Answer 1

Try making the treelist an ObservableCollection.