WPF: Problem with TreeView databinding
- by Am
Hi,
I have a tree view defined as follows:
<TreeView Grid.Row="0" Grid.Column="0" Margin="0"
FlowDirection="LeftToRight"
ItemTemplate="{StaticResource NavigationHeaderTemplate}"
Name="TreeView2">
</TreeView>
The data binding is:
public class ViewTag : INotifyPropertyChanged
{
private string _tagName;
public string TagName
{
get { return _tagName; }
set
{
_tagName = value;
PropertyChanged(this, new PropertyChangedEventArgs("Tag Name"));
}
}
private ObservableCollection<ViewTag> _childTags;
public ObservableCollection<ViewTag> ChildTags
{
get { return _childTags; }
set
{
_childTags = value;
OnPropertyChanged(new PropertyChangedEventArgs("Child Tags"));
}
}
#region INotifyPropertyChanged Members
public event PropertyChangedEventHandler PropertyChanged;
public void OnPropertyChanged(PropertyChangedEventArgs e)
{
if (PropertyChanged != null)
PropertyChanged(this, e);
}
#endregion
public ViewTag(string tagName, ObservableCollection<ViewTag> childTags)
{
_tagName = tagName;
_childTags = childTags;
}
}
And my test binding is:
List<ViewTag> tempTags = new List<ViewTag>();
ViewTag t1, t2, t3, t4, t5, t6;
t1 = new ViewTag("Computers", null);
t2 = new ViewTag("Chemistry", null);
t3 = new ViewTag("Physics", null);
var t123 = new ObservableCollection<ViewTag>();
t123.Add(t1);
t123.Add(t2);
t123.Add(t3);
t4 = new ViewTag("Science", t123);
var t1234 = new ObservableCollection<ViewTag>();
t1234.Add(t4);
t5 = new ViewTag("All Items", t1234);
t6 = new ViewTag("Untagged", null);
var tall = new ObservableCollection<ViewTag>();
tall.Add(t5);
tall.Add(t6);
xy.Add(new ViewNavigationTree() { Header = "Tags", Image = "img/tags2.ico", Children = tall });
var rootFolders = eDataAccessLayer.RepositoryFacrory.Instance.MonitoredDirectoriesRepository.Directories.ToList();
var viewFolders = new ObservableCollection<ViewTag>();
foreach (var vf in rootFolders)
{
viewFolders.Add(new ViewTag(vf.FullPath, null));
}
xy.Add(new ViewNavigationTree() { Header = "Folders", Image = "img/folder_16x16.png", Children = viewFolders });
xy.Add(new ViewNavigationTree() { Header = "Authors", Image = "img/user_16x16.png", Children = null });
xy.Add(new ViewNavigationTree() { Header = "Publishers", Image = "img/powerplant_32.png", Children = null });
TreeView2.ItemsSource = xy;
Problem is, the tree only shows:
+ Tags
All Items
Untagged
+ Folders
dir 1
dir 2
...
Authors
Publishers
The items I added under "All Items" aren't displayed.
Being a WPF nub, i can't put my finger on the problem. Any help will be greatly appriciated.
