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Why TreeView doesn't list my subdirectories? [duplicate]

I am trying to get my head around Heirarchical DataTemplates and TreeViews in WPF and am having some trouble.
I have created an app with only a TreeView on the form as below and defined HierarchicalDataTemplate's for both a Directory object and a File object I then Bind the TreeView to the Directories property (ObservableCollection) of my model.
<Grid>
<Grid.Resources>
<HierarchicalDataTemplate DataType="{x:Type local:Directory}" ItemsSource ="{Binding Directories}">
<TextBlock Text="{Binding Path=Name}"/>
</HierarchicalDataTemplate>
<HierarchicalDataTemplate DataType="{x:Type local:File}" ItemsSource ="{Binding Files}">
<TextBlock Text="{Binding Path=FileName}"/>
</HierarchicalDataTemplate>
</Grid.Resources>
<TreeView Margin="12,12,0,12" Name="treeView1" HorizontalAlignment="Left" Width="204" >
<TreeViewItem ItemsSource="{Binding Directories}" Header="Folder Structure" />
</TreeView>
</Grid>
This works in that in the TreeView I see my directories and it recursively displays all sub directories, but what I want to see is Directories and Files! I've checked the model and it definately has files in some of the sub directories but I can't see them in the tree.
I'm not sure if it is my template that is the problem or my model so I have included them all! :-)
Thanks
OneShot
public partial class MainWindow : Window
{
public MainWindow()
{
InitializeComponent();
}
private MainWindowViewModel _vm;
public MainWindowViewModel VM
{
set
{
_vm = value;
this.DataContext = _vm;
}
}
private void Window_Loaded(object sender, RoutedEventArgs e)
{
var d = new Directory() { Name = "temp" };
recurseDir("c:\\temp", ref d);
VM = new MainWindowViewModel( new List<Directory>() { d } );
}
private void recurseDir(string path, ref Directory dir)
{
var files = System.IO.Directory.GetFiles(path);
var dirs = System.IO.Directory.GetDirectories(path);
dir.Name = path.Substring(path.LastIndexOf("\\")+1);
for (int i = 0; i < files.Length; i++)
{
var fi = new FileInfo(files[i]);
dir.Files.Add(new File() {
FileName = System.IO.Path.GetFileName(files[i]),
DirectoryPath = System.IO.Path.GetDirectoryName(files[i]),
Size = fi.Length,
Extension= System.IO.Path.GetExtension(files[i])
});
}
for (int i = 0; i < dirs.Length; i++)
{
var d = new Directory() { Name = dirs[i].Substring(dirs[i].LastIndexOf("\\")+1) };
recurseDir(dirs[i], ref d);
dir.Directories.Add(d);
}
}
}
-
public class MainWindowViewModel
: DependencyObject
{
public MainWindowViewModel(List<Directory> Dirs)
{
this.Directories = new ObservableCollection<Directory>( Dirs);
}
public ObservableCollection<Directory> Directories
{
get { return (ObservableCollection<Directory>)GetValue(DirectoriesProperty); }
set { SetValue(DirectoriesProperty, value); }
}
public static readonly DependencyProperty DirectoriesProperty =
DependencyProperty.Register("Directories", typeof(ObservableCollection<Directory>), typeof(MainWindowViewModel), new UIPropertyMetadata(null));
public Directory BaseDir
{
get { return (Directory)GetValue(BaseDirProperty); }
set { SetValue(BaseDirProperty, value); }
}
public static readonly DependencyProperty BaseDirProperty =
DependencyProperty.Register("BaseDir", typeof(Directory), typeof(MainWindowViewModel), new UIPropertyMetadata(null));
}
-
public class Directory
{
public Directory()
{
Files = new List<File>();
Directories = new List<Directory>();
}
public List<File> Files { get; private set; }
public List<Directory> Directories { get; private set; }
public string Name { get; set; }
public int FileCount
{
get
{
return Files.Count;
}
}
public int DirectoryCount
{
get
{
return Directories.Count;
}
}
public override string ToString()
{
return Name;
}
}
-
public class File
{
public string DirectoryPath { get; set; }
public string FileName { get; set; }
public string Extension { get; set; }
public double Size { get; set; }
public string FullPath
{
get
{
return System.IO.Path.Combine(DirectoryPath, FileName);
}
}
public override string ToString()
{
return FileName;
}
}

Take a look at this again:
<HierarchicalDataTemplate DataType="{x:Type local:Directory}" ItemsSource ="{Binding Directories}">
<TextBlock Text="{Binding Path=Name}"/>
</HierarchicalDataTemplate>
<HierarchicalDataTemplate DataType="{x:Type local:File}" ItemsSource ="{Binding Files}">
<TextBlock Text="{Binding Path=FileName}"/>
</HierarchicalDataTemplate>
What you're saying is that if you encounter an object of type File, display it with a text block and get its children from a property Files under the File. What you really want is for the Files to show up under each Directory, so you should create a new property that exposes both Directories and Files:
public class Directory
{
//...
public IEnumerable<Object> Members
{
get
{
foreach (var directory in Directories)
yield return directory;
foreach (var file in Files)
yield return file;
}
}
//...
}
and then your template becomes:
<HierarchicalDataTemplate DataType="{x:Type local:Directory}" ItemsSource ="{Binding Members}">
<TextBlock Text="{Binding Path=Name}"/>
</HierarchicalDataTemplate>
<DataTemplate DataType="{x:Type local:File}">
<TextBlock Text="{Binding Path=FileName}"/>
</DataTemplate>
UPDATE:
Actually, the above is not sufficient if you want to receive collection changed notifications for the Members. If that's the case, I recommend creating a new ObservableCollection and adding Directory and File entries to it in parallel to adding to the Files and Directories collections.
Alternately, you may wish to reconsider how you store your information and put everything in a single collection. The other lists are then simply filtered views of the main collection.

use dataBinding to put images into a ListViewItem according to a web Service values

I have a listview in wich each ListViewItem has a list of default images, those images will be replaced by other images if the value recovered from a web service is different from 0
this is the json data:
{
success: 1,
total: 2,
locals: [
{
id_local: "82",
fav: 0,
aime: 0,
aimepas: 0,
},
{
id_local: "83",
fav: 1,
aime: 1,
aimepas: 0,
}
]
}
I tried this code:
ObservableCollection<Item> Locals = new ObservableCollection<Item>();
public async void getListePerSearch()
{
UriS = "URL";
var http = new HttpClient();
http.MaxResponseContentBufferSize = Int32.MaxValue;
var response = await http.GetStringAsync(UriS);
var rootObject1 = JsonConvert.DeserializeObject<NvBarberry.Models.RootObject>(response);
listme.ItemsSource = rootObject1.locals;
foreach (var item in listme.Items.Cast<Locals>())
{
if (item.fav == 1)
{
btnStar.Background = new SolidColorBrush(Colors.Yellow); //yellow
//Debug.Write("fav=1");
}
else
{
btnStar.Background = new SolidColorBrush(Colors.Gray);//Gray
//Debug.Write("fav=0");
}
if (item.aime == 1)
{
coeur.Source = new BitmapImage(new Uri("ms-appx:///images/11.png", UriKind.Absolute));
//Debug.Write("aime=1");
}
else
{
coeur.Source = new BitmapImage(new Uri("ms-appx:///images/1.png", UriKind.Absolute));
//Debug.Write("aime=0");
}
if (item.aimepas == 1)
{
deslikeimage.Source = new BitmapImage(new Uri("ms-appx:///images/22.png", UriKind.Absolute));
//Debug.Write("aimepas=1");
}
else
{
deslikeimage.Source = new BitmapImage(new Uri("ms-appx:///images/2.png", UriKind.Absolute));
//Debug.Write("aimepas=0");
}
}
and this is Locals.cs:
public class Locals
{
public int fav { get; set; }
public int aime { get; set; }
public int aimepas { get; set; }
}
and this is the xaml file:
<ListView x:Name="listme">
<ListView.ItemTemplate >
<DataTemplate >
<Grid>
...
<Button Background="Gray" x:Name="btnStar"/>
<Button>
<Image Source="images/1.png" x:Name="coeur"/>
</Button>
<Button>
<Image Source="images/2.png" x:Name="deslikeimage"/>
</Button>
</Grid>
</DataTemplate >
</ListView.ItemTemplate >
</ListView >
so my question is,how can I use DataBinding in my case
thanks for help

Your class Item must implement INotifyPropertyChanged to notify to the view when some of your properties changed after that you need to set your ObservableCollection Locals as ItemsSource in your List control.
Here is the doc.
https://msdn.microsoft.com/library/windows/apps/windows.ui.xaml.data.inotifypropertychanged.propertychanged.aspx
You need to understand what is Binding How to use it.
http://blogs.msdn.com/b/jerrynixon/archive/2012/10/12/xaml-binding-basics-101.aspx
Here is an example:
public class Employee : INotifyPropertyChanged
{
private string myUrl;
private string myUrl2;
public string MyUrl
{
get { return myUrl; }
set
{
_name = value;
RaisePropertyChanged("MyUrl");
}
}
public string MyUrl2
{
get { return myUrl2; }
set
{
_organization = value;
RaisePropertyChanged("MyUrl2");
}
}
public event PropertyChangedEventHandler PropertyChanged;
protected void RaisePropertyChanged(string name)
{
if (PropertyChanged != null)
{
PropertyChanged(this, new PropertyChangedEventArgs(name));
}
}
}
Now in your foreach:
foreach (var item in MyOriginalCollection)
{
your logic here...
Locals.Add(Item);
}
Finally you need to set your Locals Collection to your ListControl.
ObservableCollection notifies to the view when some object is added or removed.
Here is the documentation
https://msdn.microsoft.com/en-us/library/ms668604(v=vs.110).aspx
In Xaml
you need to personalize your ItemTemplate of your ListControl
<ListView x:Name="myList"
>
<ListView.ItemTemplate>
<DataTemplate>
<Button>
<Image Source="{Binding MyUrl}" x:Name="coeur"/>
</Button>
<Button>
<Image Source="{Binding MyUrl2}" x:Name="coeur"/>
</Button>
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
I hope this information and example would be useful for you.
I know there are many concepts to learn.
Here a final example showing how to use Binding Approach
http://10rem.net/blog/2012/03/27/tip-binding-an-image-elements-source-property-to-a-uri-in-winrt-xaml

How to make binding to WPF TreeView?

I have a TreeView with Binding, but in the TreeView only 1st level items are shown. I need a treeview =) I broke my head what is wrong.
Here is my code:
MainWindow.xaml
<TreeView Margin="2.996,10,214,10" ItemsSource="{Binding Path=Urls}" Grid.Column="1">
<TreeView.ItemTemplate>
<HierarchicalDataTemplate>
<Grid>
<Rectangle Fill="{Binding Path=Color}" HorizontalAlignment="Left" Stroke="Black" VerticalAlignment="Top" Height="20" Width="20"/>
<TextBlock Text="{Binding Path=AbsoluteUrl}" Margin="25,0,0,0" />
</Grid>
<HierarchicalDataTemplate.ItemTemplate>
<DataTemplate>
<TextBlock Text="{Binding Path=AbsoluteUrl}" />
</DataTemplate>
</HierarchicalDataTemplate.ItemTemplate>
</HierarchicalDataTemplate>
</TreeView.ItemTemplate>
</TreeView>
MainViewModel.cs (part)
public ObservableCollection<Url> Urls { get; set; }
public MainWindowViewModel()
{
Urls = new ObservableCollection<Url>();
}
Url.cs
class Url : INotifyPropertyChanged
{
public Url() { }
public Url(string absoluteUrl, bool isBroken, string color)
{
AbsoluteUrl = absoluteUrl;
IsBroken = isBroken;
Color = color;
}
enum Status { Working, Broken };
private ObservableCollection<Url> childUrlsValue = new ObservableCollection<Url>();
public ObservableCollection<Url> ChildUrls
{
get
{
return childUrlsValue;
}
set
{
childUrlsValue = value;
}
}
private string _absoluteUrl;
public string AbsoluteUrl
{
get { return _absoluteUrl; }
set
{
if (_absoluteUrl != value)
{
_absoluteUrl = value;
OnPropertyChanged("AbsoluteUrl");
}
}
}
private bool _isBroken;
public bool IsBroken
{
get { return _isBroken; }
set
{
if (_isBroken != value)
{
_isBroken = value;
OnPropertyChanged("IsBroken");
}
}
}
private string _color;
public string Color
{
get { return _color; }
set
{
if (_color != value)
{
_color = value;
OnPropertyChanged("Color");
}
}
}
public event PropertyChangedEventHandler PropertyChanged;
public void OnPropertyChanged(string propertyName)
{
if (PropertyChanged != null)
{
PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
}
}
}
And just about this i'm adding items to Urls:
Url DataGridTopic = new Url(startUrl.ToString(), true, "red");
DataGridTopic.ChildUrls.Add(
new Url(startUrl.ToString(), true, "red"));
DataGridTopic.ChildUrls.Add(
new Url(startUrl.ToString(), true, "red"));
DataGridTopic.ChildUrls.Add(
new Url(startUrl.ToString(), true, "red"));
Urls.Add(DataGridTopic);

You will have to tell the HierarchicalDataTemplate where to get the child items of a node from by using its ItemsSource property.
In your case:
<HierarchicalDataTemplate
DataType="{x:Type my:Url}"
ItemsSource="{Binding Path=ChildUrls}"
>
...
</HierarchicalDataTemplate>
Note also the usage od the DataType attribute, which often will become a necessity if the levels of the tree are made of different object types (a tree of directories and files would be such an example). However, i am not sure whether this would apply to your scenario or not.

Cannot get Silverlight HierarchicalDataTemplate to display IsolatedStorage folders

This is my first foray into Hierarchical data and am having a bit of a problem.
In Silverlight 4, I am trying to get a list of isolated storage folders to display in a TreeView. Nothing displays at all. My Treeview is completely blank. What am I missing? I am getting data and it is correct.
Any help would be appreciated.
XAML
<sdk:TreeView x:Name="FolderTreeView" Grid.Column="0" Margin="0,0,3,0" ItemsSource="{Binding _Folders}">
<sdk:TreeView.ItemTemplate>
<sdk:HierarchicalDataTemplate ItemsSource="{Binding Path=Folders}">
<TextBlock Margin="0" Text="{Binding Name, Mode=OneWay}"/>
</sdk:HierarchicalDataTemplate>
</sdk:TreeView.ItemTemplate>
</sdk:TreeView>
CS
internal class Folder
{
public Folder() { Folders = new List<Folder>(); }
public string Name { get; set; }
public List<Folder> Folders { get; set; }
}
private List<Folder> _Folders = new List<Folder>();
public OpenFileDialog()
{
InitializeComponent();
ifs = IsolatedStorageFile.GetUserStoreForApplication();
var folder = new Folder
{
Name = "Root",
Folders = (from c in ifs.GetDirectoryNames()
select new Folder
{
Name = c,
Folders = LoadFolders(c)
}).ToList()
};
_Folders.Add(folder);
FolderTreeView.DataContext = new { _Folders };
}
private List<Folder>LoadFolders(string folderName)
{
if(folderName == null)
return null;
return (from c in ifs.GetDirectoryNames(folderName + "\\*.*")
select new Folder
{
Name = c,
Folders = LoadFolders(c)
}).ToList();
}
Thanks

A few things
<sdk:TreeView x:Name="FolderTreeView" Grid.Column="0" Margin="0,0,3,0"
ItemsSource="{Binding _Folders}">
you can't bind to private members.
You need to use ObservableCollections instead of Lists. The binding manager effectively listens for the CollectionChanged events fired by ObservableCollection and notifies the bound controls.
You'll want to implement INotifyPropertyChanged and raise PropertyChanged notifications in your property setters.
Finally, have you set the DataContext for the Treeview?
Also, look in your Output debug window for errors relating to binding.
Edit, ok try:
FolderTreeView.DataContext = this;
and wrap _Folders in a property
public ObservableCollection <Folder> Folders
{
get
{
return _Folders;
}
set
{
_Folders = value;
OnPropertyChanged("Folders");
}
}
change your binding to
<sdk:TreeView x:Name="FolderTreeView" Grid.Column="0" Margin="0,0,3,0"
ItemsSource="{Binding Folders}">
I've changed things quite a bit,
public class Folder : INotifyPropertyChanged
{
public Folder(string folderName)
{
Name = folderName;
Folders = new ObservableCollection<Folder>();
var _ifs = IsolatedStorageFile.GetUserStoreForApplication();
if (folderName != null)
{
Folders = new ObservableCollection<Folder>(
(from c in _ifs.GetDirectoryNames(folderName + "\\*.*")
select new Folder(folderName + "\\" + c)
));
}
else
{
Folders = new ObservableCollection<Folder>(
(from c in _ifs.GetDirectoryNames()
select new Folder(folderName + "\\" + c)
));
}
}
public string Name { get; set; }
private ObservableCollection<Folder> _Folders;
public ObservableCollection<Folder> Folders
{
get { return _Folders; }
set { _Folders = value; OnPropertyChanged("RootFolder"); }
}
#region INotifyPropertyChanged Members
public event PropertyChangedEventHandler PropertyChanged;
protected void OnPropertyChanged(string propertyName)
{
if (PropertyChanged != null)
{
PropertyChanged(this,
new PropertyChangedEventArgs(propertyName));
}
}
#endregion
}
public partial class OpenFileDialog : UserControl
{
public OpenFileDialog()
{
InitializeComponent();
RootFolder = new Folder (null);
RootFolders = new ObservableCollection<Folder>();
RootFolders.Add(RootFolder);
FolderTreeView.DataContext = this;
}
private Folder _RootFolder;
public Folder RootFolder
{
get { return _RootFolder; }
set { _RootFolder = value; }
}
private ObservableCollection<Folder> _RootFolders;
public ObservableCollection<Folder> RootFolders
{
get { return _RootFolders; }
set { _RootFolders = value; }
}
}
xaml
<sdk:TreeView x:Name="FolderTreeView" Margin="0,0,3,0" ItemsSource="{Binding RootFolders}">
<sdk:TreeView.ItemTemplate>
<sdk:HierarchicalDataTemplate ItemsSource="{Binding Path=Folders}">
<StackPanel>
<TextBlock Margin="0" Text="{Binding Name, Mode=OneWay}"/>
</StackPanel>
</sdk:HierarchicalDataTemplate>
</sdk:TreeView.ItemTemplate>
</sdk:TreeView>

Ok...problem solved. Don't understand why though.
I had the ChildWindow set as internal scope instead of public scope because I didn't want the window itself to be viewed external of my Silverlight class library. If anyone can answer why this would stop Hierarchical data binding but not standard data binding I would like to know.

ListView's item insert animations in WinRT

Recently I started building my own big Windows 8 Store App.
Working on UI I started replicating some good UIs.
One I met very interesting animation of inserting new elements in list view in standard Mail app. When you click on chain it expands and shows all messages in chain.
Here is captured video.
I have no idea what technique did they use to achieve this animation and behavior.
Can anyone help me, explain or give example how can I achieve such behavior? Thanks.

The mail app is written in JavaScript, so it won't help you much to know how it was done since this UI stack is quite different than the XAML one. The thing though is that the list controls are likely animated the same way, so you only need to add/remove some items in the list to get the expansion/collapse effect.
I played with it for a bit and this is what I came up with that uses ListView's ItemTemplateSelector property to define a few different item templates.
<Page
x:Class="App82.MainPage"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="using:App82"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
mc:Ignorable="d">
<Page.Resources>
<local:CollapsibleListItemTemplateSelector
x:Key="collapsibleListItemTemplateSelector">
<local:CollapsibleListItemTemplateSelector.BasicItemTemplate>
<DataTemplate>
<Border
Margin="5"
Height="50"
VerticalAlignment="Stretch"
BorderBrush="ForestGreen"
BorderThickness="2,0,0,0">
<StackPanel
Margin="10,0,0,0">
<TextBlock
FontWeight="Bold"
Text="{Binding Title}" />
<TextBlock
Text="{Binding Gist}" />
</StackPanel>
</Border>
</DataTemplate>
</local:CollapsibleListItemTemplateSelector.BasicItemTemplate>
<local:CollapsibleListItemTemplateSelector.ExpandedItemTemplate>
<DataTemplate>
<Border
Margin="15,5,5,5"
Height="50"
VerticalAlignment="Stretch"
BorderBrush="Yellow"
BorderThickness="2,0,0,0">
<StackPanel
Margin="10,0,0,0">
<TextBlock
FontWeight="Bold"
Text="{Binding Title}" />
<TextBlock
Text="{Binding Gist}" />
</StackPanel>
</Border>
</DataTemplate>
</local:CollapsibleListItemTemplateSelector.ExpandedItemTemplate>
<local:CollapsibleListItemTemplateSelector.CollapsibleItemTemplate>
<DataTemplate>
<Border
Margin="5"
Height="50"
VerticalAlignment="Stretch"
BorderBrush="DodgerBlue"
BorderThickness="2,0,0,0">
<StackPanel
Margin="10,0,0,0"
Orientation="Horizontal">
<TextBlock
FontWeight="Bold"
Text="{Binding ChildItems.Count}" />
<TextBlock
FontWeight="Bold"
Text=" Items" />
</StackPanel>
</Border>
</DataTemplate>
</local:CollapsibleListItemTemplateSelector.CollapsibleItemTemplate>
</local:CollapsibleListItemTemplateSelector>
</Page.Resources>
<Grid
Background="{StaticResource ApplicationPageBackgroundThemeBrush}">
<ListView
x:Name="ListView"
ItemTemplateSelector="{StaticResource collapsibleListItemTemplateSelector}"
ItemClick="OnItemClick"
IsItemClickEnabled="True" />
</Grid>
</Page>
Code behind:
using System.Collections;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using App82.Common;
using Windows.UI.Xaml;
using Windows.UI.Xaml.Controls;
namespace App82
{
public sealed partial class MainPage : Page
{
public MainPage()
{
this.InitializeComponent();
var items = new ObservableCollection<BindableBase>();
var item1 = new BasicItem { Title = "Item 1", Gist = "This item has some content that is not fully shown..." };
var item2 = new ExpandedItem { Title = "Item 2", Gist = "This item has some content that is not fully shown..." };
var item3 = new ExpandedItem { Title = "Item 3", Gist = "This item has some content that is not fully shown..." };
var item4 = new ExpandedItem { Title = "Item 4", Gist = "This item has some content that is not fully shown..." };
var item5 = new BasicItem { Title = "Item 5", Gist = "This item has some content that is not fully shown..." };
var itemGroup1 = new CollapsibleItem(items, new[] { item2, item3, item4 });
items.Add(item1);
items.Add(itemGroup1);
items.Add(item5);
this.ListView.ItemsSource = items;
}
private void OnItemClick(object sender, ItemClickEventArgs e)
{
var collapsibleItem = e.ClickedItem as CollapsibleItem;
if (collapsibleItem != null)
collapsibleItem.ToggleCollapse();
}
}
public class CollapsibleListItemTemplateSelector : DataTemplateSelector
{
public DataTemplate BasicItemTemplate { get; set; }
public DataTemplate CollapsibleItemTemplate { get; set; }
public DataTemplate ExpandedItemTemplate { get; set; }
protected override Windows.UI.Xaml.DataTemplate SelectTemplateCore(object item, Windows.UI.Xaml.DependencyObject container)
{
if (item is ExpandedItem)
return ExpandedItemTemplate;
if (item is BasicItem)
return BasicItemTemplate;
//if (item is CollapsibleItem)
return CollapsibleItemTemplate;
}
}
public class BasicItem : BindableBase
{
#region Title
private string _title;
public string Title
{
get { return _title; }
set { this.SetProperty(ref _title, value); }
}
#endregion
#region Gist
private string _gist;
public string Gist
{
get { return _gist; }
set { this.SetProperty(ref _gist, value); }
}
#endregion
}
public class ExpandedItem : BasicItem
{
}
public class CollapsibleItem : BindableBase
{
private readonly IList _hostCollection;
#region IsExpanded
private bool _isExpanded;
public bool IsExpanded
{
get { return _isExpanded; }
set
{
if (this.SetProperty(ref _isExpanded, value))
{
if (_isExpanded)
Expand();
else
Collapse();
}
}
}
#endregion
#region ChildItems
private ObservableCollection<BasicItem> _childItems;
public ObservableCollection<BasicItem> ChildItems
{
get { return _childItems; }
set { this.SetProperty(ref _childItems, value); }
}
#endregion
public CollapsibleItem(
IList hostCollection,
IEnumerable<BasicItem> childItems)
{
_hostCollection = hostCollection;
_childItems = new ObservableCollection<BasicItem>(childItems);
}
public void ToggleCollapse()
{
IsExpanded = !IsExpanded;
}
private void Expand()
{
int i = _hostCollection.IndexOf(this) + 1;
foreach (var childItem in ChildItems)
{
_hostCollection.Insert(i++, childItem);
}
}
private void Collapse()
{
int i = _hostCollection.IndexOf(this) + 1;
for (int index = 0; index < ChildItems.Count; index++)
{
_hostCollection.RemoveAt(i);
}
}
}
}