Tree View Control

This control has been updated and is now available for use in Html/Javascript: Html Treeview control.

This free Tree view control developed by vectorlight.net for Microsoft's Silverlight technology is a dynamic and highly customizable control for displaying and navigating tree structures, such as a file system, web site, or any other nested structure both client-side or server-side.

To use the TreeView control you will need to add a reference to Liquid.TreeView.dll in your project.

If you are using Silverlight 4 there is an example demonstrating how to use the TreeView to display a client-side file system treeview.

How to Use the Tree Control In XAML Only

In your XAML ensure you have a reference to the Liquid.TreeView.dll in the UserControl tag at the top.  To use the tree control on your Silverlight page and have it be populated completely in XAML:

<UserControl x:Class="TreeViewXAML.Page"
    xmlns="http://schemas.microsoft.com/client/2007"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:liquidTreeView="clr-namespace:Liquid;assembly=Liquid.TreeView"
    Width="400" Height="300">
    <Grid x:Name="LayoutRoot" Background="White" VerticalAlignment="Top" HorizontalAlignment="Left">
        <liquidTreeView:Tree x:Name="officeTree" Canvas.Top="295" Canvas.Left="200" EnableCheckboxes="true" EnableDragAndDrop="false" Width="300" Height="151" Margin="4">
            <liquidTreeView:Node ID="0" Title="Offices" Icon="images/folder.png" IconExpanded="images/folderOpen.png">
                <liquidTreeView:Node ID="1" Title="Cheshire" Icon="images/folder.png" IconExpanded="images/folderOpen.png">
                    <liquidTreeView:Node ID="10" Title="Chester" Icon="images/doc.png" />
                    <liquidTreeView:Node ID="11" Title="Stockport" Icon="images/doc.png" />
                </liquidTreeView:Node>
                <liquidTreeView:Node ID="2" Title="Dorset" Icon="images/folder.png" IconExpanded="images/folderOpen.png">
                    <liquidTreeView:Node ID="20" Title="Bournemouth" Icon="images/doc.png" />
                    <liquidTreeView:Node ID="21" Title="Poole" Icon="images/doc.png" />
                    <liquidTreeView:Node ID="21" Title="Weymouth" Icon="images/doc.png" />
                </liquidTreeView:Node>
                <liquidTreeView:Node ID="3" Title="Devon" Icon="images/folder.png" IconExpanded="images/folderOpen.png">
                    <liquidTreeView:Node ID="30" Title="Plymouth" Icon="images/doc.png" />
                </liquidTreeView:Node>
                <liquidTreeView:Node ID="4" Title="Hampshire" Icon="images/folder.png" IconExpanded="images/folderOpen.png">
                    <liquidTreeView:Node ID="40" Title="Portsmouth" Icon="images/doc.png" />
                    <liquidTreeView:Node ID="41" Title="Southampton" Icon="images/doc.png" />
                </liquidTreeView:Node>
                <liquidTreeView:Node ID="5" Title="Lancashire" Icon="images/folder.png" IconExpanded="images/folderOpen.png">
                    <liquidTreeView:Node ID="50" Title="Blackburn" Icon="images/doc.png" />
                    <liquidTreeView:Node ID="51" Title="Lancaster" Icon="images/doc.png" />
                </liquidTreeView:Node>
            </liquidTreeView:Node>
        </liquidTreeView:Tree>
    </Grid>
</UserControl>


As you can see from above the tree and all it's child nodes are defined in the XAML which is great for simple, non-dynamic trees but what about displaying a structure from a web-service?  That's where populating using C# comes in.

Populating a Tree Using C#

This method of populating a treeview control using C# is used for more advanced structures, such as those whose nodes cannot be determined at design time.

As before, ensure you have a reference to the Liquid.dll in the UserControl tag at the top, in our XAML we only declare the tree object:

<UserControl x:Class="TreeViewProgrammatic.Page"
    xmlns="http://schemas.microsoft.com/client/2007"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:liquidTreeView="clr-namespace:Liquid;assembly=Liquid.TreeView"
    Width="400" Height="300">
    <Grid x:Name="LayoutRoot" Background="White" VerticalAlignment="Top" HorizontalAlignment="Left">
        <liquidTreeView:Tree x:Name="testTree" Canvas.Top="295" Canvas.Left="200" EnableCheckboxes="true" EnableDragAndDrop="false" Width="200" Height="151" Margin="4" Populate="Tree_Populate" Drop="Tree_Drop" NodeClick="Tree_NodeClick" />
    </Grid>
</UserControl>


In your C# code behind file you can refer to your Tree using testTree.  The Silverlight Tree has several properties for controlling its behaviour, these can be found on the Tree Properties reference page.

using System;
using System.Collections.ObjectModel;
using System.Linq;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Media.Imaging;
using System.Windows.Shapes;

using Liquid;

namespace TreeViewProgrammatic
{
    public partial class Page : UserControl
    {
        private bool _rootBuilding = true;

        public Page()
        {
            InitializeComponent();

            testTree.BuildRoot();
        }

        void testTree_NodeCheckChanged(object sender, TreeEventArgs e)
        {
        }

        private void Tree_NodeClick(object sender, EventArgs e)
        {
            // TODO: Do something here when a node has been selected
        }

        private void Tree_Drop(object sender, TreeEventArgs e)
        {
            e.DropAction = Tree.DropActions.InsertBefore;
        }

        private void Tree_Populate(object sender, TreeEventArgs e)
        {
            ObservableCollection<Node> nodes = (sender is Tree ? ((Tree)sender).Nodes : ((Node)sender).Nodes);

            if (_rootBuilding)
            {
                nodes.Add(new Node("0", "My Documents", true, "images/folder.png", "images/folderOpen.png"));
                _rootBuilding = false;
            }
            else
            {
                switch (e.ID)
                {
                    case "0":
                        nodes.Add(new Node("1", "My Music", true, "images/folder.png", "images/folderOpen.png") { IsEnabled = false });
                        nodes.Add(new Node("2", "My Pictures", true, "images/folder.png", "images/folderOpen.png"));
                        nodes.Add(new Node("3", "My Videos", true, "images/folder.png", "images/folderOpen.png"));
                        nodes.Add(new Node("8", "Connect.xls", false, "images/xls.png"));
                        nodes.Add(new Node("6", "Latest.doc", false, "images/doc.png"));
                        nodes.Add(new Node("7", "Light.doc", false, "images/doc.png"));
                        nodes.Add(new Node("4", "Listing.pdf", false, "images/pdf.png"));
                        nodes.Add(new Node("5", "Update.pdf", false, "images/pdf.png") { IsEnabled = false });
                        break;
                    case "1":
                        nodes.Add(new Node("10", "Downloads", true, "images/folder.png", "images/folderOpen.png"));
                        nodes.Add(new Node("11", "Favourites", true, "images/folder.png", "images/folderOpen.png"));
                        nodes.Add(new Node("12", "Recent", true, "images/folder.png", "images/folderOpen.png"));
                        nodes.Add(new Node("13", "Track 01.mp3", false, "images/mp3.png"));
                        nodes.Add(new Node("14", "Track 02.mp3", false, "images/mp3.png"));
                        nodes.Add(new Node("15", "Track 03.mp3", false, "images/mp3.png"));
                        nodes.Add(new Node("16", "Track 04.mp3", false, "images/mp3.png"));
                        nodes.Add(new Node("17", "Track 05.mp3", false, "images/mp3.png"));
                        nodes.Add(new Node("18", "Track 06.mp3", false, "images/mp3.png"));
                        nodes.Add(new Node("19", "Track 07.mp3", false, "images/mp3.png"));
                        break;
                    case "10":
                        nodes.Add(new Node("16", "Track 04.mp3", false, "images/mp3.png"));
                        nodes.Add(new Node("17", "Track 05.mp3", false, "images/mp3.png"));
                        nodes.Add(new Node("18", "Track 06.mp3", false, "images/mp3.png"));
                        nodes.Add(new Node("19", "Track 07.mp3", false, "images/mp3.png"));
                        break;
                    case "11":
                        nodes.Add(new Node("13", "Track 01.mp3", false, "images/mp3.png"));
                        nodes.Add(new Node("14", "Track 02.mp3", false, "images/mp3.png"));
                        nodes.Add(new Node("15", "Track 03.mp3", false, "images/mp3.png"));
                        nodes.Add(new Node("18", "Track 06.mp3", false, "images/mp3.png"));
                        nodes.Add(new Node("19", "Track 07.mp3", false, "images/mp3.png"));
                        break;
                    case "12":
                        nodes.Add(new Node("14", "Track 02.mp3", false, "images/mp3.png"));
                        nodes.Add(new Node("15", "Track 03.mp3", false, "images/mp3.png"));
                        nodes.Add(new Node("16", "Track 04.mp3", false, "images/mp3.png"));
                        nodes.Add(new Node("18", "Track 06.mp3", false, "images/mp3.png"));
                        nodes.Add(new Node("19", "Track 07.mp3", false, "images/mp3.png"));
                        break;
                    case "2":
                        nodes.Add(new Node("13", "Image 1.gif", false, "images/gif.png"));
                        nodes.Add(new Node("14", "Image 2.gif", false, "images/gif.png"));
                        nodes.Add(new Node("15", "Image 3.gif", false, "images/gif.png"));
                        nodes.Add(new Node("16", "Image 4.gif", false, "images/gif.png"));
                        nodes.Add(new Node("17", "Image 5.gif", false, "images/gif.png"));
                        nodes.Add(new Node("18", "Image 6.gif", false, "images/gif.png"));
                        nodes.Add(new Node("19", "Image 7.gif", false, "images/gif.png"));
                        break;
                    case "3":
                        nodes.Add(new Node("13", "Video 01.mp4", false, "images/mp4.png"));
                        nodes.Add(new Node("14", "Video 02.mp4", false, "images/mp4.png"));
                        nodes.Add(new Node("15", "Video 03.mp4", false, "images/mp4.png"));
                        nodes.Add(new Node("16", "Video 04.mp4", false, "images/mp4.png"));
                        nodes.Add(new Node("17", "Video 05.mp4", false, "images/mp4.png"));
                        nodes.Add(new Node("18", "Video 06.mp4", false, "images/mp4.png"));
                        nodes.Add(new Node("19", "Video 07.mp4", false, "images/mp4.png"));
                        break;
                }
            }
        }
    }
}


Please Note: You will need to ensure the image URL's are valid, the controls download zip contains the images you need here.

Example Silverlight Tree View:

Silverlight Tree Control

Further Information

Post your Comments

 
 
Latest Games
Zombie Escape
Apr 19, 2016
Plays: 2,509

Zombie Escape ScreenshotDrive fast before the crazy mutant zombies get you!

6 Ratings/4.1 Average
Car Parking
Jan 16, 2016
Plays: 2,372

Car Parking ScreenshotGuide the car to its parking space in this fun Car Parking game.

1 Rating/5 Average
Trash It
Jan 11, 2016
Plays: 2,277

Trash It ScreenshotAim for the Trash Can and get the various items of Trash in the bin.

4 Ratings/5 Average
Sky Fly
Jan 11, 2016
Plays: 2,423

Sky Fly ScreenshotFly your plane in this colorful vertical scrolling shoot-em-up. Blast the bad guys and collect any bonus's they leave behind.

1 Rating/5 Average
Professor Snappy
Jan 11, 2016
Plays: 1,963

Professor Snappy ScreenshotPop as many bubbles as possible in this fun and colorful bubble popping game. The levels start off easy enough but gradually get harder!

1 Rating/5 Average
Monster Match Saga
Jan 10, 2016
Plays: 2,286

Monster Match Saga ScreenshotHere we have a bunch of monsters that need to be matched up. Look out for the bomb and spinning monsters that will cause special damage!

3 Ratings/4.6 Average
Fly Bird Fly
Jan 10, 2016
Plays: 2,113

Fly Bird Fly ScreenshotGuide your friendly Bird through the maze of pipes and other obstacles collecting the Stars in this cool arcade game inspired by the legendary Flappy Bird.

1 Rating/5 Average
Life In One
Jan 10, 2016
Plays: 2,286

Life In One ScreenshotYou are stranded on an Alien planet. Your goal is to build a space rocket and escape. Start by building units to create power and mine the metal patches. Build defenses to defend your base from the advancing Aliens and Zombies!

2 Ratings/3 Average
X Pool
Jan 02, 2016
Plays: 2,906

X Pool ScreenshotPlay Pool against the computer or battle against your friends in the online mode!

3 Ratings/3 Average
Fruit Slicer
Jan 02, 2016
Plays: 2,003

Fruit Slicer ScreenshotSlice the fruit that is thrown up onto the screen. Slice the fruit into multiple pieces for maximum points!

1 Rating/5 Average