Nodes are stored as nested collections because the TreeListView displays data in a tree. The collection of root level nodes can be accessed via the TreeListView.Nodes property. Each node has its own collection of child nodes available via the TreeListNode.Nodes property. These child nodes have their own children, etc.
In an unbound mode, you should manually build a TREE by creating nodes (TreeListNode) and adding them to the corresponding node collections.
Note
Nodes can be represented by objects of different types. The only requirement is that these data objects should have common fields (columns).
Example: How to Manually Create a Tree (Unbound Mode)
This example shows how to manually create a tree (unbound mode). It is shown how to create nodes in XAML and code.
using System;
using System.Windows;
using DevExpress.Xpf.Grid;
namespace TreeListView_UnboundMode {
/// <summary>
/// Interaction logic for MainWindow.xaml
/// </summary>
public partial class MainWindow : Window {
public MainWindow() {
InitializeComponent();
BuildTree();
treeListView1.ExpandAllNodes();
}
private void BuildTree() {
TreeListNode rootNode = CreateRootNode(new ProjectObject() { Name = "Project: Stanton", Executor = "Nicholas Llams" });
TreeListNode childNode = CreateChildNode(rootNode, new StageObject() { Name = "Information Gathering", Executor = "Ankie Galva" });
CreateChildNode(childNode, new TaskObject() { Name = "Design", Executor = "Reardon Felton", State = "In progress" });
}
private TreeListNode CreateRootNode(object dataObject) {
TreeListNode rootNode = new TreeListNode(dataObject);
treeListView1.Nodes.Add(rootNode);
return rootNode;
}
private TreeListNode CreateChildNode(TreeListNode parentNode, object dataObject) {
TreeListNode childNode = new TreeListNode(dataObject);
parentNode.Nodes.Add(childNode);
return childNode;
}
}
public class StageObject {
public String Name { get; set; }
public string Executor { get; set; }
}
public class ProjectObject {
public String Name { get; set; }
public string Executor { get; set; }
}
public class TaskObject {
public String Name { get; set; }
public string Executor { get; set; }
public string State { get; set; }
}
}
<Window x:Class="TreeListView_UnboundMode.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="MainWindow" Height="350" Width="525"
xmlns:dxg="http://schemas.devexpress.com/winfx/2008/xaml/grid"
xmlns:local="clr-namespace:TreeListView_UnboundMode">
<Grid>
<dxg:GridControl Name="grid">
<dxg:GridControl.Columns>
<dxg:GridColumn FieldName="Name" />
<dxg:GridColumn FieldName="Executor" />
<dxg:GridColumn FieldName="State" />
</dxg:GridControl.Columns>
<dxg:GridControl.View>
<dxg:TreeListView Name="treeListView1" AutoWidth="True">
<dxg:TreeListView.Nodes>
<dxg:TreeListNode>
<dxg:TreeListNode.Content>
<local:ProjectObject Name="Project: Betaron" Executor="Destiny Tabisola" />
</dxg:TreeListNode.Content>
<dxg:TreeListNode.Nodes>
<dxg:TreeListNode>
<dxg:TreeListNode.Content>
<local:StageObject Name="Development" Executor="Kairra Hogg" />
</dxg:TreeListNode.Content>
<dxg:TreeListNode.Nodes>
<dxg:TreeListNode>
<dxg:TreeListNode.Content>
<local:TaskObject Name="Coding" Executor="Sabato Durley" State="Not Started" />
</dxg:TreeListNode.Content>
</dxg:TreeListNode>
</dxg:TreeListNode.Nodes>
</dxg:TreeListNode>
</dxg:TreeListNode.Nodes>
</dxg:TreeListNode>
</dxg:TreeListView.Nodes>
</dxg:TreeListView>
</dxg:GridControl.View>
</dxg:GridControl>
</Grid>
</Window>
Imports Microsoft.VisualBasic
Imports System
Imports System.Windows
Imports DevExpress.Xpf.Grid
Namespace TreeListView_UnboundMode
''' <summary>
''' Interaction logic for MainWindow.xaml
''' </summary>
Partial Public Class MainWindow
Inherits Window
Public Sub New()
InitializeComponent()
BuildTree()
treeListView1.ExpandAllNodes()
End Sub
Private Sub BuildTree()
Dim rootNode As TreeListNode = CreateRootNode(New ProjectObject() With {.Name = "Project: Stanton", .Executor = "Nicholas Llams"})
Dim childNode As TreeListNode = CreateChildNode(rootNode, New StageObject() With {.Name = "Information Gathering", .Executor = "Ankie Galva"})
CreateChildNode(childNode, New TaskObject() With {.Name = "Design", .Executor = "Reardon Felton", .State = "In progress"})
End Sub
Private Function CreateRootNode(ByVal dataObject As Object) As TreeListNode
Dim rootNode As New TreeListNode(dataObject)
treeListView1.Nodes.Add(rootNode)
Return rootNode
End Function
Private Function CreateChildNode(ByVal parentNode As TreeListNode, ByVal dataObject As Object) As TreeListNode
Dim childNode As New TreeListNode(dataObject)
parentNode.Nodes.Add(childNode)
Return childNode
End Function
End Class
Public Class StageObject
Private privateName As String
Public Property Name() As String
Get
Return privateName
End Get
Set(ByVal value As String)
privateName = value
End Set
End Property
Private privateExecutor As String
Public Property Executor() As String
Get
Return privateExecutor
End Get
Set(ByVal value As String)
privateExecutor = value
End Set
End Property
End Class
Public Class ProjectObject
Private privateName As String
Public Property Name() As String
Get
Return privateName
End Get
Set(ByVal value As String)
privateName = value
End Set
End Property
Private privateExecutor As String
Public Property Executor() As String
Get
Return privateExecutor
End Get
Set(ByVal value As String)
privateExecutor = value
End Set
End Property
End Class
Public Class TaskObject
Private privateName As String
Public Property Name() As String
Get
Return privateName
End Get
Set(ByVal value As String)
privateName = value
End Set
End Property
Private privateExecutor As String
Public Property Executor() As String
Get
Return privateExecutor
End Get
Set(ByVal value As String)
privateExecutor = value
End Set
End Property
Private privateState As String
Public Property State() As String
Get
Return privateState
End Get
Set(ByVal value As String)
privateState = value
End Set
End Property
End Class
End Namespace
See Also