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TreeListNode Class

Represents a node displayed within the ASPxTreeList control.

Namespace: DevExpress.Web.ASPxTreeList

Assembly: DevExpress.Web.ASPxTreeList.v23.2.dll

NuGet Package: DevExpress.Web


public class TreeListNode :


The ASPxTreeList is a data visualization control that displays information as a tree. Nodes represent records from the associated data source.

The TreeListNode represents a single node. The TreeListNode.Key property specifies a node’s key value that uniquely identifies the node within the ASPxTreeList. The TreeListNode.ChildNodes property provides access to the collection of child nodes. The TreeListNode.ParentNode property returns the parent node.


The TreeListNode.Selected and TreeListNode.Expanded properties specify whether the node is selected or expanded, respectively.


This example shows how to create a simple tree when the ASPxTreeList functions in unbound mode. New nodes are created and added to the ASPxTreeList via the ASPxTreeList.AppendNode method.

Columns can be created at design time or in code. For detailed information, see Creating Columns and Binding Them to Data Fields.

The image below shows the result:


using DevExpress.Web.ASPxTreeList;

protected void Page_Load(object sender, EventArgs e) {

void CreateTree() {
    TreeListNode parentNode = CreateNodeCore(0, "<b>Local Folders</b>", null);
    CreateNodeCore(1, "Inbox", parentNode);
    CreateNodeCore(2, "Outbox", parentNode);
    CreateNodeCore(3, "Sent Items", parentNode);
    CreateNodeCore(4, "Deleted Items", parentNode);
    TreeListNode searchFolders = CreateNodeCore(5, "<b>Search Folders</b>", null);
    CreateNodeCore(6, "Categorized Mail", searchFolders);
    CreateNodeCore(7, "Large Mail", searchFolders);

TreeListNode CreateNodeCore(int key, string text, TreeListNode parentNode) {
    TreeListNode node = ASPxTreeList1.AppendNode(key, parentNode);
    node["Folder"] = text;
    return node;


See Also