Creating Context Menus at Runtime

The example below shows how to dynamically create Context Menus and apply them to Nodes. The code below creates two Context Menus and applies them to the first and second level Nodes accordingly.

ASPNET

<telerik:RadTreeView RenderMode="Lightweight" ID="RadTreeView1" runat="server" Skin="Vista">
    <Nodes>
        <telerik:RadTreeNode runat="server" Text="Root Item" ContextMenuID="HelpDeskMenu">
            <Nodes>
                <telerik:RadTreeNode runat="server" Text="Child Item 1">
                </telerik:RadTreeNode>
                <telerik:RadTreeNode runat="server" Text="Child Item 2">
                </telerik:RadTreeNode>
            </Nodes>
        </telerik:RadTreeNode>
    </Nodes>
</telerik:RadTreeView>

C#

using System;
using Telerik.Web.UI;
namespace RadTreeView_ContextMenu
{
   public partial class _Default : System.Web.UI.Page
   {
       protected void Page_Load(object sender, EventArgs e)
       {
           if (!IsPostBack)
           {
               RadTreeViewContextMenu contextMenu1 = new RadTreeViewContextMenu();
               contextMenu1.ID = "contextMenu1";
               RadMenuItem menuItem1 = new RadMenuItem();
               menuItem1.Text = "item1";
               contextMenu1.Items.Add(menuItem1);
               RadMenuItem menuItem2 = new RadMenuItem();
               menuItem2.Text = "item2";
               contextMenu1.Items.Add(menuItem2);
               RadTreeView1.ContextMenus.Add(contextMenu1);
               RadTreeViewContextMenu contextMenu2 = new RadTreeViewContextMenu();
               contextMenu2.ID = "contextMenu2";
               RadMenuItem menuItem11 = new RadMenuItem();
               menuItem11.Text = "item11";
               contextMenu2.Items.Add(menuItem11);
               RadMenuItem menuItem21 = new RadMenuItem();
               menuItem21.Text = "item21";
               //You can also add sub-items to the ContextMenuItems
               RadMenuItem subItem21 = new RadMenuItem();
               subItem21.Text = "subItem21";
               menuItem21.Items.Add(subItem21);
               contextMenu2.Items.Add(menuItem21);
               RadTreeView1.ContextMenus.Add(contextMenu2);
               foreach (RadTreeNode node in RadTreeView1.GetAllNodes())
               {
                   node.ContextMenuID = node.Level == 0 ? "contextMenu1" : "contextMenu2";
               }
           }
       }
   }
}      

VB.NET

Imports System
Imports Telerik.Web.UI
namespace RadTreeView_ContextMenu
    Partial Public Class _Default
        Inherits System.Web.UI.Page
        Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs)
            If Not IsPostBack Then
                Dim contextMenu1 As New RadTreeViewContextMenu()
                contextMenu1.ID = "contextMenu1"
                Dim menuItem1 As New RadMenuItem()
                menuItem1.Text = "item1"
                contextMenu1.Items.Add(menuItem1)
                Dim menuItem2 As New RadMenuItem()
                menuItem2.Text = "item2"
                contextMenu1.Items.Add(menuItem2)
                RadTreeView1.ContextMenus.Add(contextMenu1)
                Dim contextMenu2 As New RadTreeViewContextMenu()
                contextMenu2.ID = "contextMenu2"
                Dim menuItem11 As New RadMenuItem()
                menuItem11.Text = "item11"
                contextMenu2.Items.Add(menuItem11)
                Dim menuItem21 As New RadMenuItem()
                menuItem21.Text = "item21"
                'You can also add sub-items to the ContextMenuItems
                Dim subItem21 As New RadMenuItem()
                subItem21.Text = "subItem21"
                menuItem21.Items.Add(subItem21)
                contextMenu2.Items.Add(menuItem21)
                RadTreeView1.ContextMenus.Add(contextMenu2)
                For Each node As RadTreeNode In RadTreeView1.GetAllNodes()
                    node.ContextMenuID = IIf(node.Level = 0, "contextMenu1", "contextMenu2")
                Next
            End If
        End Sub
    End Class
End Namespace