set_cancel(true); does not cancel  ClientContextMenuShowing event.
Right click on the Node4 still shows default RadTreeView menu that has "Open", "Open in New Tab", etc
Also all the nodes of RadTreeView are created dynamically by loading XML.
Telerik.Web.UI.dll  version is 2010.2.713.35

MyPage.aspx  has

<%@ Page Language="VB" AutoEventWireup="false" CodeFile="MyPage.aspx.vb" MasterPageFile="~/MyBase.master" Inherits="MyNamespace.MyPage" %>
<script type="text/javascript">
function ClientContextMenuShowing(sender, eventArgs) {
        var node = eventArgs.get_node();
       
        if ((node.get_text() == "Node4")) {
            eventArgs.set_cancel(true);    // default context menu still displays
            alert("After set_cancel for " + node.get_text());  // displayed
        }
    }
</script>
<AjaxSettings>
   <telerik:AjaxSetting AjaxControlID="Timer1">
      <UpdatedControls>
         <telerik:AjaxUpdatedControl ControlID="menu1" />
      </UpdatedControls>
   </telerik:AjaxSetting>
<asp:timer id="Timer1" runat="server" interval="300000">
</asp:timer>

MyBase.master  has
<td width="100%" valign="top">
   <div id="Div1" style="display:none;">
      <telerik:RadTreeView ID="menu1" EnableEmbeddedSkins="false" runat="server" Width="220px" ShowLineImages="false"    style="display:inline-block; overflow: hidden">                                                   
      </telerik:RadTreeView>
   </div>
</td>

MyPage.aspx.vb  has
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
   If Not Page.IsPostBack Then
      Timer1Tick(sender, e)
   End If
End Sub

Protected Sub Timer1Tick(ByVal sender As Object, ByVal e As System.EventArgs) Handles Timer1.Tick
      LoadMyMenu()
End Sub

Private Sub LoadMyMenu()
      Dim objMenu As Telerik.Web.UI.RadTreeView = CType(m.GetMasterMenu(), Telerik.Web.UI.RadTreeView)
      Dim objUIService As New UIService(objUserSession)
      Dim objMenuData = objUIService.GetMenus(0)
      Dim XMLMenuItem = objMenuData.Item(0)
      objMenu.LoadXml(XMLMenuItem.XMLMenu.ToString)
      objMenu.Width = "220

   ‘This line works:      objMenu.Nodes.FindNodeByText("Node1").Nodes.FindNodeByText("Node2").Nodes.FindNodeByText("Node3").Nodes.FindNo   deByText("Node4").Text = "Node4”

‘This line does Not cancel default context menu:
objMenu.Nodes.FindNodeByText("Node1").Nodes.FindNodeByText("Node2").Nodes.FindNodeByText("Node3").Nodes.FindNodeByText("Node4"). EnableContextMenu = False
‘This, together with ClientContextMenuShowing() java script function ()se above does Not cancel default context menu also:
objMenu.OnClientContextMenuShowing = "ClientContextMenuShowing"

End Sub

So, how to cancel default context menu in my case for a particular node or set of nodes. Thank you

Menu is dinamically created in code behind:

Dim objMenu As Telerik.Web.UI.RadTreeView = CType(m.GetMasterMenu(), Telerik.Web.UI.RadTreeView)
Dim objUIService As New UIService(objUserSession)
Dim objMenuData = objUIService.GetMenus(0)
Dim XMLMenuItem = objMenuData.Item(0)
objMenu.LoadXml(XMLMenuItem.XMLMenu.ToString)
objMenu.Width = "220"

It creates following nodes on the page:

Node 1
     Node2
          Node3
               Node4

Pointing to Node4, then clicking right mouse button displays menu with the following items :
"Open", "Open in New Tab","Open in New Window", "Save Target As", etc.

How to Not-show that menu on the right mouse button click on Node4 ?

Thank you

Controls: RadEditor, RadTextBox. Version: 2012.3.1120.40

Device, o/s, browser. Ipad ios6 safari
Issue:
Using these controls:
-Enter some text 'hello world', press and hold for magnifying glass, move between words. Typing more text at this point doesn't work, you need to hide the keyboard and press the control again to start typing again.
-Tap a word. wait for pop up to select word then Select word. same issue again.
-Entering text just into the RadEditor appears quite slow in response


RadEditor.
<telerik:RadEditor runat='server' EnableResize="false" ToolsFile="~/ToolsFile.xml"
   OnClientCommandExecuting="RichTextBoxOnClientCommandExecuting" ContentAreaMode="Div"
   ID='radEditor' Width="400px" StripFormattingOptions="AllExceptNewLines" EditModes="All">

Hi!

We are developing an intranet application that uses Windows Authentication with impersonation. Everything works well when everything is on one server and of course in the development environment. (We are using Visual Studio 2012, .NET 4.0, Windows Server 2008 R2, SQL Server 2008 Enterprise.)

We did have some initial issues with this setup until we realized that we need to support delegation for the Network Service account via AD. When we check the user object on a test webpage, everything works fine:

AuthenticationType: Kerberos

ImpersonationLevel: Impersonation

IsAnonymous: False

IsAuthenticated: True

IsGuest: False

IsSystem: False

Name: [user]

Owner: S-1-5-32-544

Token: 2536

User: S-1-5-21-1292428093-1715567821-839522115-9372

Note: we want to use Kerberos in this environment, and this is an HTTPS site. The database server and the web server are two different servers and both are on the same domain.

When we add a Telerik Listview control…

…the database call on the backend:

… is causing the impersonated account to revert back to IIS’s account: Exception of type 'System.Web.HttpUnhandledException' was thrown.. Login failed for user 'NT AUTHORITY\ANONYMOUS LOGON'.

When we bypass the ASP.NET impersonation account and use a domain account, the error changes to: Exception of type 'System.Web.HttpUnhandledException' was thrown.. Login failed for user '[REDACTED]WEB1$'

Thinking we might have an ajax issue, we turned off the RadAjaxManager. No effect.

I will spare you all the database access code because we have tested both impersonation paths in other parts of the application. (We need to support two paths because we do some database work in the application_start in the Global.asax file, so that work is done under one specific domain account and all other session (user) activity is done through the impersonation via asp.net.)

I am not sure this is specifically a Telerik Listview issue, but more of the ‘need datasource’ call.

Before I take the time to build another test project for tech support, I thought I would go to the forum to see if anyone has banged their head against this issue.

Why would the Telerik datasource calls use the IIS account and not honor the web config settings? Do I need to set up something up in IIS for the Telerik modules to use? Or what?

Thanks for your help!

Michael