Load UserControl into node

[Roman]

Hello community

My RadTreeView works with ServerSideCallbacks. In a demo for myself I add a UserControl as a node to the TreeView - which works fine as long as I do not use Telerik components.
However, as soon as I use telerik components in the UserControl I get an error that " " is not a registered client script control.

How I use it:

protected void UrlTreeView_NodeExpand(object sender, RadTreeNodeEventArgs e)
        {
            RadTreeNode onDemandNode = new RadTreeNode();
            SubdomainProperties sp = LoadControl("~/Controls/SubdomainProperties.ascx") as SubdomainProperties;
            onDemandNode.Controls.Add(sp);
            //Configure the node to populate on demand as well
            onDemandNode.ExpandMode = TreeNodeExpandMode.ServerSideCallBack;
            //Add the node as a child of the currently expanded node
            e.Node.Nodes.Add(onDemandNode);

            e.Node.Expanded = true;
        }

Part of the UserControl itself:

<%@ Control Language="C#" AutoEventWireup="true" CodeBehind="SubdomainProperties.ascx.cs"
    Inherits="XSite.XIS.Web.UI.Controls.SubdomainProperties" %>

<%@ Register Assembly="Telerik.Web.UI" Namespace="Telerik.Web.UI" TagPrefix="telerik" %>
<asp:Panel ID="subdomainPropertiesPanel" runat="server" style="padding:10px;">
...
<telerik:RadDateInput runat="server"></telerik:RadDateInput>
...
</asp:Panel>

I'd definitely appreciate any kind of help!

Thanks in advance
Best
Roman

[Yana]

Hi Roman,

You cannot add ajax controls in this way, because when ServerSideCallBack ExpandMode is used, the treeview make an asynchronous request to the server, it's not updated the whole page. I suggest you use ServerSide ExpandMode in this scenario.

All the best,
Yana
the Telerik team

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[Roman]

Hello Yana

Thanks for your answer.
Indeed, now it works. Is there any way this TreeView can be ajaxified considering the latter scenario?
Deriving from your reply I guess not, since every RadControl has to be registered..

Thanks again
Kind regards
Roman

[Roman]

My latter guess was right, however the method found here gets quite close to the actual problem. It's worth having a look.

Thanks for the help
Kind regards
Roman