Issue with RadScriptManager at page in RadWindow.

[Andrew]

Hello, i show RadWindow from parent form:

<telerik:RadTreeView ID="tvFile" runat="server">
            OnClientContextMenuItemClicking="onClientContextMenuItemClicking">
    <ContextMenus>
        <telerik:RadTreeViewContextMenu ID="MainContextMenu" runat="server">
            <Items>
                 <telerik:RadMenuItem Value="Rights" Text="Rights"/>
           </Items>
       </telerik:RadTreeViewContextMenu>
    </ContextMenus>
    </telerik:RadTreeView>
    <telerik:RadWindowManager ID="winManager" ShowContentDuringLoad="false" VisibleStatusbar="false"
        ReloadOnShow="false" runat="server" Skin="Sunset" EnableShadow="true">
        <Windows>
            <telerik:RadWindow ID="RadWindow2" Modal="true" onClientClose="OnClientClose"
            NavigateUrl="UserRights.aspx" runat="server" Behaviors="Close">
            </telerik:RadWindow>
        </Windows>
    </telerik:RadWindowManager>

<script type="text/javascript">
    function OnClientClose(oWnd, args)
    {
        var arg = args.get_argument();
        if (arg)
         {}
    }
    function openWin(path) {
        var oWnd = radopen("UserRights.aspx?file="+path, "RadWindow2");
    }


    function onClientContextMenuItemClicking(sender, args)
    {
        var menuItem = args.get_menuItem();
        var treeNode = args.get_node();
        var nodeValue = treeNode.get_value();
        menuItem.get_menu().hide();
        switch (menuItem.get_value())
        {
            case "Rights":
                openWin(nodeValue);
                break;
        }
    }
</script>

At UserRights.aspx I need RadScriptManager for RadListBox like this:

<form id="form1" runat="server">
       <telerik:RadScriptManager ID="RadScriptManager1" runat="server"/>
        <asp:Button runat="server" ID="ds" Text="fd" />
        <telerik:RadListBox runat="server" ID="dcs"></telerik:RadListBox>
</form>

But when RadWindow opens at my firebug I got js error:

this._form is null

Type._registerScript("MicrosoftAjaxWeb...UI._UpdateProgress",Sys.UI.Control);

When I haven't got RadScriptManager all is OK. But I need it for RadListBox and UpdatePanel features.

[Georgi Tunev]

Hi Andrew,

I tried to reproduce the problem locally but everything worked as expected, so at this point I cannot tell what might be the reason for this behavior. What happens when:

1. you open the content page directly in the browser?
2. you open the content page in a standard IFRAME?

If the problem does not exist in these 2 cases, try setting ShowContentDuringLoad to true for the RadWindow and check your app again.

Regards,
Georgi Tunev
the Telerik team