Issue with RadScriptManager at page in RadWindow.

2 posts, 0 answers
  1. Andrew
    Andrew avatar
    10 posts
    Member since:
    Jul 2010

    Posted 19 Aug 2010 Link to this post

    Hello, i show RadWindow from parent form:

    <telerik:RadTreeView ID="tvFile" runat="server">
            <telerik:RadTreeViewContextMenu ID="MainContextMenu" runat="server">
                     <telerik:RadMenuItem Value="Rights" Text="Rights"/>
        <telerik:RadWindowManager ID="winManager" ShowContentDuringLoad="false" VisibleStatusbar="false"
            ReloadOnShow="false" runat="server" Skin="Sunset" EnableShadow="true">
                <telerik:RadWindow ID="RadWindow2" Modal="true" onClientClose="OnClientClose"
                NavigateUrl="UserRights.aspx" runat="server" Behaviors="Close">
    <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();
            switch (menuItem.get_value())
                case "Rights":

    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>

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

    this._form is null

    When I haven't got RadScriptManager all is OK. But I need it for RadListBox and UpdatePanel features.
  2. Georgi Tunev
    Georgi Tunev avatar
    7207 posts

    Posted 20 Aug 2010 Link to this post

    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.

    Georgi Tunev
    the Telerik team
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