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[Solved] radscriptmanager error

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answered on 13 Mar 2008, 08:55 AM

Hi Sander,

As a page can contain only one ScriptManager control, you can get a reference to it using ScriptManager.GetCurrent(Page). You can then cast it to RadScriptManager when needed, e.g.:
C#:

RadScriptManager pageScriptManager = (RadScriptManager)ScriptManager.GetCurrent(Page);

VB:

Dim pageScriptManager as RadScriptManager = CType(ScriptManager.GetCurrent(Page), RadScriptManager);

Regarding the error you get - it is typically caused by the control initializer not finding the control element. For example, if your code outputs the script to create a control after an Ajax call, but it does not update the control HTML, the $create function throws this error.

I hope this helps.

Best regards,
Erjan Gavalji
the Telerik team

Instantly find answers to your questions at the new Telerik Support Center

answered on 13 Mar 2008, 10:35 AM

Hi Erjan

I've got a page, page.aspx, which has the radscriptmanager included.
On this page is a radmultipage with some pageviews.
On one of the pageviews I'm using a usercontrol, wucICFVragen.
This usercontrol contains the treeview, and this treeview needs a reference to the scriptmanager.

Hoping you can solve my problem,

Thanks in advance,

Sander van Leeuwen

Here is the code:

-- code snippet page.aspx --

<body>

    <form id="frmScherm0304" runat="server" enableviewstate="true">   

            <telerik:RadScriptManager ID="RadScriptManager1" runat="server">

            </telerik:RadScriptManager>

            <radTS:RadMultiPage ID="radmp" runat="server">

                <radTS:PageView ID="radpv0" runat="server" Width="100%">

                        <asp:UpdatePanel ID="updpnlRight" runat="server">

                            <ContentTemplate>

                            <icf:wucICFVragen ID="wucICFVragenRechts" runat="server" />

                            </ContentTemplate>

                </radTS:PageView>

                <radTS:PageView ID="radpv1" runat="server">

                    <iframe id="radpv1_frame" src="" originalAttribute="src" originalPath="" runat="server" frameborder="0" style="position:absolute;top:40px;height:99.9%"></iframe>

                </radTS:PageView>

            </radTS:RadMultiPage>

    </form>

</body>

-- code snippet usercontrol icf:wucICFVragen --

<asp:Panel ID="wucICFVragen_DragDrop_pnl" CssClass="wucICFVragen_DragDrop_pnl" runat="server">

    <asp:Panel ID="wucICFVragen_DragDrop_pnl_pnlleft" CssClass="wucICFVragen_DragDrop_pnl_pnlleft"

        runat="server" >

        <telerik:RadTreeView ID="wucICFVragen_DragDrop_pnl_treeLeft" style="display:none" runat="server" EnableAjaxSkinRendering="false" Enabled="False" WebServiceSettings-Method="" >

        </telerik:RadTreeView>

    </asp:Panel>

</asp:Panel>

answered on 13 Mar 2008, 12:26 PM

TabStripSiteTest.zip

Hi Sander,

RadTreeView "Prometheus" (actually each control in the "Prometheus" suite) finds the ScriptManager instance using code similar to what I sent you (

ScriptManager.GetCurrent(Page);

). Having that in mind, if your page contains a RadScriptManager, RadTreeView finds the instance. In addition - if the control cannot find the ScriptManager instance, it throws a server-side exception with a message, notifying that it could not find a ScriptManager on the page.

I just played with the code you sent me - I created a small website and added a page and a user control to it. I loaded the page successfully - I did not get the error. Please, find attached the files I used (you should add the RadControls folder and the bin folder with the assemblies in order to run it).

Let me know what I am missing.

Kind regards,
Erjan Gavalji
the Telerik team

Instantly find answers to your questions at the new Telerik Support Center