Home / Community / Forums / SharePoint 2007 (MOSS) > Integrating Controls > Cannot modify the controls collection of a GenericWebPart

• Gordon

  Posted on May 20, 2009 (permalink)

  Hi,
  
  Working in VS2008, I have a normal working aspx page with telerik:RadAjaxManager, telerik:RadScriptManager and asp:WebPartManager
  
  Everything works fine until I drop a RadAjaxPanel into a WebZone. Then it blows up with
  "Cannot modify the controls collection of a GenericWebPart.  To create a new GenericWebPart, use the WebPartManager.CreateWebPart() method"
  
  Markup is
  <asp:WebPartZone ID="WebPartZone5" runat="server">
                      <ZoneTemplate>
                        <telerik:RadAjaxPanel ID="RadAjaxPanel5" runat="server" ></telerik:RadAjaxPanel>
                      </ZoneTemplate>
                  </asp:WebPartZone>
  
  UpdatePanels can go in Webpart zones, what is wrong with the Telerik Panel
  
  Thanks and regards
  
  Gordon

  Reply

• Telerik Admin

  Posted on May 22, 2009 (permalink)

  Hello Gordon,
  
  Unfortunately you are right. This scenario is not supported by our RadAjaxPanel because it is actually a wrapper around the MS UpdatePanel and injects the real update panel on-the-fly, thus modifying the Controls collection of the GenericWebPart which results in the error you get.
  
  I hope that replacing our ajax panel with MS UpdatePanel in this case (which behaves in the same way) is applicable workaround for you. Please excuse us for not being able to provide more elegant solution for this particular situation.
  
  Kind regards,
  Sebastian
  the Telerik team

  
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  Reply

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