Cannot convert object of type 'System.String' to type 'System.String[]

[Laurentiu]

In a project with non ajax / ajax controls ( Q3 2008  version ) I want to create a master page for ajax controls.
I get the error below when I set PersistStateInCookie="true" to the  'telerik:RadPanelBar' control .If  I set PersistStateInCookie = "false"   it is working but it doesn't keep my selection.



 <telerik:RadSlidingPane ID="RadSlidingPane1" runat="server" Scrolling="None" 
      Width="180px" Style="margin: 0px; padding: 0px" BorderWidth="0px" OnClientPaneDocked="SlidePaneDocked"
          OnClientPaneUnDocked="SlidePaneUnDocked" Index="0">
                            
      <asp:ContentPlaceHolder ID="contentLeft" runat="server">
      </asp:ContentPlaceHolder>
 
      
      <asp:UpdatePanel ID="upMaster" runat="server" UpdateMode="Conditional">
           <ContentTemplate>
               <asp:UpdateProgress ID="UpdateProgress1" AssociatedUpdatePanelID="upMaster" DynamicLayout="true"
                                        runat="server">
                  <ProgressTemplate>
                         (...loading)
                  </ProgressTemplate>
               </asp:UpdateProgress>
               
                <div style="float: left">   
                    <telerik:RadPanelBar ID="leftPanels" runat="server" Height="100%" ExpandMode="SingleExpandedItem" Width="180px" 
                        PersistStateInCookie="true" />
                </div>
           </ContentTemplate>
      </asp:UpdatePanel>
 
   </telerik:RadSlidingPane>

[InvalidOperationException: Cannot convert object of type 'System.String' to type 'System.String[]']

   System.Web.Script.Serialization.ObjectConverter.ConvertObjectToTypeInternal(Object o, Type type, JavaScriptSerializer serializer) +305914

   System.Web.Script.Serialization.ObjectConverter.ConvertObjectToType(Object o, Type type, JavaScriptSerializer serializer) +192

   System.Web.Script.Serialization.ObjectConverter.AssignToPropertyOrField(Object propertyValue, Object o, String memberName, JavaScriptSerializer serializer) +284

   System.Web.Script.Serialization.ObjectConverter.ConvertDictionaryToObject(IDictionary`2 dictionary, Type type, JavaScriptSerializer serializer) +1349

   System.Web.Script.Serialization.ObjectConverter.ConvertObjectToType(Object o, Type type, JavaScriptSerializer serializer) +192

   System.Web.Script.Serialization.JavaScriptSerializer.Deserialize(String input) +66

   Telerik.Web.UI.RadPanelBar.LoadState(String state) +152

   Telerik.Web.UI.RadPanelBar.LoadStateFromCookie() +257

   Telerik.Web.UI.RadPanelBar.OnPreRender(EventArgs e) +60

   System.Web.UI.Control.PreRenderRecursiveInternal() +108

   System.Web.UI.Control.PreRenderRecursiveInternal() +224

   System.Web.UI.Control.PreRenderRecursiveInternal() +224

   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +3394



Thank you 

Laurentiu

[Laurentiu]

Any suggestion is welcome.

[Kate]

Hello Laurentiu,

Unfortunately we no longer provide support to the Q3 2008 version of the Telerik controls. Please refer to our Support Lifecycle Policy here for more details.

Greetings,
Kate
the Telerik team