Script control ... is not a registered script conrtol

[Edney]

I am getting the following message in a user control I have created:
Script control 'rrLocationRationg' is not a registered script control. Script controls must be registered using RegisterScriptControl() before calling RegisterScriptDescription().
Parameter name: scriptControl

I have the following code working, however if I uncomment the code in RadCBLocations_ItemsRequested I get the above error.  I need to be able to do this as the data pulled back is to large unless there is some type of filtering done.  Any suggestion would be greatley appreciated.

<%@ Control Language="C#" AutoEventWireup="true" CodeBehind="LocationDDL.ascx.cs" Inherits="Phoenix.UserControls.LocationDDL" %>
<%@ Register TagPrefix="telerik" Namespace="Telerik.Web.UI" Assembly="Telerik.Web.UI" %>
<asp:ScriptManagerProxy ID="ScriptManagerProxy1" runat="server">
</asp:ScriptManagerProxy>
    <telerik:RadAjaxPanel ID="rapRefNo" runat="server">
    <telerik:RadComboBox ID="RadCBLocations" Runat="server" EmptyMessage="Choose a Location"
         HighlightTemplatedItems="true" EnableLoadOnDemand="true"  DropDownWidth="755px"
         Height="200px" Width="253px" onitemsrequested="RadCBLocations_ItemsRequested">
         <HeaderTemplate>
            <table style="width: 730px" cellspacing="0" cellpadding="0">
                <tr>
                    <td style="width: 200px;">
                        Name</td>
                    <td style="width: 200px;">
                        Address</td>
                    <td style="width: 150px;">
                        City</td>
                    <td style="width: 30px;">
                        State</td>
                    <td style="width: 150px;">
                        Rating</td>
                </tr>
            </table>
        </HeaderTemplate>
        <ItemTemplate>
            <table style="width: 730px" cellspacing="0" cellpadding="0">
                <tr>
                   <td style="width: 200px;">
                        <%# DataBinder.Eval(Container, "Text")%>
                    </td>
                    <td style="width: 200px;">
                        <%# DataBinder.Eval(Container, "Attributes['Address']")%>
                    </td>
                    <td style="width: 150px;">
                        <%# DataBinder.Eval(Container, "Attributes['City']")%>
                    </td>
                    <td style="width: 30px;">
                        <%# DataBinder.Eval(Container, "Attributes['State']")%>
                    </td>
                    <td style="width: 150px;">
                        <telerik:RadRating ID="rrLocationRating" runat="server" ItemCount="5" OnRate="rrLocationRating_Rate"
                        Value = <%#Convert.ToDouble(DataBinder.Eval(Container, "Attributes['Rating']"))%>
                        SelectionMode="Continuous" Precision = "Item" Orientation="Horizontal" AutoPostBack="true"
                        ClientIDMode="Predictable">
                        </telerik:RadRating>
                    </td>
                </tr>
            </table>
        </ItemTemplate>
     </telerik:RadComboBox>
    </telerik:RadAjaxPanel>

            if (_userId != 0)
            {
                _searchString = "alab";
                if (_searchString.Length > 1)
                {
                    //Fill the Locations list
                    List<Location> currentLocations = PhoenixData.getLocations(_searchString, false, true, false, false, false);
                    //Sort the locations by name
                    currentLocations.Sort(delegate(Location location1, Location location2) { return location2.Name.CompareTo(location1.Name); });
                    //Create the favorites class to retrieve favorite locations
                    FavoritesRetriever myFavorites = new FavoritesRetriever(FavoritesRetriever.favoriteTables.Location, _userId);
                    //get the locations back sorted by rating
                    ratedLocations = myFavorites.RetrieveRatedEntities<Location>(currentLocations);
                    if (!Page.IsPostBack)
                    {
                        string emptyStr = "";
                        //Populate the rated items in the list
                        foreach (Location loc in ratedLocations)
                        {
                            RadComboBoxItem item = new RadComboBoxItem();
                            item.Text = loc.Name;
                            item.Value = loc.Id.ToString();

                            if (loc.Address != null)
                            {
                                item.Attributes.Add("Address", emptyStr + loc.Address.Address1);
                                item.Attributes.Add("City", emptyStr + loc.Address.City);
                                item.Attributes.Add("State", emptyStr + loc.Address.State);
                            }
                            item.Attributes.Add("Rating", loc.Rating.ToString());
                            RadCBLocations.Items.Add(item);

                            item.DataBind();
                        }
                    }
                }
            }
            else
            {
                throw (new MissingFieldException("UserID is required"));
            }
        }

        /// <summary>
        /// Method rrStopRating_Rate created on 1/11/2011
        /// </summary>
        /// <remarks>
        /// Saves the changed rating back to the database
        /// </remarks>

        protected void rrLocationRating_Rate(object sender, EventArgs e)
        {
            //Gets the stop id by parsing the id of the changed rating to get the index, which is then applied to ratedstops to get the stop id
            int objectid = ratedLocations[int.Parse(((RadRating)sender).Parent.ClientID.Substring(((RadRating)sender).Parent.ClientID.LastIndexOf('i') + 1))].Id;

            //Gets the new value of the favorite
            int value = int.Parse(((RadRating)sender).DbValue.ToString());
            PhoenixData.SaveFavorite(2, objectid, _userId, value);

        }


        /// <summary>
        /// </summary>
        /// <value></value>
        /// <remarks>
        /// The unique id of the user you want the list to retrieve the favorites for.
        /// </remarks>
        public int UserId
        {
            set { _userId = value; }
        }

        public string SearchString
        {
            set { _searchString = value; }
        }

        protected void RadCBLocations_ItemsRequested(object sender, RadComboBoxItemsRequestedEventArgs e)
        {
        //    _searchString = e.Text;
        //    if (e.Text.Length > 1)
        //    {
        //        //Fill the Locations list
        //        List<Location> currentLocations = PhoenixData.getLocations(_searchString, false, true, false, false, false);
        //        //Sort the locations by name
        //        currentLocations.Sort(delegate(Location location1, Location location2) { return location2.Name.CompareTo(location1.Name); });
        //        //Create the favorites class to retrieve favorite locations
        //        FavoritesRetriever myFavorites = new FavoritesRetriever(FavoritesRetriever.favoriteTables.Location, _userId);
        //        //get the locations back sorted by rating
        //        ratedLocations = myFavorites.RetrieveRatedEntities<Location>(currentLocations);
        //        //if (!Page.IsPostBack)
        //        //{
        //        string emptyStr = "";
        //        //Populate the rated items in the list
        //        foreach (Location loc in ratedLocations)
        //        {
        //            RadComboBoxItem item = new RadComboBoxItem();
        //            item.Text = loc.Name;
        //            item.Value = loc.Id.ToString();

        //            if (loc.Address != null)
        //            {
        //                item.Attributes.Add("Address", emptyStr + loc.Address.Address1);
        //                item.Attributes.Add("City", emptyStr + loc.Address.City);
        //                item.Attributes.Add("State", emptyStr + loc.Address.State);
        //            }
        //            item.Attributes.Add("Rating", loc.Rating.ToString());
        //            RadCBLocations.Items.Add(item);

        //            item.DataBind();
        //        }
        //    }
        }

     }
}

[Yana]

Hello Edney,

When you load the items of the combobox on demand, you actually send an asynchronous request from the client-side to the server, that's why server controls (as RadRating) cannot be added in the template in such cases. You can add the items in the Page_Load event instead.

Kind regards,
Yana
the Telerik team

[Edney]

Ok, I now have another problem.  For this to work I need the value typed into the RadComboBox by the user but the value of RadCBLocations.Text always returns "";  I can not find a way to access what the user has typed into the combobox.  If I can get this value your solution will work fine for me.

Thanks
Edney

[Yana]

Hi Edney,

I've just answered to the support ticket regarding this question. Can we continue our communication there? Thanks

Greetings,
Yana
the Telerik team