[Solved] Sys.InvalidExceptionOperation: Type Telerik.Web.UI.RadAjaxControl has already been registered

[hkdave95]

Hi

I am getting the above error when loading an ascx wihin a RadGrid to view one of the grid items.

I have one Telerik.UI Control being a NumericTextBox on the form.

The aspx is as below :

<%@ Control Language="VB" AutoEventWireup="false" CodeFile="rgSearchResults.ascx.vb" Inherits="rgSearchResults" %>
<%@ Register Assembly="Telerik.Web.UI" Namespace="Telerik.Web.UI" TagPrefix="telerik" %>
<table style="background-image: url('../images/light-tile.gif'); width: 100%; height:100%;">
    <tr>
        <td>
            Photos:
        </td>
        <td>
            <div id="divPhotos" runat="server">
            </div>
        </td>
    </tr>
    <tr>
        <td>
            Description:
        </td>
        <td>
            <asp:Label ID="lblDescription" runat="server"></asp:Label>
        </td>
    </tr>
    <tr>
        <td>
            Price
        </td>
        <td>
            <asp:Label ID="lblPrice" runat="server"></asp:Label>
        </td>
    </tr>
    <tr>
        <td>
            Availability
        </td>
        <td>
            <asp:Label ID="lblAvailability" runat="server"></asp:Label>
        </td>
    </tr>
    <tr>
        <td colspan="2" align="center">
            Quantity&nbsp;<telerik:RadNumericTextBox ID="nQuantity" runat="server" MinValue="0" MaxLength="3" NumberFormat-DecimalDigits="0" Width="45px"></telerik:RadNumericTextBox>&nbsp;<asp:Button ID="btnAddToCart" runat="server" Text="Add To Cart" CommandName="btnAddToCart" />
        </td>
    </tr>
    <tr>
        <td colspan="2" align="center">
            <asp:Button ID="btnClose" runat="server" Text="Close" CommandName="btnClose" />
        </td>
    </tr>
</table>

Kind Regards

David

[Vlad]

Hi David,

If the grid is in ajax mode please set EnableAJax to false to resolve this.

Best wishes,
Vlad
the Telerik team

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