RadComboBox in User Control Error

[Tim DiPaula]

I am hosting a user control in a web part that is using the RadComboBox control.  When I add the control to the user control I get the following message:

Error Message:  "The base class includes the field 'cmd', but its type (Telerik.Web.UI.RadComboBox) is not compatible with the type of control (Telerik.Web.UI.RadComboBox). "

User Control aspx
<%@ Assembly Name="Mcps.OnlineCurriculum.UserControls, Version=1.0.0.0, Culture=neutral, PublicKeyToken=608131910b746488" %>
<%@ Control Language="C#" AutoEventWireup="true" CodeBehind="UnitSelectorControl.ascx.cs"
    Inherits="Mcps.OnlineCurriculum.UserControls.UnitSelectorControl" %>
<%@ Register Assembly="Telerik.Web.UI, Version=2009.2.701.35, Culture=neutral, PublicKeyToken=121fae78165ba3d4"
    Namespace="Telerik.Web.UI" TagPrefix="telerik" %>
    <telerik:RadComboBox ID="cmd" runat="server" />

Any help would be great.

[Zaldy]

Where you able to find a solution to your problem?  Let me know.  Thanks.

[T. Tsonev]

Hi Zaldy,

Please verify that the User Control is referencing exactly the same version of Telerik.Web.UI as you're using in the Web Part. In your case this should be 2009.2.701.35.

You can't have two different versions loaded in the same application. I hope this helps.

Kind regards,
Tsvetomir Tsonev
the Telerik team

[Zaldy]

Hi Tsvetomir,

Our version is different.  We are using version 2009.1.311.35.  I think we are only using one version.  How do I check if I have two different versions loaded in my application? 

Thanks.

-zaldy

[T. Tsonev]

Hi Zaldy,

The easiest way to check is to do a search for Telerik.Web.UI references. In the original sample the Register directive is using a different version:

<%@ Register Assembly="Telerik.Web.UI, Version=2009.2.701.35, Culture=neutral, PublicKeyToken=121fae78165ba3d4" Namespace="Telerik.Web.UI" TagPrefix="telerik" %>

Make sure all references point to the same version.

Best wishes,
Tsvetomir Tsonev
the Telerik team