RadComboBoxContext is null

[Mostafa]

Hi,

I'm implementing the LoadOnDemand with WCF scenario and the WCF method is getting the context for the combo box as a null.
What might cause this error. below is my wcf operation contact implementation:     

[OperationContract]

public RadComboBoxData test(RadComboBoxContext radComboContext)

{
Add your operation implementation here

ViperService.ViperServiceClient viperServiceClient = new ViperService.ViperServiceClient();

return viperServiceClient.GetTraderGroupsLoadOnDemand(radComboContext);

}

the control html code:

 

<telerik:RadComboBox ID="rcmyCombo" runat="server" CheckBoxes="True" EmptyMessage="Choose" Width="300px" DataTextField="Name" DataValueField="Id"

EnableLoadOnDemand="true" ShowMoreResultsBox="true" EnableVirtualScrolling="true" ItemsPerRequest="10" >

<WebServiceSettings Path="TelerikService.svc" Method="test" />

                           

 

</telerik:RadComboBox>

  

any help will be appreciated.

[Mostafa]

I'm working with Telerik.Web.UI.dll version: 2012.2.815.40
and this is the article i'm folowing:

http://www.telerik.com/help/aspnet-ajax/combobox-load-on-demand-wcf-service.html

[Nencho]

Hello Mostafa,

I tried to replicate the described problem, but to no avail. Here is a video, demonstrating the behavior at my end. Please correct me if I had missed something, or doing anything wrong.

Regards,
Nencho
Telerik