Unable to filter using GridTemplateColumn with DataField present

[Sriram]

Hi,

I am unable to do filtering on the GridTemplateColumn. 

<telerik:GridTemplateColumn HeaderText="<%$ Resources:UI, EmployeeNotesTab_HeaderText_coContact_Contact %>" UniqueName="Contact" DataField="coContact.ExtFormattedFullName">
<ItemStyle HorizontalAlign="Left" VerticalAlign="Top" />
<ItemTemplate>
<asp:Literal ID="lblContact" runat="server" Text='<%# Eval("coContact.ExtFormattedFullName") %>' />
<div>
<small><asp:Label ID="lblFormattedPhone" runat="server" CssClass="darkBlueFont" Text='<%# GetFormattedPhone(Eval("coContact")) %>' /></small></div>
<div><small><asp:Label ID="lblContactType" runat="server" CssClass="darkBlueFont" Text='<%# Eval("coContact.coContactType.typeName") %>' /></small></div>
</ItemTemplate>
</telerik:GridTemplateColumn>

coContact.ExtFormattedFullName is throwing "Object reference not set to an instance of an object" NullReferenceException. 

The <asp:Literal> is displaying the data properly in the column. (Attached is the screenshot).

Please share your thoughts as to how this can be fixed.

Regards,
Sriram

[Radoslav]

Hi Sriram,

Based on the provided information it is hard to say what is causing the demonstrated issue. Could you please post your aspx page markup of the grid with the related code behind file? Also could you please disable the ajax (RadAjaxManager or RadAjaxPanel) and let me know what is the exception which is thrown and what is its message. The other option is to start application in debug mode and to see which line of server side code throws the error.

Looking forward for your reply.

Regards,
Radoslav
Telerik