Display the Page.User.Identity.Name in the datagrid hyperlink column

Hi,

I am using asp.net, C# and sql server

I have a gridview control which looks like the following

DataNavigateUrlFormatString="http://www.anrdoezrs.net/click-1850716-10387413?sid={0}"/>

In the DataNavigateUrlFormatString="http://www.anrdoezrs.net/click-1850716-10387413?sid={0}

i want to replace the {0} with the logged in user's identity which is Page.User.Identity.Name.

How should i do it should i do it in the DataNavigateUrlFields property or in the code behind pages.

I tried creating a method in the code behind file as follows to get the identity and displaying it

public string GetMemberID()
    {
        return Page.User.Identity.Name.ToString();
    }

and tried calling it in the datagrid hyperlink column as follows

but got an error message as follows :

Databinding expressions are only supported on objects that have a DataBinding event. System.Web.UI.WebControls.HyperLinkField does not have a DataBinding event.

How should i go about it. Please help.

Thanx in advance.