Hi Guys,

 I have this working with a hyperlink field in a gridview.

            <asp:HyperLinkField DataNavigateUrlFields="UserID" DataNavigateUrlFormatString="userprofiles.aspx?UserID={0}"
                DataTextField="UserName" HeaderText="User Name" Text="User Name" >

I just want to same thing in a datagrid but I get this error:

<asp:HyperLink ID="HyperLinkToUserProfile" runat="server" NavigateUrl="userprofiles.aspx?UserID={0}"><%# Eval("UserName")%></asp:HyperLink>

Cannot convert value of parameter 'UserID' from 'System.String' to 'System.Guid'
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.InvalidOperationException: Cannot convert value of parameter 'UserID' from 'System.String' to 'System.Guid'

Does anyone know how to fix this?

many thanks

polynaux 

How about this? 

<asp:hyperlink id="HyperLinkToUserProfile" runat="server" navigateurl='<%# Eval("UserID", "userprofiles.aspx?UserID={0}") %>'
	text='<%# Eval("UserName") %>' />

 Many thanks ecbruck

that worked !