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display an icon in gridview - selectively

Posted By:      Posted Date: August 24, 2010    Points: 0   Category :ASP.Net

I've created an ExpenseReport application which allows users to attach receipts to Expense Report Lineitems. These are contained in a gridview using a template field:

<asp:TemplateField HeaderText="File" InsertVisible="False">
                    <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
                <asp:HyperLink ID="HyperLink" ImageUrl='<%# Eval("filename", "~/workflow/Images/attachment.jpg") %>'
                runat="server" NavigateUrl='<%# Eval("filename", "http://workflowserver/AtWork/workflow/ExpenseReport/retrieveattachment.aspx?attachment={0}") %>' Text="" />  

The trouble I have is that the 'attachment.jpg' icon shows for every lineitem (even one that does not contain an attachment).

I would like to be able to selectively display this icon or show a different icon if there is NO attachment.

Any suggestions would be greatly appreciated. I'm kind of stuck... ;-)

Thank You.

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