Auto incrementing gridview columns and hyperlink to the particular file

<asp:TemplateField HeaderText="S.No"><ItemTemplate><%#Container.DataItemIndex+1%>
</ItemTemplate></asp:TemplateField>

//Hyperlink Field in Gridview to direct to the file in the folder named resumes
<asp:HyperLinkField DataTextField="FileName" DataNavigateUrlFields="FileName" DataNavigateUrlFormatString="/resumes/{0}" HeaderText="Download full profile" />//Incrementing Serial Number in gridview