If you add a HyperLinkField to a Grid View and you set the DataNavigateUrlFields to “Email” (the field coming from the database) and the DataNavigateUrlFormat to “mailto:{0}” it wont work, because asp.net does some extra validation and the output is no link.
The only way to have an email link inside a GridView is by using a TemplateField
Use this code to generate the TemplateField:
<asp:TemplateField HeaderText=“Email”>
<ItemTemplate>
<asp:HyperLink ID=“emailHyperLink” runat=“server” NavigateUrl=‘<%# Eval(“Email”, “mailto:{0}”) %>‘
Text=‘<%# Eval(“Email”) %>‘ Target=“_blank”></asp:HyperLink>
</ItemTemplate>
</asp:TemplateField>
