GridView怎么加超链接？

可以用以下三种的任何一种
<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" Width="227px">
            <Columns>                
                <asp:HyperLinkField HeaderText="a" DataNavigateUrlFields="a" DataNavigateUrlFormatString="Default.aspx?id={0}" />
                <asp:TemplateField HeaderText="b">
                    <ItemTemplate>
                        <asp:HyperLink ID="HyperLink1" runat="server"></asp:HyperLink>
                    </ItemTemplate>
                </asp:TemplateField>
                <asp:TemplateField HeaderText="c">
                    <ItemTemplate>
                        <a href="Default.aspx" runat="server" id="h"></a>
                    </ItemTemplate>
                </asp:TemplateField>
            </Columns>
        </asp:GridView>