This is my Gridview.
<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" DataSourceID="SqlDataSource1"
><Columns>
<asp:BoundField DataField="Id" HeaderText="Id" SortExpression="Id" InsertVisible="False" ReadOnly="True" />
<asp:BoundField DataField="Title" HeaderText="Title" SortExpression="Title" />
<asp:BoundField DataField="Author" HeaderText="Author" SortExpression="Author" />
<asp:BoundField DataField="Type" HeaderText="Type" SortExpression="Type" />
<asp:BoundField DataField="Cost" HeaderText="Cost" SortExpression="Cost" />
<asp:BoundField DataField="Rating" HeaderText="Rating" SortExpression="Rating" />
<%--<asp:BoundField DataField="Link" HeaderText="Link" SortExpression="Link" />--%>
<asp:HyperLinkField DataNavigateUrlFields="Link" DataTextField="Link" HeaderText="Link" Target="_blank" />
</Columns>
</asp:GridView>