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A HyperLinkField is useful when you need to build two page Master/Detail forms.
File: Master.aspx
<%@ Page Language="C#" %>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server">
<title>Master</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:GridView
id="grdProductCategories"
DataSourceID="srcProductCategories"
AutoGenerateColumns="false"
Runat="server">
<Columns>
<asp:HyperLinkField
HeaderText="Product Categories"
DataTextField="Name"
DataNavigateUrlFields="Id"
DataNavigateUrlFormatString="Details.aspx?id={0}" />
</Columns>
</asp:GridView>
<asp:SqlDataSource
id="srcProductCategories"
ConnectionString="<%$ ConnectionStrings:Products %>"
SelectCommand="SELECT Id, Name FROM ProductCategories"
Runat="server" />
</div>
</form>
</body>
</html>
File: Details.aspx
<%@ Page Language="C#" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
"http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server">
<title>Details</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:GridView
id="grdProducts"
DataSourceID="srcProducts"
Runat="server" />
<asp:SqlDataSource
id="srcProducts"
ConnectionString="<%$ ConnectionStrings:Products %>"
SelectCommand="SELECT Title,Director FROM Products
WHERE CategoryId=@CategoryId"
Runat="server">
<SelectParameters>
<asp:QueryStringParameter
Name="CategoryId"
QueryStringField="id" />
</SelectParameters>
</asp:SqlDataSource>
</div>
</form>
</body>
</html>
File: Web.config
<configuration>
<connectionStrings>
<add name="Products"
connectionString="Data Source=.\SQLEXPRESS;
AttachDbFilename=|DataDirectory|MyDatabase.mdf;Integrated Security=True;User Instance=True" />
</connectionStrings>
</configuration>
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