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Using the QueryStringParameter Object

<%@ 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>Show QueryStringParameter Master</title> </head> <body>     <form id="form1" runat="server">     <div>     <asp:GridView         id="grdProducts"         DataSourceId="srcProducts"         AutoGenerateColumns="false"         ShowHeader="false"         Runat="server">         <Columns>         <asp:HyperLinkField             DataTextField="Title"             DataNavigateUrlFields="Id"             DataNavigateUrlFormatString="ShowQueryStringParameterDetails.aspx?id={0}" />         </Columns>     </asp:GridView>     <asp:SqlDataSource         id="srcProducts"         SelectCommand="SELECT * FROM Products"         ConnectionString="<%$ ConnectionStrings:Products %>"         Runat="server" />     </div>     </form> </body> </html> File: ShowQueryStringParameterDetails.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>Show QueryStringParameter Details</title> </head> <body>     <form id="form1" runat="server">     <div>     <asp:DetailsView         id="dtlProduct"         DataSourceID="srcProduct"         Runat="server" />     <asp:SqlDataSource         id="srcProduct"         SelectCommand="SELECT * FROM Products             WHERE Id=@Id"         ConnectionString="<%$ ConnectionStrings:Products %>"         Runat="server">         <SelectParameters>             <asp:QueryStringParameter                 Name="Id"                 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>