Sorting a DataView stored in Session state. : Session Variables « Sessions « ASP.NET Tutorial

<%@ Page Language="C#" %>
<%@ Import Namespace="System.Data" %>
<%@ Import Namespace="System.Data.SqlClient" %>
<%@ Import Namespace="System.Web.Configuration" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
    DataView dvProducts;

    void Page_Load()
    {
        dvProducts = (DataView)Session["Products"];
        if (dvProducts == null)
        {
            string conString = WebConfigurationManager.ConnectionStrings["Products"]. ConnectionString;
            SqlDataAdapter dad = new SqlDataAdapter("SELECT Id,Title,Director FROM Products", conString);
            DataTable dtblProducts = new DataTable();
            dad.Fill(dtblProducts);
            dvProducts = new DataView(dtblProducts);
            Session["Products"] = dvProducts;
        }
    }

    protected void grdProducts_Sorting(object sender, GridViewSortEventArgs e)
    {
        dvProducts.Sort = e.SortExpression;
    }

    void Page_PreRender()
    {
        grdProducts.DataSource = dvProducts;
        grdProducts.DataBind();
    }
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server">
    <title>Session DataView</title>
</head>
<body>
     <form id="form1" runat="server">
     <div>

     <asp:GridView
         id="grdProducts"
         AllowSorting="true"
         EnableViewState="false"
         OnSorting="grdProducts_Sorting"
         Runat="server" />
     <br />
     <asp:LinkButton
         id="lnkReload"
         Text="Reload Page"
         Runat="server" />

     </div>
     </form>
</body>
</html>

11.3.Session Variables
	11.3.1.	Using Session State
	11.3.2.	Retrieve the value of an item that you have stored in Session state.
	11.3.3.	Sorting a DataView stored in Session state.
	11.3.4.	Save value in text box to session and read it back (VB.net/C#)
	11.3.5.	Save value to session object and read them back (VB.net)
	11.3.6.	Store user defined object in Session (C#)
	11.3.7.	Setting and retrieving objects from the Session using State Service and a base page (C#)
	11.3.8.	Setting and retrieving objects from the Session using State Service and a base page (VB)
	11.3.9.	A session-aware base page
	11.3.10.	Session counter and application counter (C#)
	11.3.11.	Session counter and application counter (VB)
	11.3.12.	Look for Variables