sdk/samples/all in on code/Visual Studio 2010/CSASPNETBreadcrumbWithQueryString/Item.aspx.cs

   1 /****************************** Module Header ******************************\
   2 * Module Name:    Item.aspx.cs
   3 * Project:        CSASPNETBreadcrumbWithQueryString
   4 * Copyright (c) Microsoft Corporation
   5 *
   6 * This page shows a item name. At the same time, this page show the
   7 * category name and the item name in the breadcrumb.
   8 *
   9 * This source is subject to the Microsoft Public License.
  10 * See http://www.microsoft.com/opensource/licenses.mspx#Ms-PL.
  11 * All other rights reserved.
  12 *
  13 \*****************************************************************************/
  14
  15 using System;
  16 using System.Web;
  17
  18 namespace CSASPNETBreadcrumbWithQueryString
  19 {
  20     public partial class Item : System.Web.UI.Page
  21     {
  22         protected void Page_Load(object sender, EventArgs e)
  23         {
  24             if (!IsPostBack && !string.IsNullOrEmpty(Request.QueryString["name"]))
  25             {
  26                 // Show the item name.
  27                 lbMsg.Text = Request.QueryString["name"];
  28
  29                 // Handle SiteMapResolve event to dynamically change current SiteMapNode.
  30                 SiteMap.SiteMapResolve += new SiteMapResolveEventHandler(SiteMap_SiteMapResolve);
  31             }
  32         }
  33
  34         /// <summary>
  35         /// Occurs when the CurrentNode property is accessed.
  36         /// </summary>
  37         /// <param name="sender">
  38         /// The source of the event, an instance of the SiteMapProvider class.
  39         /// </param>
  40         /// <param name="e">
  41         /// A SiteMapResolveEventArgs that contains the event data.
  42         /// </param>
  43         /// <returns>
  44         /// The SiteMapNode that represents the result of the SiteMapResolveEventHandler operation.
  45         /// </returns>
  46         SiteMapNode SiteMap_SiteMapResolve(object sender, SiteMapResolveEventArgs e)
  47         {
  48             // Only need one execution in one request.
  49             SiteMap.SiteMapResolve -= new SiteMapResolveEventHandler(SiteMap_SiteMapResolve);
  50
  51             if (SiteMap.CurrentNode != null)
  52             {
  53                 // SiteMap.CurrentNode is readonly, so we need to clone one to operate.
  54                 SiteMapNode currentNode = SiteMap.CurrentNode.Clone(true);
  55
  56                 currentNode.Title = Request.QueryString["name"];
  57                 currentNode.ParentNode.Title = Database.GetCategoryByItem(Request.QueryString["name"]);
  58                 currentNode.ParentNode.Url = "/Category.aspx?name=" + Database.GetCategoryByItem(Request.QueryString["name"]);
  59
  60                 // Use the changed one in the Breadcrumb.
  61                 return currentNode;
  62             }
  63             return null;
  64         }
  65     }
  66 }