ASP.NET网上购物系统毕业论文(致谢+开题报告+任务书+答辩PPT) 第4页
//显示商品详细信息
    lblProductName.Text = pro.productName;
    lblPrice.Text = pro.productPrice.ToString();
    lblIntro.Text = pro.intro;
    lblClickCount.Text = pro.clickCount.ToString();
   }
   }

商品搜索结果的代码实现：
Product类，方法SearchProducts()：
public static SqlDataReader SearchProducts (string keyword, int pageSize, int pageIndex)
     {  SqlParameter[] para = { new SqlParameter("@KeyWord", keyword),
           new SqlParameter("@pageSize", pageSize),
           new SqlParameter("@pageIndex", pageIndex)
             };
      return SQLHelper.ExecuteReader(SQLHelper.CONN_STRING,
               CommandType.StoredProcedure, "SearchProducts", para);
     }

(Search.aspx.cs)代码如下：
private static  int PageSize  = 10;
  private void Page_Load(object sender, System.EventArgs e)
  { if (!Page.IsPostBack)
   { if (Request.QueryString["keywords"]!="")
    { ShowResult(0, PageSize);
    }
   }
   
  }
  void ShowResult(int pageIndex, int pageSize)
  {  products.DataSource = BLL.Product.SearchProducts(Request.QueryString["keywords"], pageSize,              pageIndex);
   products.DataBind();
   int resultCount = BLL.Product.GetSearchResultCount(Request.QueryString["keywords"]);
   int count;
   if (resultCount%PageSize == 0)
   { count = resultCount/PageSize;
    PageCount.Text = count.ToString();
   }
   else
   { count = resultCount/PageSize+1;
    PageCount.Text = count.ToString();
   }
   page.Items.Clear();
   for(int i=0; i<count; i++)
   { ListItem item = new ListItem((i+1).ToString(), i.ToString());
    page.Items.Add(item);
   }
   page.SelectedIndex = pageIndex;
  }
private void page_SelectedIndexChanged(object sender, System.EventArgs e)
  { ShowResult(page.SelectedIndex, PageSize);
   }

3、购物车功能模块的实现：
这一模块主要包括：添加到购物车和购物车管理，其代码如下：

添加到购物车的代码实现：
ShoppingCart类，方法GetShoppingCartId()：
public String GetShoppingCartId()
  { // 获得HTTP请求的HttpContext实例
   System.Web.HttpContext context = System.Web.HttpContext.Current;
   // 如果用户已通过验证，则返回其用户编号作为CartId
   if (context.User.Identity.Name != "")
   { return context.User.Identity.Name;
   }
   // 如果请求用户为匿名，则创建临时的CartId
   if (context.Request.Cookies["eshop_CartID"] != null)
   { return context.Request.Cookies["eshop_CartID"].Value;
   }
   else
   { // 生成GUID
    Guid tempCartId = Guid.NewGuid();
    // 将GUID保存到Cookie
  context.Response.Cookies["eshop_CartID"].Value = tempCartId.ToString();
    // 返回临时CartId
    return tempCartId.ToString();
   }
  }

ShoppingCart类，方法AddItem()：
public void AddItem(string cartId, int productId, int quantity)
  { SqlParameter[] para = {   new SqlParameter("@cartId", cartId),
           new SqlParameter("@productId", productId),
           new SqlParameter("@quantity", quantity)
          };
     DAL.SQLHelper.ExecuteNonQuery(DAL.SQLHelper.CONN_STRING, CommandType.StoredProcedure,
    "ShoppingCartAddItem", para);
  }

(AddToCart.aspx.cs)代码如下：
private void Page_Load(object sender, System.EventArgs e)
  { if (Request["productId"] != null)
   { BLL.ShoppingCart cart = new eshop.BLL.ShoppingCart();
    //获取CartId
    string cartId = cart.GetShoppingCartId();
    //向购物车添加某种商品，数量为1
    cart.AddItem(cartId, int.Parse(Request["productId"]), 1);
   }
   //跳转到购物车页面
   Response.Redirect("ShoppingCart.aspx");
 }

购物车管理的代码实现：
(ShoppingCart.aspx.cs)代码实现：
private void Page_Load(object sender, System.EventArgs e)
  { if (!Page.IsPostBack)
   { ShowShoppingCartList();
    ShowMenu();
   }
  }
  void ShowMenu()
  { if (Request.IsAuthenticated == true)
   { LogOutArea.Visible = false;
    LogInArea.Visible = true;
   }
   else
   { LogOutArea.Visible = true;
    LogInArea.Visible = false;
   }
  }
  void ShowShoppingCartList()
  { BLL.ShoppingCart cart = new BLL.ShoppingCart();
   // 得到用户的购物车ID
   String cartID = cart.GetShoppingCartId();
   // 如果购物车内没有商品,DataGrid隐藏
   if (cart.GetItemCount(cartID) == 0)
   { DetailsPanel.Visible = false;

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