购物车代码求一个asp.net 购物车代码?

购物车的Java代码

import java.util.ArrayList; import java.util.HashMap; import java.util.Iterator;

public class ShoppingCartManager { HashMap<String, String> hm=new HashMap<String, String>(); float totlePrice=0;

//添加book到购物车 public void addBook(String bookId,String bookQuantity){ if(hm.containsKey(bookId)){ int value=Integer.parseInt(hm.get(bookId)); value+=Integer.parseInt(bookQuantity); hm.put(bookId, value+""); }else{ hm.put(bookId, bookQuantity); } } //修改数量 public void updateQuantity(String bookId,String bookQuantity){ hm.put(bookId, bookQuantity); } //获取购物车的所有信息 并计算总价 public ArrayList<BookBean> getShoppingCart(){ ArrayList<BookBean> al=new ArrayList<BookBean>(); Iterator<String> i=hm.keySet().iterator(); String ids=""; BookTableManager btm=new BookTableManager(); while(i.hasNext()){ ids=ids+","+i.next(); } al= btm.selectByBookIds(ids); totlePrice=0; //清空总价，防止无限累计 for(int j=0;j<al.size();j++){ BookBean bb=al.get(j); totlePrice+=bb.getPrice()*Integer.parseInt(getQuantityById(bb.getBookId()+"")); } return al; } //获取总价 public float getTotlePrice(){ return totlePrice; } //根据ID获取数量 public String getQuantityById(String id){ String quantity=hm.get(id); return quantity; } //清空购物车 public void clear(){ hm.clear(); } //删除购物车中的一本书 public void deleteById(String id){ hm.remove(id); }

}

购物车页面布局原代码

public?class?MyShopCar?extends?HttpServlet?{?public?void?service(HttpServletRequest?request,?HttpServletResponse?response) throws?ServletException,?IOException?{ int?id=Integer.parseInt(request.getParameter("proID")); HttpSession?session=request.getSession(); HashMap?cars=(HashMap)session.getAttribute("cars");?类二：public?class?ShowCarServlet?extends?HttpServlet?{?public?void?service(HttpServletRequest?request,?HttpServletResponse?response) throws?ServletException,?IOException?{ List?list=new?ArrayList(); ProductDao?proDao=new?ProductDao(); HttpSession?session=request.getSession(); HashMap?map=(HashMap)session.getAttribute("cars"); Iterator?ator=map.keySet().iterator(); int?sums=0; while(ator.hasNext()) { Integer?id=(Integer)ator.next(); Integer?count=(Integer)map.get(id); Product?pro=proDao.getAllById(id); pro.setCount(count); sums+=pro.getSum(); list.add(pro); } request.setAttribute("list",?list); request.setAttribute("sums",?sums+""); request.getRequestDispatcher("myShopCar.jsp").forward(request,?response);?}} if(cars==null) { cars=new?HashMap(); } Integer?count?=?(Integer)cars.get(id); if(count==null) { cars.put(id,?1); }else { cars.put(id,?count+1); } session.setAttribute("cars",?cars); response.sendRedirect("ShowCarServlet"); }}

求一个asp.net 购物车代码?

using System; using System.Data; using System.Configuration; using System.Collections; using System.Web; using System.Web.Security; using System.Web.UI; using System.Web.UI.WebControls; using System.Web.UI.WebControls.WebParts; using System.Web.UI.HtmlControls; using System.Collections; public partial class AddCar : System.Web.UI.Page { ess db = new ess(); protected void Page_Load(object sender, EventArgs e) { if (!IsPostBack) { string id = Request.QueryString["id"].ToString();

if (Session["car"] != null) { Hashtable hash = Session["car"] as Hashtable; if (!hash.ContainsKey(id)) { hash.Add(id, 1); } else { hash[id] = int.Parse(hash[id].ToString()) + 1; } Session["car"] = hash; } else { Hashtable hash = new Hashtable(); hash.Add(id, 1); Session["car"] = hash; } Hashtable k = Session["car"] as Hashtable;

DataColumn dc0 = new DataColumn("id", typeof(string)); DataColumn dc1 = new DataColumn("商品名", typeof(string)); DataColumn dc2 = new DataColumn("价格", typeof(float)); DataColumn dc3 = new DataColumn("数量", typeof(int)); DataColumn dc4 = new DataColumn("总价格", typeof(float)); DataTable dt = new DataTable(); dt.Columns.Add(dc0); dt.Columns.Add(dc1); dt.Columns.Add(dc2); dt.Columns.Add(dc3); dt.Columns.Add(dc4); foreach (DictionaryEntry i in k) { //Response.Write(i.Key+" "+i.Value+"<br>"); DataRow dr = dt.NewRow(); DataSet ds = db.QueryDataSet("select * from product where p_id=" + i.Key); dr["id"] = ds.Tables[0].Rows[0]["p_id"].ToString(); dr["商品名"] = ds.Tables[0].Rows[0]["p_name"].ToString(); dr["价格"] = ds.Tables[0].Rows[0]["p_price"].ToString(); dr["数量"] = int.Parse(k[i.Key].ToString()); dr["总价格"] = int.Parse(k[i.Key].ToString()) * double.Parse(ds.Tables[0].Rows[0]["p_price"].ToString()); dt.Rows.Add(dr); } GridView1.DataSource = dt; GridView1.DataBind(); } }

protected void Button1_Click(object sender, EventArgs e) { Response.Redirect("default2.aspx"); } protected void GridView1_RowDeleting(object sender, GridViewDeleteEventArgs e) { string id = GridView1.DataKeys[e.RowIndex].Value.ToString(); Hashtable k = Session["car"] as Hashtable; Session["car"] = k; k.Remove(id); DataColumn dc0 = new DataColumn("id", typeof(string)); DataColumn dc1 = new DataColumn("商品名", typeof(string)); DataColumn dc2 = new DataColumn("价格", typeof(float)); DataColumn dc3 = new DataColumn("数量", typeof(int)); DataColumn dc4 = new DataColumn("总价格", typeof(float)); DataTable dt = new DataTable(); dt.Columns.Add(dc0); dt.Columns.Add(dc1); dt.Columns.Add(dc2); dt.Columns.Add(dc3); dt.Columns.Add(dc4); foreach (DictionaryEntry i in k) { //Response.Write(i.Key+" "+i.Value+"<br>"); DataRow dr = dt.NewRow(); DataSet ds = db.QueryDataSet("select * from product where p_id=" + i.Key); dr["id"] = ds.Tables[0].Rows[0]["p_id"].ToString(); dr["商品名"] = ds.Tables[0].Rows[0]["p_name"].ToString(); dr["价格"] = ds.Tables[0].Rows[0]["p_price"].ToString(); dr["数量"] = int.Parse(k[i.Key].ToString()); dr["总价格"] = int.Parse(k[i.Key].ToString()) * double.Parse(ds.Tables[0].Rows[0]["p_price"].ToString()); dt.Rows.Add(dr); } GridView1.DataSource = dt; GridView1.DataBind();

} protected void Button2_Click(object sender, EventArgs e) { Hashtable k = Session["car"] as Hashtable; string code = DateTime.Now.Ticks.ToString() + new Random().Next(); db.ExecuteNonQuery("insert into OrderList values(+code+)"); foreach(DictionaryEntry i in k) { db.ExecuteNonQuery("insert into DetailsList values(+code+,"+Session["u_id"].ToString()+","+i.Key+","+i.Value+")"); } } } 自己慢慢领悟把