求一个购物车项目设计源代码

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{ DataAccess db = new DataAccess(); 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%D%A