ProductInfo.aspx.cs

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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;

public partial class ProductInfo : System.Web.UI.Page
{
    string id;
    protected string productname, picaddress, pinpai, guige, chandi, jiage, jieshao, hits, productclassname;
    protected int shuliang = 0;
    protected void Page_Load(object sender, EventArgs e)
    {
        id=Request.QueryString["id"];
        if (!IsPostBack)
        {
            DataTable dt = DB.getDataTable("select * from Product where ProductId="+id);
            if (dt.Rows.Count > 0)
            {
                DB.ExecuteSql("update product set hits=hits+1 where productid=" + id);

                productname = dt.Rows[0]["ProductName"].ToString();
                picaddress = dt.Rows[0]["picaddress"].ToString().Substring(1);
                pinpai = dt.Rows[0]["pinpai"].ToString();
                guige = dt.Rows[0]["guige"].ToString();
                chandi = dt.Rows[0]["chandi"].ToString();
                productclassname = dt.Rows[0]["productclassname"].ToString();
                jiage = dt.Rows[0]["jiage"].ToString();
                jieshao = dt.Rows[0]["jieshao"].ToString();
                hits = dt.Rows[0]["hits"].ToString();
                shuliang = int.Parse(dt.Rows[0]["shuliang"].ToString());
                
            }
        }
    }

    /// <summary>
    /// 购买
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    protected void btnBuy_Click(object sender, ImageClickEventArgs e)
    {
        HttpCookie cookie;
        if (Request.Cookies["ShoppingCart"] != null)
        {
            cookie = Request.Cookies["ShoppingCart"];
            if (!string.IsNullOrEmpty(Request.Cookies["ShoppingCart"]["ProductId"]) && !string.IsNullOrEmpty(Request.Cookies["ShoppingCart"]["BuyNumber"]))
            {
                string productid = Request.Cookies["ShoppingCart"]["ProductId"];
                string number = Request.Cookies["ShoppingCart"]["BuyNumber"];
                if (("," + productid + ",").IndexOf("," + id + ",") < 0)//购物车中不存在此商品
                {
                    cookie.Values["ProductId"] = productid + "," + id;
                    cookie.Values["BuyNumber"] = number + "," + "1";