User/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;
using System.Data.SqlClient;
using LYF.SqlHelper;

public partial class User_productinfo : System.Web.UI.Page
{
    private SqlHelper shp = new SqlHelper("XS");
    private string _photourl;

    public string Photourl
    {
        get { return _photourl; }
        set { _photourl = value; }
    }
    protected void Page_Load(object sender, EventArgs e)
    {
        if (Session["username"] == null || Session["username"].ToString() == "")
        {
            Response.Write("<script>alert('您还未登录，登录后可以购买商品！');history.go(-1);</script>");
        }
        else
        {
            if (!IsPostBack)
            {
                LoadBind();
            }
        }

    }
    private void LoadBind() 
    {
        string id = Request.QueryString["id"].ToString();
        string selsql = "select productname,price,shuliang,photourl from XS_Products where id=" + id + "";
        using (SqlDataReader dr = shp.ExecuteReader(selsql)) 
        {
            if (dr.Read()) 
            {
                this.pname.InnerText = dr["productname"].ToString();
                this.price.InnerText = Double.Parse(dr["price"].ToString()).ToString("0.00");
                this.pcount.InnerText = dr["shuliang"].ToString();
                _photourl = dr["photourl"].ToString();
            }
        }
        shp.CloseDB();
    }
    /// <summary>
    /// 添加到购物车事件
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    protected void shopBT_Click(object sender, EventArgs e)