使用cookies实现浏览历史记录功能

1. 首先定义存储cookies的对象：

    public class ResortCookiesData
    {
        private string _Img;
        private string _resortName;
        private int _id;

        public ResortCookiesData(string img, string resortname, int id)
        {
            _Img = img;
            _resortName = resortname;
            _id = id;
        }

        public string Img
        {
            get { return _Img; }
        }

        public string ResortName
        {
            get { return _resortName; }
        }

        public int Id
        {
            get { return _id; }
        }
    }

2. 读取cookies存储数据并绑定到数据控件中：

    protected void bindCookies()
    {
        if (Page.Request.Cookies["resortid"] != null)
        {
            HttpCookie _tempCurBuyerList = Page.Request.Cookies["resortid"];
            string[] strArr = _tempCurBuyerList.Value.Split(',');
            ArrayList list = new ArrayList();
            foreach (string s in strArr)
            {
                SendNet.Model.Product m = pm.Product.GetModel(int.Parse(s));
                if (m != null)
                {
                    list.Add(new ResortCookiesData(m.Img, m.ProductName, m.ProductId));
                }
            }
            rpthistory.DataSource = list;
            rpthistory.DataBind();
        }
    }

3. 定义存储cookies的方法：

    protected void History_Resorts(string _cookiesName, int objectID)
    {
        if (Page.Request.Cookies[_cookiesName] != null)
        {
            HttpCookie _tempCurBuyerList = Page.Request.Cookies[_cookiesName];
            string _tempstr = _tempCurBuyerList.Value;
            if (_tempstr.IndexOf(",") > 0)
            {
                string[] sArray = _tempstr.Split(',');
                bool hasthis = false;
                foreach (string i in sArray)
                {
                    if (i == objectID.ToString())
                    {
                        hasthis = true;
                        break;
                    }
                    else
                    {
                        hasthis = false;
                    }
                }


                if (!hasthis)//如果没有ID,则加入
                {
                    if (sArray.Length > 6)//6为存储浏览记录数的数量，实际数量为7
                    {//超过限定，去掉最先入队的元素
                        _tempstr = _tempstr.Substring(0, _tempstr.LastIndexOf(","));
                    }
                    //队列
                    _tempstr = objectID.ToString() + "," + _tempstr;
                }
            }
            else
            {
                //_tempstr += "," + objectID.ToString();
                if (_tempstr != objectID.ToString())
                {
                    _tempstr = objectID.ToString() + "," + _tempstr;
                }
            }
            _tempCurBuyerList.Value = _tempstr;
            _tempCurBuyerList.Expires = DateTime.Now.AddDays(7);
            Page.Response.Cookies.Add(_tempCurBuyerList);
        }
        else
        {
            HttpCookie _addToCookies = new HttpCookie(_cookiesName);
            _addToCookies.Value = objectID.ToString();
            _addToCookies.Expires = DateTime.Now.AddDays(7);
            Page.Response.Cookies.Add(_addToCookies);
        }
    }

4. 在用户浏览某产品时记录到cookies中：

History_Resorts("resortid", m.ProductId);

(此功能到此完成)