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使用cookies实现浏览历史记录功能

2010-10-12 16:22 816 查看
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)
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