Asp.net 中 Cookie的使用方法

Asp.net 中 Cookie的使用方法  

2008-06-25 15:51:49|  分类：

asp.net |字号 订阅

方法1:

比如建立一个名为cnlive，值为"123"的cookie

HttpCookie cookie = new HttpCookie["cnlive"];

cookie.Value = "123";

Response.AppendCookie(cookie);

取刚才写入的Cookie值:

HttpCookie cookie = Request.Cookies["cnlive"];

cookieValue = cookie.Value;

在一个Cookie中储存多个信息:

HttpCookie cookie = new HttpCookie("cnlive");

cookie.Values.Add("weburl",http://www.cnlive.net);

cookie.Values.Add("author","honfei");

cookie.Values.Add("sitename","网友与媒体");

Response.AppendCookie(cookie);

读取:

HttpCookie cookie = Request.Cookies["cnlive"];

value1 = cookies.Values["weburl"];

value2 = cookies.Values["author"];

.............

方法二:

Response.Cookies["UserID"].Value = "123";//将用户ID写入Cookie

Response.Cookies["UserID"].Expires = DateTime.Now.AddDays(1);

读取方法:

Request.Cookies["UserID"].Value;

写cookie

HttpCookie cookie = new HttpCookie("Info");//定义cookie对象以及名为Info的项

DateTime dt = DateTime.Now;//定义时间对象

TimeSpan ts=new TimeSpan(1,0,0,0);//cookie有效作用时间，具体查msdn

cookie.EXPires = dt.Add(ts);//添加作用时间

cookie.Values.Add("user","cxbkkk");//增加属性

cookie.Values.Add("userid","1203");

Response.AppendCookie(cookie);//确定写入cookie中        读取cookie

if(Request.Cookies["Info"]!=null)

{

     string temp=Convert.ToString(Request.Cookies["Info"].Values["user"])+" "+Convert.ToString(Request.Cookies["Info"].Values["userid"]);

    //读全部就用Request.Cookies["Info"].Value)

     if(temp=="")

     {

         Response.Write("空");

     }

     else

        Response.Write(temp);

}

else

{

    Response.Write("error");

}        修改cookie

Response.Cookies["Info"]["user"] = "2";

Response.Cookies["Info"].Expires = DateTime.Now.AddDays(1);      

// 删除cookie下的属性

HttpCookie acookie=Request.Cookies["Info"];

acookie.Values.Remove("userid");

acookie.Expires = DateTime.Now.AddDays(1);

Response.Cookies.Add(acookie);        删除所有cookie，就是设置过期时间为现在就行了

int limit=Request.Cookies.Count - 1;

for(int i=0;i<limit;i++)

{

   acookie = Request.Cookies(i)

   acookie.Expires = DateTime.Now.AddDays(-1)

   Response.Cookies.Add(acookie)

}

// 读取所有 cookies

HttpCookieCollection cookies;

HttpCookie oneCookie;

cookies = Request.Cookies;

string[] cookieArray = cookies.AllKeys;

for (int i=0; i < cookieArray.Length; i++)

{

oneCookie = cookies[cookieArray[i]];

Response.Write(oneCookie.Name + " - " + oneCookie.Value);

}

// 添加单个cookies

if (Request.Browser.Cookies == true)

{

if (Request.Cookies["LastVisited1"] == null)

{

HttpCookie newCookie = new HttpCookie("LastVisited1",DateTime.Now.ToString());

newCookie.Expires = DateTime.Now.AddYears(1);

Response.Cookies.Add(newCookie);

}

else

{

Response.Write(Request.Cookies["LastVisited1"].Value);

}

}