asp.netweb简单使用cookie

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---恢复内容开始---

cookie的简单使用

 1 public partial class Login:System.Web.UI.pag
 2 {
 3     public string LoginUserName{get;set;}
 4     protected void Page_Load(object sendet,EventArgs e)
 5     {
 6          if(IsPostBack)
 7          {
 8                string userName=Request.Form["txtName"];
 9                Response.Cookies["userName"].Value=Server.UrlEncode(UserName);
10                Response.Cookies["userName"].Expires=DateTime.Now.AddDays(7);
11          }
12          else
13          {
14               string name=Server.urlDecode(Request.Cookies["userName"].Value);
15               LoginUserName=name;
16               Response.Cookies["userName"].Value=Server.urlEncode(name);
17               Response.Cookies["userName"].Expires=DateTime.Now.AddDays(7);//设置过期时间
18          }
19     }
20 }

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Cookie的限制：

大多数浏览器支持最大为4096字节的Cookie.大多数浏览器只允许每个站点存储20个Cookie,如果视图存储更多Cookie，则最旧的cookie便会被丢弃，有些浏览器还会对它们将接受的来自所有站点的cookie总数作出绝对的限制，通常为300个

Cookie还可以通过HttpCookie

 1 //另外一种创建的cookie
 2 HttpCookie cookie=new HttpCookie("cp4","ssss");
 3 cookie.Expires=DateTime.Now.AddDays(3);
 4 Response.Cookies.Add(cookie);
 5 
 6 //Cookie的多值使用
 7 
 8 Response.Cookies["userInfo"]["userName"]="patrick";
 9 Response.Cookies["userInfo"]["lastVisit"]=DateTime.Now.ToString();
10 Response.Cookies["userInfo"].Expries=DateTime.Now.AddDays(1);

View Code

---恢复内容结束---

cookie的简单使用

 1 public partial class Login:System.Web.UI.pag
 2 {
 3     public string LoginUserName{get;set;}
 4     protected void Page_Load(object sendet,EventArgs e)
 5     {
 6          if(IsPostBack)
 7          {
 8                string userName=Request.Form["txtName"];
 9                Response.Cookies["userName"].Value=Server.UrlEncode(UserName);
10                Response.Cookies["userName"].Expires=DateTime.Now.AddDays(7);
11          }
12          else
13          {
14               string name=Server.urlDecode(Request.Cookies["userName"].Value);
15               LoginUserName=name;
16               Response.Cookies["userName"].Value=Server.urlEncode(name);
17               Response.Cookies["userName"].Expires=DateTime.Now.AddDays(7);//设置过期时间
18          }
19     }
20 }

View Code

Cookie的限制：

Cookie还可以通过HttpCookie

 1 //另外一种创建的cookie
 2 HttpCookie cookie=new HttpCookie("cp4","ssss");
 3 cookie.Expires=DateTime.Now.AddDays(3);
 4 Response.Cookies.Add(cookie);
 5 
 6 //Cookie的多值使用
 7 
 8 Response.Cookies["userInfo"]["userName"]="patrick";
 9 Response.Cookies["userInfo"]["lastVisit"]=DateTime.Now.ToString();
10 Response.Cookies["userInfo"].Expries=DateTime.Now.AddDays(1);

View Code

将Cookie 限制到某个文件夹或应用程序

1 HttpCookie appCookie = new HttpCookie("AppCookie"); 
2 appCookie.Value = "written " + DateTime.Now.ToString(); 
3 appCookie.Expires = DateTime.Now.AddDays(1); 
4 appCookie.Path = "/Application1"; 
5 Response.Cookies.Add(appCookie);