(原创)cookie用法详解

本节将介绍COOKIE的基本用法.

1、COOKIE原理

当客户端首次访问服务器端时

当客户端再次访问服务器端时

2、创建COOKIE

首先引用System.Web命名空间

 

 
   
    
   // 
   创建一个COOKIE对象 
   
 
   HttpCookie myCookie  
   = 
     
   new 
    HttpCookie( 
   " 
   UserInfo 
   " 
   );
 
   // 
   存储COOKIE值 
   
 
   myCookie[ 
   " 
   UserName 
   " 
   ]  
   = 
     
   " 
   UserName 
   " 
   ;
myCookie[ 
   " 
   UserSex 
   " 
   ]  
   = 
     
   " 
   UserSex 
   " 
   ; 
   
   
   //设置与此COOKIE相关的域名 
   
   
   myCookie.Domain="cnblogs.com"; 
   
   
   //设置COOKIE的有效期 
   
   
   myCookie.Expires = DateTime.Now.AddDays(5);
 
   // 
   添加一个COOKIE到当前的web请求 
   
 
   Response.Cookie.Add(myCookie); 
   
 

 

3、读取COOKIE

 
   
  HttpCookie myCookie  
  = 
   Resquest.Cookie[ 
  " 
  UserInfo 
  " 
  ];
 
  string 
   userName;
 
  if 
  (myCookie 
  != 
  null 
  )
{
    userName  
  = 
   myCookie[ 
  " 
  UserName 
  " 
  ];
} 
 

 

4、注销Cookie

 

 
   
  HttpCookie myCookie  
  = 
    
  new 
   HttpCookie( 
  " 
  UserInfo 
  " 
  );
myCookie .Expires  
  = 
   DateTime.Now.AddDays( 
  - 
  1 
  );
Response.Cookies.Add(myCookie ); 
 

 

5、如何查看本地COOKIE

首先设置隐藏文件为可见。

打开C:/Documents and Settings/当前用户/Cookies/ 就可以查看COOKIE文件！