class="FocusMe">一、添加cookie
C# 代码 复制
 
 //方式1:
//方式1:
 Response.Cookies["username"].value="gggg";
Response.Cookies["username"].value="gggg";
 Response.Cookies["username"].Expires=DateTime.MaxValue;
Response.Cookies["username"].Expires=DateTime.MaxValue; 
 
 //方式2:
//方式2:
 HttpCookie acookie = new HttpCookie("last");
HttpCookie acookie = new HttpCookie("last");
 acookie.Value="a";
acookie.Value="a";
 acookie..Expires=DateTime.MaxValue;
acookie..Expires=DateTime.MaxValue; 
 Response.Cookies.Add(acookie);
Response.Cookies.Add(acookie);
 
 //多值Cookie的写法
//多值Cookie的写法 
 
 //方式1:
//方式1:
 Response.Cookies["userinfo1"]["name"].value="aaa";
Response.Cookies["userinfo1"]["name"].value="aaa";
 Response.Cookies["userinfo1"]["last"].value="a";
Response.Cookies["userinfo1"]["last"].value="a";
 Response.Cookies["userinfo1"].Expires=DateTime.MaxValue;
Response.Cookies["userinfo1"].Expires=DateTime.MaxValue; 
 
 //方式2:
//方式2:
 HttpCookie cookie = new HttpCookie("userinfo1");
HttpCookie cookie = new HttpCookie("userinfo1");
 cookie.Values["name"]="aaa";
cookie.Values["name"]="aaa";
 cookie.Values["last"]="a";
cookie.Values["last"]="a";
 cookie.Expires=DateTime.MaxValue;
cookie.Expires=DateTime.MaxValue; 
 //cookie.Expires = System.DateTime.Now.AddDays(1);//设置过期时间  1天
//cookie.Expires = System.DateTime.Now.AddDays(1);//设置过期时间  1天
 Response.Cookies.Add(cookie);
Response.Cookies.Add(cookie);

二、读取Cookie
Internet Explorer 将站点的 Cookie 保存在文件名格式为 <user>@<domain>.txt 的文件中,其中 <user> 是您的帐户名。
C# 代码 复制
 
 if (Request.Cookies["userName"]!=null)
if (Request.Cookies["userName"]!=null)
 {
{
 string str = Request.Cookies("userName").Value;
  string str = Request.Cookies("userName").Value; 
 }
}
 
 //多值Cookie的读取
//多值Cookie的读取
 if (Request.Cookies["userInfo1"]!=null )
if (Request.Cookies["userInfo1"]!=null )
 {
{
 string name=Request.Cookies["userInfo1"]["name"];
  string name=Request.Cookies["userInfo1"]["name"];
 string last=Request.Cookies["userInfo1"]["last"];
  string last=Request.Cookies["userInfo1"]["last"]; 
 }
}
 
 
 //读取 Cookie 集合
//读取 Cookie 集合
 for(int i = 0 ;i<Request.Cookies.Count ;i++)
for(int i = 0 ;i<Request.Cookies.Count ;i++)
 {
{
 HttpCookie cookies = Request.Cookies;
    HttpCookie cookies = Request.Cookies;
 Response.Write("name="+cookies.Mame+"<br/>");
    Response.Write("name="+cookies.Mame+"<br/>");
 if (cookies.HasKeys )//是否有子键
    if (cookies.HasKeys )//是否有子键
 {
    {
 System.Collections.Specialized.NameValueCollection NameColl
        System.Collections.Specialized.NameValueCollection NameColl 
 = aCookie.Values ;
                                             = aCookie.Values ;
 for(int j=0;j<NameColl.Count;j++)
        for(int j=0;j<NameColl.Count;j++)
 {
        {
 Response.Write("子键名="+ NameColl.AllKey[j] +"<br/>");
            Response.Write("子键名="+ NameColl.AllKey[j] +"<br/>");
 Response.Write("子键值="+ NameColl[j] +"<br/>");
            Response.Write("子键值="+ NameColl[j] +"<br/>");
 }
        }
 
 }
    }
 else
    else
 {
    {
 Response.Write("value="+cookies.Value+"<br/>");
        Response.Write("value="+cookies.Value+"<br/>");        
 }
    }
 }
}

注意:在获取Cookie的值之前,应该确保该 Cookie 确实存在。否则,您将得到一个异常
三、修改 Cookie
修改的方法与创建方法相同
四、删除 Cookie
将其有效期设置为过去的某个日期。当浏览器检查 Cookie 的有效期时,就会删除这个已过期的 Cookie。
 
 
 //删除cookie下的属性
//删除cookie下的属性
 
 
 HttpCookie acookie=Request.Cookies["Info"];
 HttpCookie acookie=Request.Cookies["Info"];
 acookie.Values.Remove("userid");
 acookie.Values.Remove("userid");
 acookie.Expires = DateTime.Now.AddDays(1);
 acookie.Expires = DateTime.Now.AddDays(1);
 Response.Cookies.Add(acookie);
 Response.Cookies.Add(acookie);        
 
 //删除所有cookie,就是设置过期时间为现在就行了
//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;
 int limit=Request.Cookies.Count - 1;
 for(int i=0;i<limit;i++)
 for(int i=0;i<limit;i++)
 {
 {
 acookie = Request.Cookies(i)
     acookie = Request.Cookies(i)
 acookie.Expires = DateTime.Now.AddDays(-1)
     acookie.Expires = DateTime.Now.AddDays(-1)
 Response.Cookies.Add(acookie)
     Response.Cookies.Add(acookie)
 }
 }    

五、ASP.NET对Cookie操作的公用类
C# 代码 复制
 
 
 using System;
using System;
 using System.Collections.Generic;
using System.Collections.Generic;
 using System.Linq;
using System.Linq;
 using System.Text;
using System.Text;
 using System.Web;
using System.Web;
 using System.Collections.Specialized;
using System.Collections.Specialized;
 
 
 
 namespace Core.Common.Web
namespace Core.Common.Web
 {
{
 
 /// <summary>
    /// <summary>
 /// Cookie静态操作类
    /// Cookie静态操作类
 /// </summary>
    /// </summary>
 
 public static class Cookie
    public static class Cookie
 {
    {
 
 #region 静态方法
        #region 静态方法
 
 /// <summary>
        /// <summary>
 /// 创建或修改COOKIE对象并赋Value值
        /// 创建或修改COOKIE对象并赋Value值
 /// </summary>
        /// </summary>
 
 /// <param name="strCookieName">COOKIE对象名</param>
        /// <param name="strCookieName">COOKIE对象名</param>
 /// <param name="strValue">COOKIE对象Value值</param>
        /// <param name="strValue">COOKIE对象Value值</param>
 /// <remarks>
        /// <remarks>
 /// 对COOKIE修改必须重新设Expires
        /// 对COOKIE修改必须重新设Expires
 /// </remarks>
        /// </remarks>
 
 public static void SetObject(string strCookieName, string strValue)
        public static void SetObject(string strCookieName, string strValue)
 {
        {
 SetObject(strCookieName, 1, strValue);
            SetObject(strCookieName, 1, strValue);
 }
        }
 
 
 
 /// <summary>
        /// <summary>
 /// 创建或修改COOKIE对象并赋Value值
        /// 创建或修改COOKIE对象并赋Value值
 /// </summary>
        /// </summary>
 
 /// <param name="strCookieName">COOKIE对象名</param>
        /// <param name="strCookieName">COOKIE对象名</param>
 /// <param name="iExpires">
        /// <param name="iExpires">
 /// COOKIE对象有效时间(秒数)
        /// COOKIE对象有效时间(秒数)
 /// 1表示永久有效,0和负数都表示不设有效时间
        /// 1表示永久有效,0和负数都表示不设有效时间
 /// 大于等于2表示具体有效秒数
        /// 大于等于2表示具体有效秒数
 /// 86400秒 = 1天 = (60*60*24)
        /// 86400秒 = 1天 = (60*60*24)
 /// 604800秒 = 1周 = (60*60*24*7)
        /// 604800秒 = 1周 = (60*60*24*7)
 /// 2593000秒 = 1月 = (60*60*24*30)
        /// 2593000秒 = 1月 = (60*60*24*30)
 /// 31536000秒 = 1年 = (60*60*24*365)
        /// 31536000秒 = 1年 = (60*60*24*365)
 /// </param>
        /// </param>
 /// <param name="strValue">COOKIE对象Value值</param>
        /// <param name="strValue">COOKIE对象Value值</param>
 /// <remarks>
        /// <remarks>
 /// 对COOKIE修改必须重新设Expires
        /// 对COOKIE修改必须重新设Expires
 /// </remarks>
        /// </remarks>
 
 public static void SetObject(string strCookieName, int iExpires, string strValue)
        public static void SetObject(string strCookieName, int iExpires, string strValue)
 {
        {
 HttpCookie objCookie = new HttpCookie(strCookieName.Trim());
            HttpCookie objCookie = new HttpCookie(strCookieName.Trim());
 objCookie.Value = HttpContext.Current.Server.UrlEncode(strValue.Trim());
            objCookie.Value = HttpContext.Current.Server.UrlEncode(strValue.Trim());
 
 if (iExpires > 0)
            if (iExpires > 0)
 {
            {
 if (iExpires == 1)
                if (iExpires == 1)
 {
                {
 objCookie.Expires = DateTime.MaxValue;
                    objCookie.Expires = DateTime.MaxValue;
 }
                }
 else
                else
 {
                {
 objCookie.Expires = DateTime.Now.AddSeconds(iExpires);
                    objCookie.Expires = DateTime.Now.AddSeconds(iExpires);
 }
                }
 }
            }
 HttpContext.Current.Response.Cookies.Add(objCookie);
            HttpContext.Current.Response.Cookies.Add(objCookie);
 }
        }
 
 
 
 
 /// <summary>
        /// <summary>
 /// 创建COOKIE对象并赋多个KEY键值
        /// 创建COOKIE对象并赋多个KEY键值
 /// </summary>
        /// </summary>
 
 /// <param name="strCookieName">COOKIE对象名</param>
        /// <param name="strCookieName">COOKIE对象名</param>
 /// <param name="iExpires">
        /// <param name="iExpires">
 /// COOKIE对象有效时间(秒数)
        /// COOKIE对象有效时间(秒数)
 /// </param>
        /// </param>
 /// <param name="KeyValue">键/值对集合</param>
        /// <param name="KeyValue">键/值对集合</param>
 
 public static void SetObject(string strCookieName, int iExpires, NameValueCollection KeyValue)
        public static void SetObject(string strCookieName, int iExpires, NameValueCollection KeyValue)
 {
        {
 HttpCookie objCookie = new HttpCookie(strCookieName.Trim());
            HttpCookie objCookie = new HttpCookie(strCookieName.Trim());
 
 foreach (string key in KeyValue.AllKeys)
            foreach (string key in KeyValue.AllKeys)
 {
            {
 objCookie[key] =
                objCookie[key] =