一、添加cookie
C# 代码 复制
//方式1:
Response.Cookies["username"].value="gggg";
Response.Cookies["username"].Expires=DateTime.MaxValue;
//方式2:
HttpCookie acookie = new HttpCookie("last");
acookie.Value="a";
acookie..Expires=DateTime.MaxValue;
Response.Cookies.Add(acookie);
//多值Cookie的写法
//方式1:
Response.Cookies["userinfo1"]["name"].value="aaa";
Response.Cookies["userinfo1"]["last"].value="a";
Response.Cookies["userinfo1"].Expires=DateTime.MaxValue;
//方式2:
HttpCookie cookie = new HttpCookie("userinfo1");
cookie.Values["name"]="aaa";
cookie.Values["last"]="a";
cookie.Expires=DateTime.MaxValue;
//cookie.Expires = System.DateTime.Now.AddDays(1);//设置过期时间 1天
Response.Cookies.Add(cookie);
![](http://www.studyofnet.com/Codefan-Controls/OutliningIndicators/None.gif)
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)
{
string str = Request.Cookies("userName").Value;
}
//多值Cookie的读取
if (Request.Cookies["userInfo1"]!=null )
{
string name=Request.Cookies["userInfo1"]["name"];
string last=Request.Cookies["userInfo1"]["last"];
}
//读取 Cookie 集合
for(int i = 0 ;i<Request.Cookies.Count ;i++)
{
HttpCookie cookies = Request.Cookies;
Response.Write("name="+cookies.Mame+"<br/>");
if (cookies.HasKeys )//是否有子键
{
System.Collections.Specialized.NameValueCollection NameColl
= aCookie.Values ;
for(int j=0;j<NameColl.Count;j++)
{
Response.Write("子键名="+ NameColl.AllKey[j] +"<br/>");
Response.Write("子键值="+ NameColl[j] +"<br/>");
}
}
else
{
Response.Write("value="+cookies.Value+"<br/>");
}
}
![](http://www.studyofnet.com/Codefan-Controls/OutliningIndicators/None.gif)
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。
C# 代码 复制
//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)
}
![](http://www.studyofnet.com/Codefan-Controls/OutliningIndicators/None.gif)
五、ASP.NET对Cookie操作的公用类
C# 代码 复制
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Web;
using System.Collections.Specialized;
namespace Core.Common.Web
{
/// <summary>
/// Cookie静态操作类
/// </summary>
public static class Cookie
{
#region 静态方法
/// <summary>
/// 创建或修改COOKIE对象并赋Value值
/// </summary>
/// <param name="strCookieName">COOKIE对象名</param>
/// <param name="strValue">COOKIE对象Value值</param>
/// <remarks>
/// 对COOKIE修改必须重新设Expires
/// </remarks>
public static void SetObject(string strCookieName, string strValue)
{
SetObject(strCookieName, 1, strValue);
}
/// <summary>
/// 创建或修改COOKIE对象并赋Value值
/// </summary>
/// <param name="strCookieName">COOKIE对象名</param>
/// <param name="iExpires">
/// 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
/// 大于等于2表示具体有效秒数
/// 86400秒 = 1天 = (60*60*24)
/// 604800秒 = 1周 = (60*60*24*7)
/// 2593000秒 = 1月 = (60*60*24*30)
/// 31536000秒 = 1年 = (60*60*24*365)
/// </param>
/// <param name="strValue">COOKIE对象Value值</param>
/// <remarks>
/// 对COOKIE修改必须重新设Expires
/// </remarks>
public static void SetObject(string strCookieName, int iExpires, string strValue)
{
HttpCookie objCookie = new HttpCookie(strCookieName.Trim());
objCookie.Value = HttpContext.Current.Server.UrlEncode(strValue.Trim());
if (iExpires > 0)
{
if (iExpires == 1)
{
objCookie.Expires = DateTime.MaxValue;
}
else
{
objCookie.Expires = DateTime.Now.AddSeconds(iExpires);
}
}
HttpContext.Current.Response.Cookies.Add(objCookie);
}
/// <summary>
/// 创建COOKIE对象并赋多个KEY键值
/// </summary>
/// <param name="strCookieName">COOKIE对象名</param>
/// <param name="iExpires">
/// COOKIE对象有效时间(秒数)
/// </param>
/// <param name="KeyValue">键/值对集合</param>
public static void SetObject(string strCookieName, int iExpires, NameValueCollection KeyValue)
{
HttpCookie objCookie = new