让Cookies操作变得向Session一样简单

很多开发者都会觉得使用Session比使用Cookies简单，不需要实例化，直接可以使用索引器；那么接下来我们将让Cookies操作达到Session一样的操作简单

建立类:

C# 代码

using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;

namespace testcookie
{
    public class CCookies
    {
        static CCookies instance = null;
        static readonly object padlock = new object();
        private CCookies()
        {
        }
        public static CCookies Cookie
        {
            get
            {
                lock (padlock)
                {
                    if (instance == null)
                        instance = new CCookies();
                    return instance;
                }
            }
        }

        public string this[string key]
        {
            get
            {
                return GetValue(key);
            }
            set
            {
                Add(key, value);
            }
        }

        /// <summary> 
        /// 添加Cookie 项 
        /// </summary> 
        /// <param name="key">键名</param> 
        /// <param name="value">键值</param> 
        public void Add(string key, string value)
        {
            HttpCookie cookie = HttpContext.Current.Request.Cookies["User"];
            if (cookie == null)
            {
                cookie = new HttpCookie("User");
                cookie.Expires = DateTime.Now.AddDays(1);
            }
            cookie.Values[key] = value;
            System.Web.HttpContext.Current.Response.Cookies.Add(cookie);
        }

        /// <summary> 
        /// 获取Cookie值 
        /// </summary> 
        /// <param name="key">键名</param> 
        /// <returns></returns> 
        public string GetValue(string key)
        {
            HttpCookie cookie = (HttpCookie)System.Web.HttpContext.Current.Request.Cookies["User"];
            if (cookie != null)
            {
                return cookie.Values[key];
            }
            return string.Empty;
        }

        /// <summary> 
        /// 移除Cookie值 
        /// </summary> 
        /// <param name="key">键名</param> 
        public void Remove(string key)
        {
            HttpCookie cookie = HttpContext.Current.Request.Cookies["User"];
            if (cookie != null)
            {
                cookie.Values.Remove(key);
                System.Web.HttpContext.Current.Response.Cookies.Add(cookie);
            }
        }
        /// <summary> 
        /// 清除 Cookie 
        /// </summary> 
        public void Clear()
        {
            HttpCookie cookie = (HttpCookie)System.Web.HttpContext.Current.Request.Cookies["User"];
            if (cookie != null)
            {
                cookie.Expires = System.DateTime.Now.AddDays(-2);
                cookie.Values.Clear();
                System.Web.HttpContext.Current.Response.Cookies.Add(cookie);
            }
        }
    }
}

使用实例:

C# 代码

testcookie.CCookies.Cookie.Add("A", "a"); 
testcookie.CCookies.Cookie["B"] = "b"; 
testcookie.CCookies.Cookie["C"] = "c"; 
 
Response.Write(testcookie.CCookies.Cookie["A"]); 
Response.Write(testcookie.CCookies.Cookie.GetValue("B")); 
Response.Write(testcookie.CCookies.Cookie["C"] + "<br>"); 
 
testcookie.CCookies.Cookie.Clear(); 
Response.Write(testcookie.CCookies.Cookie["A"]); 
Response.Write(testcookie.CCookies.Cookie.GetValue("B")); 
Response.Write(testcookie.CCookies.Cookie["C"]);

现在是不是操作很简单了呢？

当然，上面的代码还只能完成初步的工作，向cookies的domain,以及有效期都不能灵活设置，我们可以根据自己的项目去修改。

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