C#操作Cookie封装类CookieHelper

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    using System;  
    using System.Collections.Generic;  
    using System.Linq;  
    using System.Text;  
    using System.Web;  
    using System.Collections.Specialized;  
       
    namespace Utility.Helper  
    {  
        /// <summary>  
        /// Cookie操作类  
        /// </summary>  
        public static class CookieHelper  
        {  
            /// <summary>  
            /// 创建COOKIE对象并赋Value值,修改COOKIE的Value值也用此方法,因为对COOKIE修改必须重新设Expires  
            /// </summary>  
            /// <param name="strCookieName">COOKIE对象名</param>  
            /// <param name="strValue">COOKIE对象Value值</param>  
            public static void SetObj(string strCookieName, string strValue)  
            {  
                SetObj(strCookieName, 1, strValue, "", "/");  
            }  
            /// <summary>  
            /// 创建COOKIE对象并赋Value值,修改COOKIE的Value值也用此方法,因为对COOKIE修改必须重新设Expires  
            /// </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,31536000秒=1年=(60*60*24*365),</param>  
            /// <param name="strValue">COOKIE对象Value值</param>  
            public static void SetObj(string strCookieName, int iExpires, string strValue)  
            {  
                SetObj(strCookieName, iExpires, strValue, "", "/");  
            }  
            /// <summary>  
            /// 创建COOKIE对象并赋Value值,修改COOKIE的Value值也用此方法,因为对COOKIE修改必须重新设Expires  
            /// </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,31536000秒=1年=(60*60*24*365),</param>  
            /// <param name="strValue">COOKIE对象Value值</param>  
            /// <param name="strDomains">作用域,多个域名用;隔开</param>  
            public static void SetObj(string strCookieName, int iExpires, string strValue, string strDomains)  
            {  
                SetObj(strCookieName, iExpires, strValue, strDomains, "/");  
            }  
            /// <summary>  
            /// 创建COOKIE对象并赋Value值,修改COOKIE的Value值也用此方法,因为对COOKIE修改必须重新设Expires  
            /// </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,31536000秒=1年=(60*60*24*365),</param>  
            /// <param name="strValue">COOKIE对象Value值</param>  
            /// <param name="strDomains">作用域,多个域名用;隔开</param>  
            /// <param name="strPath">作用路径</param>  
            public static void SetObj(string strCookieName, int iExpires, string strValue, string strDomains, string strPath)  
            {  
                string _strDomain = SelectDomain(strDomains);  
                HttpCookie objCookie = new HttpCookie(strCookieName.Trim());  
                objCookie.Value = HttpUtility.UrlEncode(strValue.Trim());  
                if (_strDomain.Length > 0)  
                    objCookie.Domain = _strDomain;  
                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  
            /// 设键/值如下:  
            /// NameValueCollection myCol = new NameValueCollection();  
            /// myCol.Add("red", "rojo");  
            /// myCol.Add("green", "verde");  
            /// myCol.Add("blue", "azul");  
            /// myCol.Add("red", "rouge");   结果“red:rojo,rouge;green:verde;blue:azul”  
            /// </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,31536000秒=1年=(60*60*24*365),</param>  
            /// <param name="KeyValue">键/值对集合</param>  
            public static void SetObj(string strCookieName, int iExpires, NameValueCollection KeyValue)  
            {  
                SetObj(strCookieName, iExpires, KeyValue, "", "/");  
            }  
            public static void SetObj(string strCookieName, int iExpires, NameValueCollection KeyValue, string strDomains)  
            {  
                SetObj(strCookieName, iExpires, KeyValue, strDomains, "/");  
            }  
            /// <summary>  
            /// 创建COOKIE对象并赋多个KEY键值  
            /// 设键/值如下:  
            /// NameValueCollection myCol = new NameValueCollection();  
            /// myCol.Add("red", "rojo");  
            /// myCol.Add("green", "verde");  
            /// myCol.Add("blue", "azul");  
            /// myCol.Add("red", "rouge");   结果“red:rojo,rouge;green:verde;blue:azul”  
            /// </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,31536000秒=1年=(60*60*24*365),</param>  
            /// <param name="KeyValue">键/值对集合</param>  
            /// <param name="strDomains">作用域,多个域名用;隔开</param>  
            /// <param name="strPath">作用路径</param>  
            public static void SetObj(string strCookieName, int iExpires, NameValueCollection KeyValue, string strDomains, string strPath)  
            {  
                string _strDomain = SelectDomain(strDomains);  
                HttpCookie objCookie = new HttpCookie(strCookieName.Trim());  
                foreach (String key in KeyValue.AllKeys)  
                {  
                    objCookie[key] = HttpUtility.UrlEncode(KeyValue[key].Trim());  
                }  
                if (_strDomain.Length > 0)  
                    objCookie.Domain = _strDomain;  
                objCookie.Path = strPath.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>  
            /// 读取Cookie某个对象的Value值,返回Value值,如果对象本就不存在,则返回字符串null  
            /// </summary>  
            /// <param name="strCookieName">Cookie对象名称</param>  
            /// <returns>Value值,如果对象本就不存在,则返回字符串null</returns>  
            public static string GetValue(string strCookieName)  
            {  
                if (HttpContext.Current.Request.Cookies[strCookieName] == null)  
                {  
                    return null;  
                }  
                else  
                {  
                    string _value = HttpContext.Current.Request.Cookies[strCookieName].Value;  
                    return HttpUtility.UrlDecode(_value);  
                }  
            }  
            /// <summary>  
            /// 读取Cookie某个对象的某个Key键的键值,返回Key键值,如果对象本就不存在,则返回字符串null,如果Key键不存在,则返回字符串"KeyNonexistence"  
            /// </summary>  
            /// <param name="strCookieName">Cookie对象名称</param>  
            /// <param name="strKeyName">Key键名</param>  
            /// <returns>Key键值,如果对象本就不存在,则返回字符串null,如果Key键不存在,则返回字符串"KeyNonexistence"</returns>  
            public static string GetValue(string strCookieName, string strKeyName)  
            {  
                if (HttpContext.Current.Request.Cookies[strCookieName] == null)  
                {  
                    return null;  
                }  
                else  
                {  
                    string strObjValue = HttpContext.Current.Request.Cookies[strCookieName].Value;  
                    string strKeyName2 = strKeyName + "=";  
                    //if (strObjValue.IndexOf(strKeyName2) == -1)  
                    if (!strObjValue.Contains(strKeyName2))  
                        return null;  
                    else  
                    {  
                        string _value = HttpContext.Current.Request.Cookies[strCookieName][strKeyName];  
                        return HttpUtility.UrlDecode(_value);  
                    }  
                }  
            }  
            /// <summary>  
            /// 修改某个COOKIE对象某个Key键的键值 或 给某个COOKIE对象添加Key键 都调用本方法,操作成功返回字符串"success",如果对象本就不存在,则返回字符串null。  
            /// </summary>  
            /// <param name="strCookieName">Cookie对象名称</param>  
            /// <param name="strKeyName">Key键名</param>  
            /// <param name="KeyValue">Key键值</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,31536000秒=1年=(60*60*24*365)。注意:虽是修改功能,实则重建覆盖,所以时间也要重设,因为没办法获得旧的有效期</param>  
            /// <returns>如果对象本就不存在,则返回字符串null,如果操作成功返回字符串"success"。</returns>  
            public static string Edit(string strCookieName, string strKeyName, string KeyValue, int iExpires)  
            {  
                return Edit(strCookieName, strKeyName, KeyValue, iExpires, "", "/");  
            }  
            /// <summary>  
            /// 修改某个COOKIE对象某个Key键的键值 或 给某个COOKIE对象添加Key键 都调用本方法,操作成功返回字符串"success",如果对象本就不存在,则返回字符串null。  
            /// </summary>  
            /// <param name="strCookieName">Cookie对象名称</param>  
            /// <param name="strKeyName">Key键名</param>  
            /// <param name="KeyValue">Key键值</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,31536000秒=1年=(60*60*24*365)。注意:虽是修改功能,实则重建覆盖,所以时间也要重设,因为没办法获得旧的有效期</param>  
            /// <param name="strPath">作用路径</param>  
            /// <returns>如果对象本就不存在,则返回字符串null,如果操作成功返回字符串"success"。</returns>  
            public static string Edit(string strCookieName, string strKeyName, string KeyValue, int iExpires, string strPath)  
            {  
                return Edit(strCookieName, strKeyName, KeyValue, iExpires, "", strPath);  
            }  
            /// <summary>  
            /// 修改某个COOKIE对象某个Key键的键值 或 给某个COOKIE对象添加Key键 都调用本方法,操作成功返回字符串"success",如果对象本就不存在,则返回字符串null。  
            /// </summary>  
            /// <param name="strCookieName">Cookie对象名称</param>  
            /// <param name="strKeyName">Key键名</param>  
            /// <param name="KeyValue">Key键值</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,31536000秒=1年=(60*60*24*365)。注意:虽是修改功能,实则重建覆盖,所以时间也要重设,因为没办法获得旧的有效期</param>  
            /// <param name="strDomains">作用域,多个域名用;隔开</param>  
            /// <param name="strPath">作用路径</param>  
            /// <returns>如果对象本就不存在,则返回字符串null,如果操作成功返回字符串"success"。</returns>  
            public static string Edit(string strCookieName, string strKeyName, string KeyValue, int iExpires, string strDomains, string strPath)  
            {  
                if (HttpContext.Current.Request.Cookies[strCookieName] == null)  
                    return null;  
                else  
                {  
                    HttpCookie objCookie = HttpContext.Current.Request.Cookies[strCookieName];  
                    objCookie[strKeyName] = HttpUtility.UrlEncode(KeyValue.Trim());  
                    if (iExpires > 0)  
                    {  
                        if (iExpires == 1)  
                            objCookie.Expires = DateTime.MaxValue;  
                        else  
                            objCookie.Expires = DateTime.Now.AddSeconds(iExpires);  
                    }  
                    HttpContext.Current.Response.Cookies.Add(objCookie);  
                    return "success";  
                }  
            }  
            /// <summary>  
            /// 删除COOKIE对象  
            /// </summary>  
            /// <param name="strCookieName">Cookie对象名称</param>  
            public static void Del(string strCookieName)  
            {  
                Del(strCookieName, "", "/");  
            }  
            /// <summary>  
            /// 删除COOKIE对象  
            /// </summary>  
            /// <param name="strCookieName">Cookie对象名称</param>  
            /// <param name="strDomains">作用域,多个域名用;隔开</param>  
            public static void Del(string strCookieName, string strDomains)  
            {  
                Del(strCookieName, strDomains, "/");  
            }  
            /// <summary>  
            /// 删除COOKIE对象  
            /// </summary>  
            /// <param name="strCookieName">Cookie对象名称</param>  
            /// <param name="strDomains">作用域,多个域名用;隔开</param>  
            /// <param name="strPath">作用路径</param>  
            public static void Del(string strCookieName, string strDomains, string strPath)  
            {  
                string _strDomain = SelectDomain(strDomains);  
                HttpCookie objCookie = new HttpCookie(strCookieName.Trim());  
                if (_strDomain.Length > 0)  
                    objCookie.Domain = _strDomain;  
                objCookie.Path = strPath.Trim();  
                objCookie.Expires = DateTime.Now.AddYears(-1);  
                HttpContext.Current.Response.Cookies.Add(objCookie);  
            }  
            /// <summary>  
            /// 删除某个COOKIE对象某个Key子键,操作成功返回字符串"success",如果对象本就不存在,则返回字符串null  
            /// </summary>  
            /// <param name="strCookieName">Cookie对象名称</param>  
            /// <param name="strKeyName">Key键名</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,31536000秒=1年=(60*60*24*365)。注意:虽是修改功能,实则重建覆盖,所以时间也要重设,因为没办法获得旧的有效期</param>  
            /// <returns>如果对象本就不存在,则返回字符串null,如果操作成功返回字符串"success"。</returns>  
            public static string DelKey(string strCookieName, string strKeyName, int iExpires)  
            {  
                if (HttpContext.Current.Request.Cookies[strCookieName] == null)  
                {  
                    return null;  
                }  
                else  
                {  
                    HttpCookie objCookie = HttpContext.Current.Request.Cookies[strCookieName];  
                    objCookie.Values.Remove(strKeyName);  
                    if (iExpires > 0)  
                    {  
                        if (iExpires == 1)  
                            objCookie.Expires = DateTime.MaxValue;  
                        else  
                            objCookie.Expires = DateTime.Now.AddSeconds(iExpires);  
                    }  
                    HttpContext.Current.Response.Cookies.Add(objCookie);  
                    return "success";  
                }  
            }  
            /// <summary>  
            /// 定位到正确的域  
            /// </summary>  
            /// <param name="strDomains"></param>  
            /// <returns></returns>  
            private static string SelectDomain(string strDomains)  
            {  
                bool _isLocalServer = false;  
                if (strDomains.Trim().Length == 0)  
                    return "";  
                string _thisDomain = HttpContext.Current.Request.ServerVariables["SERVER_NAME"].ToString();  
                //if (_thisDomain.IndexOf(".") < 0)//说明是计算机名,而不是域名  
                if (!_thisDomain.Contains("."))  
                    _isLocalServer = true;  
                string _strDomain = "www.abc.com";//这个域名是瞎扯  
                string[] _strDomains = strDomains.Split(';');  
                for (int i = 0; i < _strDomains.Length; i++)  
                {  
                    //if (_thisDomain.IndexOf(_strDomains[i].Trim()) < 0)//判断当前域名是否在作用域内  
                    if (!_thisDomain.Contains(_strDomains[i].Trim()))  
                        continue;  
                    else  
                    {  
                        //区分真实域名(或IP)与计算机名  
                        if (_isLocalServer)  
                            _strDomain = "";//作用域留空,否则Cookie不能写入  
                        else  
                            _strDomain = _strDomains[i].Trim();  
                        break;  
                    }  
                }  
                return _strDomain;  
            }  
        }  
    }