C# WebHelper-CookieHelper，CacheHelper，SessionHelper

常用web操作工具类，记录一下，本文记录的工具类，都要求引用 System.Web

1、CookieHelper

/// <summary>
    /// Cookie工具类
    /// </summary>
    public class CookieHelper
    {
        /// <summary>
        /// 清除指定Cookie
        /// </summary>
        /// <param name="cookiename">cookiename</param>
        public static void ClearCookie(string cookiename)
        {
            HttpCookie cookie = HttpContext.Current.Request.Cookies[cookiename];
            if (cookie != null)
            {
                cookie.Expires = DateTime.Now.AddYears(-3);
                HttpContext.Current.Response.Cookies.Add(cookie);
            }
        }
        /// <summary>
        /// 获取指定Cookie值
        /// </summary>
        /// <param name="cookiename">cookiename</param>
        /// <returns></returns>
        public static string GetCookieValue(string cookiename)
        {
            HttpCookie cookie = HttpContext.Current.Request.Cookies[cookiename];
            string str = string.Empty;
            if (cookie != null)
            {
                str = cookie.Value;
            }
            return str;
        }
        /// <summary>
        /// 添加一个Cookie（24小时过期）
        /// </summary>
        /// <param name="cookiename"></param>
        /// <param name="cookievalue"></param>
        public static void SetCookie(string cookiename, string cookievalue)
        {
            SetCookie(cookiename, cookievalue, DateTime.Now.AddDays(1.0));
        }
        /// <summary>
        /// 添加一个Cookie
        /// </summary>
        /// <param name="cookiename">cookie名</param>
        /// <param name="cookievalue">cookie值</param>
        /// <param name="expires">过期时间 DateTime</param>
        public static void SetCookie(string cookiename, string cookievalue, DateTime expires)
        {
            HttpCookie cookie = new HttpCookie(cookiename)
            {
                Value = cookievalue,
                Expires = expires
            };
            HttpContext.Current.Response.Cookies.Add(cookie);
        }
    }

 2、SessionHelper

/// <summary>
    /// Session 操作类
    /// </summary>
    public class SessionHelper
    {
        /// <summary>
        /// 根据session名获取session对象
        /// </summary>
        /// <param name="name">session 名</param>
        /// <returns></returns>
        public static object GetSession(string name)
        {
            return HttpContext.Current.Session[name];
        }
        /// <summary>
        /// 设置session
        /// </summary>
        /// <param name="name">session 名</param>
        /// <param name="val">session 值</param>
        public static void SetSession(string name, object val)
        {
            HttpContext.Current.Session.Remove(name);
            HttpContext.Current.Session.Add(name, val);
        }
        /// <summary>
        /// 添加Session，调动有效期为20分钟
        /// </summary>
        /// <param name="strSessionName">Session对象名称</param>
        /// <param name="strValue">Session值</param>
        public static void Add(string strSessionName, string strValue)
        {
            HttpContext.Current.Session[strSessionName] = strValue;
            HttpContext.Current.Session.Timeout = 20;
        }

        /// <summary>
        /// 添加Session，调动有效期为20分钟
        /// </summary>
        /// <param name="strSessionName">Session对象名称</param>
        /// <param name="strValues">Session值数组</param>
        public static void Adds(string strSessionName, string[] strValues)
        {
            HttpContext.Current.Session[strSessionName] = strValues;
            HttpContext.Current.Session.Timeout = 20;
        }

        /// <summary>
        /// 添加Session
        /// </summary>
        /// <param name="strSessionName">Session对象名称</param>
        /// <param name="strValue">Session值</param>
        /// <param name="iExpires">调动有效期（分钟）</param>
        public static void Add(string strSessionName, string strValue, int iExpires)
        {
            HttpContext.Current.Session[strSessionName] = strValue;
            HttpContext.Current.Session.Timeout = iExpires;
        }

        /// <summary>
        /// 添加Session
        /// </summary>
        /// <param name="strSessionName">Session对象名称</param>
        /// <param name="strValues">Session值数组</param>
        /// <param name="iExpires">调动有效期（分钟）</param>
        public static void Adds(string strSessionName, string[] strValues, int iExpires)
        {
            HttpContext.Current.Session[strSessionName] = strValues;
            HttpContext.Current.Session.Timeout = iExpires;
        }

        /// <summary>
        /// 读取某个Session对象值
        /// </summary>
        /// <param name="strSessionName">Session对象名称</param>
        /// <returns>Session对象值</returns>
        public static object Get(string strSessionName)
        {
            if (HttpContext.Current.Session[strSessionName] == null)
            {
                return null;
            }
            else
            {
                return HttpContext.Current.Session[strSessionName];
            }
        }

        /// <summary>
        /// 读取某个Session对象值数组
        /// </summary>
        /// <param name="strSessionName">Session对象名称</param>
        /// <returns>Session对象值数组</returns>
        public static string[] Gets(string strSessionName)
        {
            if (HttpContext.Current.Session[strSessionName] == null)
            {
                return null;
            }
            else
            {
                return (string[])HttpContext.Current.Session[strSessionName];
            }
        }

        /// <summary>
        /// 删除某个Session对象
        /// </summary>
        /// <param name="strSessionName">Session对象名称</param>
        public static void Del(string strSessionName)
        {
            HttpContext.Current.Session[strSessionName] = null;
        }
    }

3、CacheHelper

/// <summary>
    /// 缓存辅助类
    /// </summary>
    public class CacheHelper
    {
        /// <summary>
        /// 获取数据缓存
        /// </summary>
        /// <param name="CacheKey">键</param>
        public static object GetCache(string CacheKey)
        {
            System.Web.Caching.Cache objCache = HttpRuntime.Cache;
            return objCache[CacheKey];
        }

        /// <summary>
        /// 设置数据缓存
        /// </summary>
        public static void SetCache(string CacheKey, object objObject)
        {
            System.Web.Caching.Cache objCache = HttpRuntime.Cache;
            objCache.Insert(CacheKey, objObject);
        }

        /// <summary>
        /// 设置数据缓存
        /// </summary>
        public static void SetCache(string CacheKey, object objObject, TimeSpan Timeout)
        {
            System.Web.Caching.Cache objCache = HttpRuntime.Cache;
            objCache.Insert(CacheKey, objObject, null, DateTime.MaxValue, Timeout, System.Web.Caching.CacheItemPriority.NotRemovable, null);
        }

        /// <summary>
        /// 设置数据缓存
        /// </summary>
        public static void SetCache(string CacheKey, object objObject, DateTime absoluteExpiration, TimeSpan slidingExpiration)
        {
            System.Web.Caching.Cache objCache = HttpRuntime.Cache;
            objCache.Insert(CacheKey, objObject, null, absoluteExpiration, slidingExpiration);
        }

        /// <summary>
        /// 移除指定数据缓存
        /// </summary>
        public static void RemoveAllCache(string CacheKey)
        {
            System.Web.Caching.Cache _cache = HttpRuntime.Cache;
            _cache.Remove(CacheKey);
        }

        /// <summary>
        /// 移除全部缓存
        /// </summary>
        public static void RemoveAllCache()
        {
            System.Web.Caching.Cache _cache = HttpRuntime.Cache;
            IDictionaryEnumerator CacheEnum = _cache.GetEnumerator();
            while (CacheEnum.MoveNext())
            {
                _cache.Remove(CacheEnum.Key.ToString());
            }
        }
    }