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  • CacheHelper

    using System;

    using System.Collections.Generic;
    using System.Linq;
    using System.Web;
    using System.Web.Caching;
     
    namespace WebApplication6.Comment
    {
        public class CacheHelper
        {
            /// <summary>
            /// 读取缓存数据
            /// </summary>
            /// <param name="cacheKey">键</param>
            /// <returns></returns>
            public static object GetCache(string cacheKey)
            {
                var objCache = HttpRuntime.Cache.Get(cacheKey);
                return objCache;
            }
     
            /// <summary>
            /// 设置缓存数据
            /// </summary>
            /// <param name="cacheKey">键</param>
            /// <param name="content">值</param>
            public static void SetCache(string cacheKey, object content)
            {
                var objCache = HttpRuntime.Cache;
                objCache.Insert(cacheKey, content);
            }
     
            /// <summary>
            /// 设置缓存数据并且设置默认过期时间
            /// </summary>
            /// <param name="cacheKey"></param>
            /// <param name="content"></param>
            /// <param name="timeOut"></param>
            public static void SetCache(string cacheKey, object content, int timeOut = 3600)
            {
                try
                {
                    if (content == null)
                    {
                        return;
                    }
                    var objCache = HttpRuntime.Cache;
                    //设置绝对过期时间
                    //绝对时间过期。DateTime.Now.AddSeconds(10)表示缓存在3600秒后过期,TimeSpan.Zero表示不使用平滑过期策略。
                    objCache.Insert(cacheKey, content, null, DateTime.Now.AddSeconds(timeOut), TimeSpan.Zero, CacheItemPriority.High, null);
                    //相对过期
                    //DateTime.MaxValue表示不使用绝对时间过期策略,TimeSpan.FromSeconds(10)表示缓存连续10秒没有访问就过期。
                    //objCache.Insert(cacheKey, objObject, null, DateTime.MaxValue, timeout, CacheItemPriority.NotRemovable, null); 
                }
                catch (Exception)
                {
     
                    throw;
                }
            }
     
            /// <summary>
            /// 移除指定缓存
            /// </summary>
            /// <param name="cacheKey">键</param>
            public static void RemoveAllCache(string cacheKey)
            {
                var objCache = HttpRuntime.Cache;
                objCache.Remove(cacheKey);
            }
     
            /// <summary>
            /// 删除全部缓存
            /// </summary>
            public static void RemoveAllCache()
            {
                var objCache = HttpRuntime.Cache;
                var cacheEnum = objCache.GetEnumerator();
                while (cacheEnum.MoveNext())
                {
                    objCache.Remove(cacheEnum.Key.ToString());
                }
            }
     
        }
    }
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  • 原文地址:https://www.cnblogs.com/jiayc/p/8693686.html
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