CacheHelper

Posted 2020-10-29 jiayc

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());

            }

        }

 

    }

}