C#資料緩衝介紹及Caching通用協助類整理

標籤：cache   緩衝   資料   類   常用協助類   

C#緩衝主要是為了提高資料的讀取速度。因為伺服器和應用用戶端之間存在著流量的瓶頸，所以讀取大容量資料時，使用緩衝來直接為用戶端服務，可以減少用戶端與伺服器端的資料互動，從而大大提高程式的效能。

以下為工作中經常用到的快取作業公用類庫整理：

using System;using System.Collections;using System.Collections.Generic;using System.Linq;using System.Web;using System.Web.Caching;using System.Web.Hosting;namespace ECS.Utility{    /// <summary>    /// Caching 的摘要說明    /// </summary>    public class Caching    {        /// <summary>        /// 擷取當前應用程式指定CacheKey的Cache值        /// </summary>        /// <param name="CacheKey"></param>        /// <returns></returns>y        public static object GetCache(string CacheKey)        {            System.Web.Caching.Cache objCache = HttpRuntime.Cache;            return objCache[CacheKey];        }        /// <summary>        /// 設定當前應用程式指定CacheKey的Cache值        /// </summary>        /// <param name="CacheKey"></param>        /// <param name="objObject"></param>        public static void SetCache(string CacheKey, object objObject)        {            System.Web.Caching.Cache objCache = HttpRuntime.Cache;            objCache.Insert(CacheKey, objObject);        }        /// <summary>        /// 設定當前應用程式指定CacheKey的Cache值        /// </summary>        /// <param name="CacheKey"></param>        /// <param name="objObject"></param>        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>        /// 清除單一金鑰快取        /// </summary>        /// <param name="key"></param>        public static void RemoveKeyCache(string CacheKey)        {            try            {                System.Web.Caching.Cache objCache = HttpRuntime.Cache;                objCache.Remove(CacheKey);            }            catch { }        }        /// <summary>        /// 清除所有緩衝        /// </summary>        public static void RemoveAllCache()        {            System.Web.Caching.Cache _cache = HttpRuntime.Cache;            IDictionaryEnumerator CacheEnum = _cache.GetEnumerator();            if (_cache.Count > 0)            {                ArrayList al = new ArrayList();                while (CacheEnum.MoveNext())                {                    al.Add(CacheEnum.Key);                }                foreach (string key in al)                {                    _cache.Remove(key);                }            }        }        /// <summary>        /// 以列表形式返回已存在的所有緩衝         /// </summary>        /// <returns></returns>         public static ArrayList ShowAllCache()        {            ArrayList al = new ArrayList();            System.Web.Caching.Cache _cache = HttpRuntime.Cache;            if (_cache.Count > 0)            {                IDictionaryEnumerator CacheEnum = _cache.GetEnumerator();                while (CacheEnum.MoveNext())                {                    al.Add(CacheEnum.Key);                }            }            return al;        }    }}

C#資料緩衝介紹及Caching通用協助類整理