C#缓存主要是为了提高数据的读取速度。因为服务器和应用客户端之间存在着流量的瓶颈,所以读取大容量数据时,使用缓存来直接为客户端服务,可以减少客户端与服务器端的数据交互,从而大大提高程序的性能。
以下为工作中经常用到的缓存操作公用类库整理:
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 的摘要说明 /// </summary> public class Caching { /// <summary> /// 获取当前应用程序指定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> /// 设置当前应用程序指定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> /// 设置当前应用程序指定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> /// 清除单一键缓存 /// </summary> /// <param name="key"></param> public static void RemoveKeyCache(string CacheKey) { try { System.Web.Caching.Cache objCache = HttpRuntime.Cache; objCache.Remove(CacheKey); } catch { } } /// <summary> /// 清除所有缓存 /// </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缓存 /// </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; } } }
时间: 2024-10-12 19:41:48