asp.net中缓存类DataCache（依赖文件缓存和时间缓存，或两者）
/// <summary> /// 数据缓存类 /// </summary> public class DataCache { #region 缓存依赖文件web.config private static string _webconfigfile = string.Empty; /// <summary> /// 缓存依赖文件web.config /// </summary> public static string webconfigfile { get { if (_webconfigfile == string.Empty) _webconfigfile = HttpContext.Current.Server.MapPath("/web.config"); return _webconfigfile; } } #endregion #region 删除缓存 /// <summary> /// 删除缓存 /// </summary> /// <param name="CacheKey">键</param> public static void DeleteCache(string CacheKey) { HttpRuntime.Cache.Remove(CacheKey); } #endregion #region 获取缓存 /// <summary> /// 获取缓存 /// </summary> /// <param name="CacheKey">键</param> /// <returns></returns> public static object GetCache(string CacheKey) { return HttpRuntime.Cache[CacheKey]; } #endregion #region 简单的插入缓存 /// <summary> /// 简单的插入缓存 /// </summary> /// <param name="CacheKey">键</param> /// <param name="objObject">数据</param> public static void SetCache(string CacheKey, object objObject) { HttpRuntime.Cache.Insert(CacheKey, objObject); } #endregion #region 有过期时间的插入缓存数据 /// <summary> /// 有过期时间的插入缓存数据 /// </summary> /// <param name="CacheKey">键</param> /// <param name="objObject">数据</param> /// <param name="absoluteExpiration">过期时间</param> /// <param name="slidingExpiration">可调度参数，传null就是禁用可调度</param> public static void SetCache(string CacheKey, object objObject, DateTime absoluteExpiration, TimeSpan slidingExpiration) { if (slidingExpiration == null) slidingExpiration = Cache.NoSlidingExpiration; HttpRuntime.Cache.Insert(CacheKey, objObject, null, absoluteExpiration, slidingExpiration); } #endregion #region 插入缓存数据，指定缓存多少秒 /// <summary> /// 插入缓存数据，指定缓存多少秒 /// </summary> /// <param name="CacheKey">缓存的键</param> /// <param name="objObject">缓存的数据</param> /// <param name="seconds">缓存秒数</param> /// <param name="slidingExpiration">传null就是禁用可调度过期</param> public static void SetCacheSecond(string CacheKey, object objObject, int seconds, TimeSpan slidingExpiration) { DateTime absoluteExpiration = DateTime.Now.AddSeconds(seconds); if (slidingExpiration == null) slidingExpiration = Cache.NoSlidingExpiration; HttpRuntime.Cache.Insert(CacheKey, objObject, null, absoluteExpiration, slidingExpiration); } #endregion #region 依赖文件的缓存，文件没改不会过期 /// <summary> /// 依赖文件的缓存，文件没改不会过期 /// </summary> /// <param name="CacheKey">键</param> /// <param name="objObject">数据</param> /// <param name="depfilename">依赖文件，可调用 DataCache 里的变量</param> public static void SetCacheDepFile(string CacheKey, object objObject, string depfilename) { //缓存依赖对象 System.Web.Caching.CacheDependency dep = new System.Web.Caching.CacheDependency(depfilename); System.Web.Caching.Cache objCache = HttpRuntime.Cache; objCache.Insert( CacheKey, objObject, dep, System.Web.Caching.Cache.NoAbsoluteExpiration, //从不过期 System.Web.Caching.Cache.NoSlidingExpiration, //禁用可调过期 System.Web.Caching.CacheItemPriority.Default, null); } #endregion }