c#自带的缓存Cache是将缓存数据写在内存里面的，读取速度还是相当快的，也比较安全，由于是写在内存里面，一旦回收iis，Cache里面的缓存也会丢失。
public class CacheHelper { /// <summary> /// 创建缓存项的文件 /// </summary> /// <param name="key">缓存Key</param> /// <param name="obj">object对象</param> public static void Insert(string key, object obj) { //创建缓存 HttpContext.Current.Cache.Insert(key, obj); } /// <summary> /// 移除缓存项的文件 /// </summary> /// <param name="key">缓存Key</param> public static void Remove(string key) { //创建缓存 HttpContext.Current.Cache.Remove(key); } /// <summary> /// 创建缓存项的文件依赖 /// </summary> /// <param name="key">缓存Key</param> /// <param name="obj">object对象</param> /// <param name="fileName">文件绝对路径</param> public static void Insert(string key, object obj, string fileName) { //创建缓存依赖项 CacheDependency dep = new CacheDependency(fileName); //创建缓存 HttpContext.Current.Cache.Insert(key, obj, dep); }
/// <summary> /// 创建缓存项过期 /// </summary> /// <param name="key">缓存Key</param> /// <param name="obj">object对象</param> /// <param name="expires">过期时间(分钟)</param> public static void Insert(string key, object obj, int expires) { HttpContext.Current.Cache.Insert(key, obj, null, Cache.NoAbsoluteExpiration, new TimeSpan(0, expires, 0)); }
/// <summary> /// 获取缓存对象 /// </summary> /// <param name="key">缓存Key</param> /// <returns>object对象</returns> public static object Get(string key) { if (string.IsNullOrEmpty(key)) { return null; } return HttpContext.Current.Cache.Get(key); }
/// <summary> /// 获取缓存对象 /// </summary> /// <typeparam name="T">T对象</typeparam> /// <param name="key">缓存Key</param> /// <returns></returns> public static T Get<T>(string key) { object obj = Get(key); return obj == null ? default(T) : (T)obj; } /// <summary> /// 获取有所缓存key /// </summary> public static List<string> GetKeyAll() { List<string> cacheKeys = new List<string>(); var cacheEnum = HttpContext.Current.Cache.GetEnumerator(); while (cacheEnum.MoveNext()) { cacheKeys.Add(cacheEnum.Key.ToString()); } return cacheKeys; } }
