/// <summary>
/// 缓存帮助类
/// </summary>
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(, expires, ));
} /// <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;
} }
使用方法：
var _cache = CacheHelper.Get<User>(key);
if (_cache == null)
{
CacheHelper.Insert(key,obj,);//存入续存，30分钟
_cache = CacheHelper.Get<User>(key);
}
return _cache;