CacheHelper

最新推荐文章于 2024-02-03 10:34:23 发布

转载最新推荐文章于 2024-02-03 10:34:23 发布 · 85 阅读

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原文链接：http://www.cnblogs.com/daimaxuejia/p/7735189.html

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#测试

本文介绍了一个用于 ASP.NET MVC5 的缓存辅助类，该类提供了插入缓存项、设置缓存过期时间及获取缓存对象的方法。支持通过文件依赖自动更新缓存及指定缓存的有效期。

using System;
using System.Collections.Generic;
using System.Text;
using System.Web;
using System.Web.Caching;

namespace DC.Website.MVC5.Helpers
{
public class CacheHelper
{
/// <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;
}

}
}

转载于:https://www.cnblogs.com/daimaxuejia/p/7735189.html