[csharp]
/// <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
}
