/// <summary>
/// 添加缓存(如果缓存键已经存在，则此方法调用无效)
/// </summary>
/// <typeparam name="T">类型</typeparam>
/// <param name="key">缓存键</param>
/// <param name="value">值</param>
/// <param name="CacheTimeOption">缓存时间</param>
/// <param name="CacheExpirationOption">缓存过期时间类别（绝对/弹性）</param>
public static void Set <T>(string key, T value, CacheTimeOption CacheTimeOption, CacheExpirationOption CacheExpirationOption)
{
Set(key, value, CacheTimeOption, CacheExpirationOption, null, CacheItemPriority.NotRemovable, null);
}
/// <summary>
/// 添加缓存(如果缓存键已经存在，则此方法调用无效)
/// </summary>
/// <typeparam name="T">类型</typeparam>
/// <param name="key">缓存键</param>
/// <param name="value">值</param>
/// <param name="CacheTimeOption">缓存时间</param>
/// <param name="CacheExpirationOption">缓存过期时间类别（绝对/弹性）</param>
/// <param name="dependencies">缓存依赖项</param>
public static void Set <T>(string key, T value, CacheTimeOption CacheTimeOption, CacheExpirationOption CacheExpirationOption,
CacheDependency dependencies)
{
Set(key, value, CacheTimeOption, CacheExpirationOption, dependencies, CacheItemPriority.NotRemovable, null);
}
/// <summary>
/// 获取弹性时间过期时间
/// </summary>
/// <param name="CacheTimeOption">缓存的时间长短</param>
/// <param name="CacheExpirationOption"></param>
/// <returns></returns>
private static TimeSpan GetSlidingExpirationTime(CacheTimeOption CacheTimeOption, CacheExpirationOption CacheExpirationOption)
{
if (CacheExpirationOption == CacheExpirationOption.AbsoluteExpiration ||
CacheTimeOption == CacheTimeOption.NotRemovable)
{
return(Cache.NoSlidingExpiration);
}
return(TimeSpan.FromMinutes((int)CacheTimeOption));
}
// 主调方法
/// <summary>
/// 添加缓存(如果缓存键已经存在，则此方法调用无效)
/// </summary>
/// <typeparam name="T">类型</typeparam>
/// <param name="key">缓存键</param>
/// <param name="value">值</param>
/// <param name="CacheTimeOption">缓存的时间长短</param>
/// <param name="CacheExpirationOption"></param>
/// <param name="dependencies">缓存依赖项</param>
/// <param name="cacheItemPriority">优先级</param>
/// <param name="callback">回调函数</param>
public static void Set <T>(string key, T value, CacheTimeOption CacheTimeOption, CacheExpirationOption CacheExpirationOption,
CacheDependency dependencies, CacheItemPriority cacheItemPriority, CacheItemRemovedCallback callback)
{
if (!value.Equals(default(T)) && CacheTimeOption != CacheTimeOption.None)
{
DateTime absoluteExpiration = GetAbsoluteExpirationTime(CacheTimeOption, CacheExpirationOption);
TimeSpan slidingExpiration = GetSlidingExpirationTime(CacheTimeOption, CacheExpirationOption);
HttpRuntime.Cache.Add(key, value, dependencies, absoluteExpiration, slidingExpiration, cacheItemPriority, callback);
}
}
/// <summary>
/// 获取绝对日期时间
/// </summary>
/// <param name="CacheTimeOption">缓存的时间长短</param>
/// <param name="CacheExpirationOption"></param>
/// <returns></returns>
public static DateTime GetAbsoluteExpirationTime(CacheTimeOption CacheTimeOption, CacheExpirationOption CacheExpirationOption)
{
if (CacheExpirationOption == CacheExpirationOption.SlidingExpiration ||
CacheTimeOption == CacheTimeOption.NotRemovable)
{
return(Cache.NoAbsoluteExpiration);
}
return(DateTime.Now.AddMinutes((int)CacheTimeOption));
}
