/// <summary>
/// View页面片断缓存
/// </summary>
/// <param name="html"></param>
/// <param name="cacheKey">缓存键</param>
/// <param name="cacheDependency">缓存依赖项</param>
/// <param name="absoluteExpiration">绝对过期时间</param>
/// <param name="slidingExpiration">滑动过期时间</param>
/// <param name="action">缓存无效时执行的页面内容片断</param>
public static void Cache(this HtmlHelper html,
string cacheKey,
CacheDependency cacheDependency,
DateTime absoluteExpiration,
TimeSpan slidingExpiration,
Action action)
{
Cache cache = html.ViewContext.HttpContext.Cache;
string content = cache.Get(cacheKey) as string;
if (content == null)
{
RecordWriter writer = html.GetRecordWriter();
StringBuilder recorder = new StringBuilder();
writer.AddRecorder(recorder);
action();
writer.RemoveRecorder(recorder);
content = recorder.ToString();
cache.Insert(cacheKey, content, cacheDependency, absoluteExpiration, slidingExpiration);
}
html.ViewContext.Writer.Write(content);
}