AspNet.StarterKits.Classifieds.Web.FeaturedAdCache.GetFeaturedAd C# (CSharp) Метод

		public static CachedFeaturedAd GetFeaturedAd(HttpContext context)
		{
			if (context == null)
				return null;

			int featureCacheNumber = random.Next(0, NumCachedFeatures - 1);
			string cacheKey = GetCacheKey(featureCacheNumber);

			CachedFeaturedAd feature = context.Cache[cacheKey] as CachedFeaturedAd;
			if (feature == null)
			{
				feature = FetchFeaturedAd();
				if (feature != null)
				{
					DateTime expiration = DateTime.Now.AddMinutes(CacheLifeTime);
					context.Cache.Add(cacheKey, feature, null, expiration, TimeSpan.Zero, System.Web.Caching.CacheItemPriority.Normal, null);
				}
			}

			return feature;

		}