System.Web.UI.Page.InitOutputCache C# (CSharp) Метод

	protected virtual void InitOutputCache(int duration,
					       string varyByContentEncoding,
					       string varyByHeader,
					       string varyByCustom,
					       OutputCacheLocation location,
					       string varyByParam)
	{
		if (duration <= 0)
			// No need to do anything, cache will be ineffective anyway
			return;
		
		HttpResponse response = Response;
		HttpCachePolicy cache = response.Cache;
		bool set_vary = false;
		HttpContext ctx = Context;
		DateTime timestamp = ctx != null ? ctx.Timestamp : DateTime.Now;
		
		switch (location) {
			case OutputCacheLocation.Any:
				cache.SetCacheability (HttpCacheability.Public);
				cache.SetMaxAge (new TimeSpan (0, 0, duration));
				cache.SetLastModified (timestamp);
				set_vary = true;
				break;
			case OutputCacheLocation.Client:
				cache.SetCacheability (HttpCacheability.Private);
				cache.SetMaxAge (new TimeSpan (0, 0, duration));
				cache.SetLastModified (timestamp);
				break;
			case OutputCacheLocation.Downstream:
				cache.SetCacheability (HttpCacheability.Public);
				cache.SetMaxAge (new TimeSpan (0, 0, duration));
				cache.SetLastModified (timestamp);
				break;
			case OutputCacheLocation.Server:			
				cache.SetCacheability (HttpCacheability.Server);
				set_vary = true;
				break;
			case OutputCacheLocation.None:
				break;
		}

		if (set_vary) {
			if (varyByCustom != null)
				cache.SetVaryByCustom (varyByCustom);

			if (varyByParam != null && varyByParam.Length > 0) {
				string[] prms = varyByParam.Split (';');
				foreach (string p in prms)
					cache.VaryByParams [p.Trim ()] = true;
				cache.VaryByParams.IgnoreParams = false;
			} else {
				cache.VaryByParams.IgnoreParams = true;
			}
			
			if (varyByHeader != null && varyByHeader.Length > 0) {
				string[] hdrs = varyByHeader.Split (';');
				foreach (string h in hdrs)
					cache.VaryByHeaders [h.Trim ()] = true;
			}

			if (PageAdapter != null) {
				if (PageAdapter.CacheVaryByParams != null) {
					foreach (string p in PageAdapter.CacheVaryByParams)
						cache.VaryByParams [p] = true;
				}
				if (PageAdapter.CacheVaryByHeaders != null) {
					foreach (string h in PageAdapter.CacheVaryByHeaders)
						cache.VaryByHeaders [h] = true;
				}
			}
		}

		response.IsCached = true;
		cache.Duration = duration;
		cache.SetExpires (timestamp.AddSeconds (duration));
	}