httpruntime.cache

问题 I have two ASP.NET 2.0 applications in IIS; a public booking system and an admin system to manage prices. There is a shared DLL project that accesses the database, used by both applications. To improve performance, the prices are cached in DLL code to save hitting the database on every request. However, when the administrator changes the prices, the cache is refreshed on the admin application (and obviously it isn't refreshed on the public application) So, to the question. Is it possible to

问题 I know there is a very similar question here but I was hoping to get a better explination. Why would I ever use HttpContext.Cache instead of HttpRuntime.Cache if the HttpContext really uses the HttpRuntime.Cache behind the scenes? In the article Simulate a Windows Service using ASP.NET to run scheduled jobs Omar uses the HttpContext to store his cache items, but when Jeff Atwood Implemented it here he chose to use the HttpRuntime instead. Obviously in this particular situation it makes sense

问题 I know there is a very similar question here but I was hoping to get a better explination. Why would I ever use HttpContext.Cache instead of HttpRuntime.Cache if the HttpContext really uses the HttpRuntime.Cache behind the scenes? In the article Simulate a Windows Service using ASP.NET to run scheduled jobs Omar uses the HttpContext to store his cache items, but when Jeff Atwood Implemented it here he chose to use the HttpRuntime instead. Obviously in this particular situation it makes sense

问题 This is a follow-up to this question, which contains contradictory answers. I am also interested in an answer related to a more recent version of ASP.NET. My application uses HttpRuntime.Cache to cache some lists of models that should never expire. They are loaded on application warmup and they are changed quite rarely, but read quite often. My code is the following: private void ReportRemovedCallback(string key, object value, CacheItemRemovedReason reason) { if (!ApplicationPoolService

问题 I want to store null for some of the keys in HttpRuntime.Cache as I dont want to again go to Database to find that there is no entry for that key. So first time, it goes to database and fills the cache. The intent is to serve the following calls using cached data instead of doing the database call. Here is the code that I am using the following: Info info = null; if (HttpRuntime.Cache["Info_" + id.ToString() + "_" + quantity.ToString()] != null) info = HttpRuntime.Cache["Info_" + id.ToString(

问题 I know that most people recommend using HttpRuntime.Cache because it has more flexibility... etc. But what if you want the object to persist in the cache for the life of the application? Is there any big downside to using the Application[] object to cache things? 回答1: As long as you don't abuse the application state, then I don't see a problem in using it for items that you don't want to expire. Alternatively I would probably use a static variable near the code that uses it. That way you

问题 I'm a beginner in asp.net, and have a few question of Cache: HttpRuntime.Cache only provides severals methods and I think I'm able to implement these methods with Dictionary by myself. If HttpRuntime.Cache is much better than Dictionary, why some people would like to implement their own cache framework. How about MS Enterprise Cache Block? 回答1: HttpRuntime.Cache only provides severals methods and I think I'm able to implement these methods with Dictionary by myself. You think wrong.

问题 Recently, I've been experimenting with caching objects with HttpRuntime.Cache and I was generally under the impression that if I "added" something to the cache like this: HttpRuntime.Cache.Insert("Test", "This is a test!", null, Cache.NoAbsoluteExpiration, Cache.NoSlidingExpiration, CacheItemPriority.NotRemovable, new CacheItemRemovedCallback(FileChanged)); that the "NotRemovable" and "NoExpiration" flags would keep the object in-memory for the duration of the application. But was finding

问题 I am currently storing many different types of objects in the ASP.NET HttpRuntime.Cache and I was wondering if there is a way to figure out how big each object is? 回答1: Look at these questions: Getting the size of a field in bytes with C# Find out the size of a .net object In particular, look for Jon Skeet's answer in those questions. They will tell you why the number won't be accurate. As for getting an estimate, there is no way to do that unless there are certain criteria to be met for your

问题 We have an ASP.NET 4.0 application that draws from a database a complex data structure that takes over 12 hours to push into an in memory data structure (that is later stored in HttpRuntime.Cache). The size of the data structure is quickly increasing and we can't continue waiting 12+ hours to get it into memory if the application restarts. This is a major issue if you want to change the web.config or any code in the web application that causes a restart - it means a long wait before the