Application_End未运行

Question

I'm new to C#, so please bear with me.

I have a function that runs in the Application_Start function in the Global.asax.cs file, and this works fine when I start debugging.

But when I stop debugging, the function I have in the Application_End function doesn't seem to fire off. I'm wondering if this has to do with debugging, or is just an error in my code.

Answer 1

I guess the application never ended. While you are debugging (using Cassandra or IIS Express) or running an installation on IIS itself the application doesn't end when your debugging session ends.

On IIS it ends when the worker process stops. This happens automatically after some time, depending on your application pool settings.

In Cassandra and IIS Express it will happen when the process ends gracefully . I wonder if they get ever called on a regular basis on those installations.

Answer 2

Its in general not a good idea to put a lot of code in Application_End that you need to rely on firing. Consider that an ApplicationInstance is started to each thread of the work process that will be serving your application, you will run into scenarios where your Application_End will be called frequently on a busy site as traffic ebbs and flows.

You may find it easier to use a Cache object with a sliding expiration and a callback function when the object expires from Cache to ensure that your clean up code is called properly when you need it.

http://msdn.microsoft.com/en-us/library/05kd8d77(v=vs.110).aspx

Answer 3

I had a similar issue where Application_End was not called because there were threads running when the application was asked to stop, and because this method is only called after everything has stopped fine.

Then, I discovered Application_Disposed . From http://www.techrepublic.com/article/working-with-the-aspnet-globalasax-file/5771721/ :

Application_Disposed: Fired just before an application is destroyed. This is the ideal location for cleaning up previously used resources.