Shut down issue in ASP .NET application

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Hi team,

I am working on aso .Net web application. I have to send email notification in the fallowing scenarios.
1)whenever my application will get crashes.
2)I am using 3rd party services So whenever 3rd party service down/crash then I have to send mail.
3)whenever Database down.

In above scenarios I have to send email notification.

Note: I have implement this code in Applivation_End event but this event not getting fired.

Please help me how to resolve this problem.

Thanks,
Jayaram

What I have tried:

I have implement this code in Applivation_End event but this event not fired.

Posted 16-Feb-19 9:36am

Hi,jayaram

Updated 17-Feb-19 22:01pm

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Afzaal Ahmad Zeeshan 16-Feb-19 15:44pm

And so this event is not being hit?

I recommend against this approach, catch the error as it is raised and log it (or send an email from there), do not wait until everything collapses.

Kornfeld Eliyahu Peter 17-Feb-19 9:41am

This means (except of the application crash) that you have to poll constantly the DB and 3rd party services to see if they are well and alive...
It is a very time/resource consuming thing to do, and basically goes against the disconnected nature of the web... You must have to have a very serious reason to do this, otherwise just go with exception handling...

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OriginalGriff · Answer 1 · 2019-02-17T22:01:00

The Application_End event only ever gets fired when the IIS pool is restarted (or a couple of other less relevant cases), not when your web page crashes due to unavailable DB or whatever. In a web app, the app is running while any user is connected and using it, and it doesn't get shutdown for a single user's problem.

Your best approach is to pepper your website with try...catch blocks and use those to send your emails. The only other approach is to have a separate app that polls the DB and service at frequent intervals - and that's a bad idea unless this is a safety critical system (and even then, you probably want to handle things rather better in terms of design than your question implies you have!)