App.config vs Web.config on web api application

Asked Jul 27 '18 at 14:10

Active Jul 27 '18 at 15:52

Viewed 3,767 times

I'd like my class library (part of our architecture) to have a default app setting for an api path it needs to call, and the client of this dll (our web api) to override this default value, if needed.

I put the key/value in App.config file section AppSettings with the default value (class library), and on the web api I set a new value for this key.

From Web Api, when I read the value (using ConfigurationManager.AppSettings["my_key"]), the value returned is from web.config of web api project. Ok so far. But if I delete this entry from web.config, the call to ConfigurationManager.AppSettings["my_key"]) returns null, that is, the value is not been read from App.config (which contains the default value).

How can I read AppSettings of my dll from web api classes?

Or is there any use for App.Config files on solutions which contain DLLs and web api / web mvc projects?

TIA

I'm using Visual Studio 2015 - .Net Framework 4.5.2 - MVC 5

edited Jul 27 '18 at 15:52

Agnel Amodia

asked Jul 27 '18 at 14:10

Jeova Almeida

Possible duplicate of [Can a class library have an App.config file?](https://stackoverflow.com/questions/4817051/can-a-class-library-have-an-app-config-file) – Liam Jul 27 '18 at 14:11
1

It's not working because class libraies can't have a config file. You need to put all your config into the applications config (in this instance the web.config) – Liam Jul 27 '18 at 14:11
so what's the use for App.config file on a dll project? – Jeova Almeida Jul 27 '18 at 15:30
There isn't one. – Liam Jul 27 '18 at 15:31
Possible duplicate of https://stackoverflow.com/a/52252862/1767482 – Alper Ebicoglu Sep 10 '18 at 08:33

App.config vs Web.config on web api application

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