如何覆盖 appsettings.json 或 appsettings。<envrionment> .json 文件以编程方式使用 .net 核心 web api 和 C#？</envrionment>

Question

Current problem with a scenario: Our application code was deployed in dev environment with dev api service (Third party api service: DEV). Now, due to maintainence this third party service is down in dev environment and our testing is blocked. So architect decided point to QA and redeploy the code into DEV environment.

Until we push the changes into DEV team has to wait for testing.

To avoid this situation, what we are looking here is,

Read these file(s): appsettings.json or appsetting.<environment>.json and loaded in UI with editable way. When there is a change required like above scenario, we change and update our appsettings.json or appsetting.<environment>.json files.

This way we save our time to redploy this file with new changes.

But our question here is, all our data from appsettings.json or appsetting.<environment>.json these file(s) loaded during startup. Later, we update and loaded the file in environment but how these values are going to read it through any of the service in code?

Hope you are getting my scenario and expecting your valuable suggestions

Answer 1

If I understood your request, you will need to use a design pattern, such as wrapper .

Create a singleton service that holds all settings in properties. Do not use IConfiguration directly anywhere in the services, instead switch to the wrapper. Thanks to this you can control the source of settings, and overwrite the settings by overwriting properties in the wrapper. You don't have to modify source files and reload the entire application, thanks to this solution.

Also remember about proper caching and encapsulation - if you're caching the values somewhere, make sure you have that in mind.