CODEWITHSUNDEEP
azureasp.net-coreapplication-settingsasp.net-core-2.0azure-web-app-service
serge
serge

Reputation: 15219

Get Azure AppSettings in a Controller

I have an ASP.NET Core 2 application hosted on Azure, and I added a new Application Settings MyNewSetting for my App in the Azure Portal.

How do I access that setting from a controller?

My code bellow: 

public void ConfigureServices(IServiceCollection services)
{
    services.AddOptions();

    services.Configure<AppSecrets>(Configuration);
    services.AddSingleton<ITableRepositories, TableClientOperationsService>();
    //...

My Controller: 

public class RecordController : Controller
{
    const int MyNewSetting = 7; // this one to replace with Azure Setting one
    private readonly ITableRepositories repository;

    public RecordController(ITableRepositories rep) {
        repository = rep;
    }

Here, I need probably to add FromServices injection, but I am not sure if it will work...

EDIT:

Folowing the @dee_zg answer, the following code could probably do the job: 

public class RecordController : Controller
{
    int MyNewSetting = 7;
    private readonly ITableRepositories repository;

    public RecordController(ITableRepositories rep) {
        repository = rep;
        int myInt;
        if (int.TryParse(System.Environment.GetEnvironmentVariable("MY_NEW_SETTING"), 
                         out myInt)) {
            MyNewSetting = myInt;
        };
    }

Upvotes: 1

Views: 355

Answers (2)

rickvdbosch
rickvdbosch

Reputation: 15551

There's quite a few things you can do.

  1. Use Options and configuration objects

    The options pattern uses custom options classes to represent a group of related settings. We recommended that you create decoupled classes for each feature within your app.

  2. Use an IOptionsSnapshot.

    IOptionsSnapshot supports reloading configuration data when the configuration file has changed. It has minimal overhead. Using IOptionsSnapshot with reloadOnChange: true, the options are bound to Configuration and reloaded when changed.

  3. ... (see documentation)

In short, have a look at Configuration in ASP.NET Core, determine the scenario that best fits your needs and have at it!

Hope this helps.

Upvotes: 0

tlt
tlt

Reputation: 15191

You can choose to either get them from AppSettings["your-key"] collection or as environment variables: Environment.GetEnvironmentVariable("your-key").

From there you can map them to your custom IOptions and inject wherever you need them.

Upvotes: 2

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