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  • AbsolutelyN 89 posts 437 karma points
    Oct 22, 2021 @ 12:40
    AbsolutelyN
    0

    How to inject a custom configuration section?

    Hi

    Could anyone clarify how to create and inject your own configuration into a custom service via dependency injection please?

    I'm registering a service and I need some configuration for an api key. I'm registering the service in a composer.

     builder.Services.AddSingleton<IMyService, MyService>();

    Then the service needs some configuration passing into the constructor

     public MyService( IOptions<MyConfig> config)

    Then I have config in appsettings.json

      "MyConfig": {
    "Username": "",
    "Password": "",
    "API": "",
    "Timeout": 6000
  },

    How do you get dependency injection to pass in the config section?

    I'm sure it's really obvious but complete .net core newbie.

    Thanks

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  • AbsolutelyN 89 posts 437 karma points
    Oct 22, 2021 @ 12:55
    AbsolutelyN
    0

    I think I've figured it - missing registering the configuration class.

    builder.Services.Configure<MyConfig>(builder.Config.GetSection("MyConfig"));
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  • Kevin Jump 2348 posts 14896 karma points MVP 8x c-trib
    Oct 22, 2021 @ 12:58
    Kevin Jump
    106

    Hi,

    if you have a class that represents your options.

    eg. 

    public class MyConfigClass {
   public string Username {get;set }
   public string Password {get;set;}
   public string API {get;set;}
   public int TimeOut {get;set;} = 6000; 
}

    You can register your options in a composer 

    var options = builder.Services.AddOptions<MyConfigClass>()
            .Bind(builder.Config.GetSection("MyConfig"));

    "MyConfig" is the name of the section in appsettings.

    then you should be able to inject this as an IOptions<MyConfigClass> into any services/controllers that need to read your settings

    there are other options such as IMontorOptions that mean you don't have to restart to update options. Microsoft docs has a bit more on them,.

    https://docs.microsoft.com/en-us/aspnet/core/fundamentals/configuration/options?view=aspnetcore-5.0

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  • AbsolutelyN 89 posts 437 karma points
    Oct 22, 2021 @ 13:10
    AbsolutelyN
    0

    Thank you Kevin - I did get it working just before you replied but will use your version. Hopefully the thread will help anyone else new to v9 not familiar with this. Much appreciated.

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  • Thomas 319 posts 606 karma points c-trib
    Nov 18, 2021 @ 10:37
    Thomas
    0

    How would yuo access data from the appsettings in razor view?

    Have tried to Inject my custom Settings models but is not working..

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  • Thomas 319 posts 606 karma points c-trib
    Nov 18, 2021 @ 10:52
    Thomas
    1 
    @inject Microsoft.Extensions.Options.IOptions<PlatformSettings> Options
@{
   var _platformSettings = Options.Value;
 }
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