How to extract a list from appsettings.json in .net core

Question

I have an appsettings.json file which looks like this:

{
    "someSetting": {
        "subSettings": [
            "one",
            "two",
            "three"
         ]
    }
}

When I build my configuration root, and do something like config["someSetting:subSettings"] it returns null and the actual settings available are something like this:

config["someSettings:subSettings:0"]

Is there a better way of retrieving the contents of someSettings:subSettings as a list?

Answer 1

Assuming your appsettings.json looks like this:

{
  "foo": {
    "bar": [
      "1",
      "2",
      "3"
    ]
  }
}

You can extract the list items like so:

Configuration.GetSection("foo:bar").Get<List<string>>()