C#•2y ago

Properties of IConfigurationSection.Get are null?

I have a very simple test case set up using Microsoft.Extensions.Configuration and Microsoft.Extensions.Configuration.Binder. The config (aopsettings.json):

{
  "Foo": "bar"
}

{
  "Foo": "bar"
}

And the class:

public class Configuration
{
    public string Foo;
}

public class Configuration
{
    public string Foo;
}

The configuration builds correctly. I can see it contains the Foo property when debugging. However, when I try to use var test = _configuration.Get<Configuration>(), the Foo property of test is null. I'm confused what is going wrong here. Can anyone spot the mistake?

5 Replies

Tinefol•2y ago

@mixels your Foo is not actually a property, rather a field. Perhaps try adding {get; set;} to it?

Cracker•2y ago

JSON data should contain class name as well. Foo under Configuration section

mixelsOP•2y ago

Configuration is the root though isn't it? Ok I will try that, thanks for the suggestion

Pobiega•2y ago

it MUST be properties and it MUST have a public setter

mixelsOP•2y ago

Thanks that did the trick. Got so used to Newtonsoft.Json that I never even suspected it required properties.

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Properties of IConfigurationSection.Get are null?