C#•3y 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"
}

{
  "Foo": "bar"
}

{
  "Foo": "bar"
}

And the class:

public class Configuration
{
    public string Foo;
}

public class Configuration
{
    public string Foo;
}

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>()

var test = _configuration.Get<Configuration>()

var test = _configuration.Get<Configuration>()

var test = _configuration.Get<Configuration>(), the Foo property of

test

test

test

test is null.

I'm confused what is going wrong here. Can anyone spot the mistake?

Tinefol•6/5/23, 5:31 PM

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

Cracker•6/5/23, 5:33 PM

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

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

TrenycOP•6/5/23, 5:39 PM

Configuration is the root though isn't it?

TTinefol @mixels your Foo is not actually a property, rather a field. Perhaps try adding ...

TrenycOP•6/5/23, 5:39 PM

Ok I will try that, thanks for the suggestion

Pobiega•6/5/23, 6:25 PM

it MUST be properties and it MUST have a public setter

TTinefol @mixels your Foo is not actually a property, rather a field. Perhaps try adding ...

TrenycOP•6/5/23, 6:39 PM

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

Properties of IConfigurationSection.Get are null?

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