I'm trying to make an endpoint to return a JSON response. I've tried narrowing it down to just the object and all I receive is {} or [{}] as a response. After debugging I confirmed that the object was being created correctly but when returning the response it was always blank. Below is simplified code but still has the same issue. Any ideas what I'm doing wrong?

[Route("{application}")]
[HttpGet]
public IActionResult Get(string application)
{
    List<RequestedSetting> requestedSettings = new List<RequestedSetting>();
    RequestedSetting rs = new RequestedSetting("foo", "bar");
    requestedSettings.Add(rs);
    return Json(requestedSettings);
}

public class RequestedSetting
{

    public string Name;
    public string Value;

    public RequestedSetting(string name, string value)
    {
        Name = name;
        Value = value;
    }
}

I've also tried this:

[Route("{application}")]
[HttpGet]
public List<RequestedSetting> Get(string application)
{
    List<RequestedSetting> requestedSettings = new List<RequestedSetting>();
    RequestedSetting rs = new RequestedSetting("foo", "bar");
    requestedSettings.Add(rs);
    return requestedSettings;
}

CodePudding user response：

Fields are not supported for serialisation in System.Text.Json. see the docs for more info.

Instead, change your class to use properties:

public class RequestedSetting
{

    public string Name { get; set; }
    public string Value { get; set; }

    public RequestedSetting(string name, string value)
    {
        Name = name;
        Value = value;
    }
}