How to get section from a configuration file

Question

I want to transfer data from appsettings.json to an instance of MailSettings at runtime :

Here's the model :

public class MailSettings
{
    public string Mail { get; set; }
    public string DisplayName { get; set; }
    public string Password { get; set; }
    public string Host { get; set; }
    public int Port { get; set; }
}

In program.cs, I try to configure the service with the following instruction:

    builder.Services.Configure<MailSettings>(Configuration.GetSection("MailSettings"));

But I have the following problem:

Compiler Error CS0120 : An object reference is required for the nonstatic field, method, or property Configuration.GetSection(string)

If someone has a solution ...

https://stackoverflow.com/questions/65933664/how-to-read-section-values-from-appsettings-json-in-net-core/65933846#65933846 — scottdavidwalker, Jun 25 '22 at 10:12

score 2 · Answer 1 · answered Jun 24 '22 at 08:46

2

try this.

builder.Services.Configure<MailSettings>(builder.Configuration.GetSection("MailSettings"));

answered Jun 24 '22 at 08:46

CodingMytra

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Qing Guo · Answer 2 · 2022-06-24T09:06:53.933

1. If you want to get section in program.cs

Try

var settings = builder.Configuration.GetSection("MailSettings").Get<MailSettings>();

Read this answer to know more

Result:

in appsetings.json:

"MailSettings": {
    "Mail": "a@a.com",
    "DisplayName": "aa",
    "Password": "123"
  }

2. If you want to get section in Controller/class

Try

builder.Services.Configure<MailSettings>(builder.Configuration.GetSection("MailSettings"));

HomeController:

 public class HomeController : Controller
    {
        public MailSettings MailSettings { get; }
        public HomeController(IOptions<MailSettings> smtpConfig)
        {
            MailSettings = smtpConfig.Value;
        }
    }

Result:

How to get section from a configuration file

2 Answers2