CODEWITHSUNDEEP
c#asp.net-core.net-coreasp.net-core-2.0
eftpotrm
eftpotrm

Reputation: 2281

Unable to read data afrom appsettings.json

I'm sure I've got something basic wrong but I can't spot it, sorry. Stepping into the startup code suggests the appsettings.json is being correctly loaded, but the test class then gets null for the config class.

Startup:

public class Startup
{
    public Startup(IConfiguration configuration)
    {
        var builder = new ConfigurationBuilder().AddJsonFile("appSettings.json");
        Configuration = builder.Build();
    }

    public IConfiguration Configuration { get; set; }

    public void ConfigureServices(IServiceCollection services)
    {
        services.AddMvc().AddSessionStateTempDataProvider();
        services.AddSession();

        services.Configure<EnvironmentConfig>(Configuration.GetSection("EnvironmentConfig"));
    }
}

ConfigTester:

public class ConfigTester
{
    private readonly IOptions<EnvironmentConfig> _environmentConfig;

    public ConfigTester(IOptions<EnvironmentConfig> environmentConfig)
    {
        _environmentConfig = environmentConfig;
    }

    public string ConfigName()
    {
        return _environmentConfig.Value.Name;         //_environmentConfig.Value is set, but Name is null
    }
}

EnvironmentConfig:

public class EnvironmentConfig
{
    public string Name;

}

appSettings.json:

{
  "Logging": {
    "IncludeScopes": false,
    "Debug": {
      "LogLevel": {
        "Default": "Warning"
      }
    },
    "Console": {
      "LogLevel": {
        "Default": "Warning"
      }
    }
  },
  "EnvironmentConfig": {
    "Name": "develop"
  }
}

What have I missed?

Upvotes: 1

Views: 206

Answers (2)

Kirk Larkin
Kirk Larkin

Reputation: 93253

When using IServiceCollection.Configure, the ConfigurationBinder class that ends up doing the work of binding the values in your appSettings.json file to your EnvironmentConfig class only binds against properties. That means all you have to do is change your public field to a public property:

public class EnvironmentConfig
{
    public string Name { get; set; }
}

Upvotes: 1

jyothi530
jyothi530

Reputation: 21

Add the following line in your ConfigureServices method before you configure your Options using serives.Configure<T>(). To use the Options feature you have to enable it.

services.AddOptions();

Upvotes: 2

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