从appsettings获取值。.net core中的Json

不确定我在这里错过了什么，但我无法从我的应用程序设置中获得值。Json在我的。net核心应用程序。我有我的appsettings。json:

{
    "AppSettings": {
        "Version": "One"
    }
}

启动:

public class Startup
{
    private IConfigurationRoot _configuration;
    public Startup(IHostingEnvironment env)
    {
        _configuration = new ConfigurationBuilder()
    }
    public void ConfigureServices(IServiceCollection services)
    {
      //Here I setup to read appsettings        
      services.Configure<AppSettings>(_configuration.GetSection("AppSettings"));
    }
}

模型:

public class AppSettings
{
    public string Version{ get; set; }
}

控制器:

public class HomeController : Controller
{
    private readonly AppSettings _mySettings;

    public HomeController(IOptions<AppSettings> settings)
    {
        //This is always null
        _mySettings = settings.Value;
    }
}

_mySettings总是空的。我是不是遗漏了什么?

当前回答

在我的例子中，它就像在Configuration对象上使用Bind()方法一样简单。然后将对象作为单例添加到DI中。

var instructionSettings = new InstructionSettings();
Configuration.Bind("InstructionSettings", instructionSettings);
services.AddSingleton(typeof(IInstructionSettings), (serviceProvider) => instructionSettings);

Instruction对象可以非常复杂。

{  
 "InstructionSettings": {
    "Header": "uat_TEST",
    "SVSCode": "FICA",
    "CallBackUrl": "https://UATEnviro.companyName.co.za/suite/webapi/receiveCallback",
    "Username": "s_integrat",
    "Password": "X@nkmail6",
    "Defaults": {
    "Language": "ENG",
    "ContactDetails":{
       "StreetNumber": "9",
       "StreetName": "Nano Drive",
       "City": "Johannesburg",
       "Suburb": "Sandton",
       "Province": "Gauteng",
       "PostCode": "2196",
       "Email": "ourDefaultEmail@companyName.co.za",
       "CellNumber": "0833 468 378",
       "HomeNumber": "0833 468 378",
      }
      "CountryOfBirth": "710"
    }
  }

2018-11-07 08:01:06

其他回答

我想最简单的方法就是DI。一个进入控制器的例子。

// StartUp.cs
public void ConfigureServices(IServiceCollection services)
{
    ...
    // for get appsettings from anywhere
    services.AddSingleton(Configuration);
}

public class ContactUsController : Controller
{
    readonly IConfiguration _configuration;

    public ContactUsController(
        IConfiguration configuration)
    {
        _configuration = configuration;

        // sample:
        var apiKey = _configuration.GetValue<string>("SendGrid:CAAO");
        ...
    }
}

2018-10-26 16:02:49

我在WPF中遇到了类似的问题。NET Framework 5.0)

我所要做的就是登记。

services.AddSingleton<IConfiguration>(_configuration);

配置本身是这样配置的(在App.xaml.cs中):

var builder = new ConfigurationBuilder()
    .SetBasePath(Directory.GetCurrentDirectory())
    .AddJsonFile("appsettings.json", optional: false, reloadOnChange: true);

_configuration = builder.Build();

2021-11-09 10:47:50

假设在appsettings.json中有这样的值。

  "MyValues": {
    "Value1": "Xyz"
  }

方法一:不进行依赖注入

在.cs文件中:

static IConfiguration conf = (new ConfigurationBuilder().SetBasePath(Directory.GetCurrentDirectory()).AddJsonFile("appsettings.json").Build());
public static string myValue1= conf["MyValues:Value1"].ToString();

方法二:依赖注入(推荐)

在Startup.cs文件:

public IConfiguration Configuration { get; }
public Startup(IConfiguration configuration)
{
     Configuration = configuration;
}
public void ConfigureServices(IServiceCollection services)
{
     ...
     services.AddServices(Configuration);
}

在你的控制器中:

public class TestController : ControllerBase
{
    private string myValue1 { get; set; }
    public TestController(IConfiguration configuration)
    {
         this.myValue1 = configuration.GetValue<string>("MyValues:Value1");
    }
}

2020-07-22 16:17:08

亚比谢克的回答是:

如果你想将值导入到静态类中，那么只需使用(ReSharper推荐):

static IConfiguration conf = (JsonConfigurationExtensions.AddJsonFile(new ConfigurationBuilder().SetBasePath(Directory.GetCurrentDirectory()), "appsettings.json").Build());

private static string AuthorizationServiceURL { get; } = conf["ServiceUrls:AuthorizationUrl"];

// appsettings.json
{
  "ServiceUrls": {
    "AuthorizationUrl": "https://example.com/authorize"
  } 
}

2022-01-05 08:34:15

在Startup类的构造函数中，可以访问appsettings。json和使用注入的IConfiguration对象的许多其他设置:

Startup.cs构造函数

    public Startup(IConfiguration configuration)
    {
        Configuration = configuration;

        //here you go
        var myvalue = Configuration["Grandfather:Father:Child"];

    }

public IConfiguration Configuration { get; }

json的内容

  {
  "Grandfather": {
    "Father": {
      "Child": "myvalue"
    }
  }

2019-01-06 10:22:47

从appsettings获取值。.net core中的Json

推荐文章

最新文章

标签