ASP。使用IConfiguration获取Json数组

在appsettings.json

{
      "MyArray": [
          "str1",
          "str2",
          "str3"
      ]
}

在Startup.cs

public void ConfigureServices(IServiceCollection services)
{
     services.AddSingleton<IConfiguration>(Configuration);
}

在HomeController

public class HomeController : Controller
{
    private readonly IConfiguration _config;
    public HomeController(IConfiguration config)
    {
        this._config = config;
    }
    
    public IActionResult Index()
    {
        return Json(_config.GetSection("MyArray"));
    }
}

上面是我的代码。结果是零。如何获取数组?

当前回答

如果你有一个像这样的复杂JSON对象数组:

{
  "MySettings": {
    "MyValues": [
      { "Key": "Key1", "Value":  "Value1" },
      { "Key": "Key2", "Value":  "Value2" }
    ]
  }
}

你可以这样检索设置:

var valuesSection = configuration.GetSection("MySettings:MyValues");
foreach (IConfigurationSection section in valuesSection.GetChildren())
{
    var key = section.GetValue<string>("Key");
    var value = section.GetValue<string>("Value");
}

2017-06-06 14:21:08

其他回答

您可以安装以下两个NuGet包:

using Microsoft.Extensions.Configuration; 
using Microsoft.Extensions.Configuration.Binder;

然后你将有可能使用以下扩展方法:

var myArray = _config.GetSection("MyArray").Get<string[]>();

2017-10-03 09:48:05

你可以直接获得数组，而不需要在配置中增加一个新的级别:

public void ConfigureServices(IServiceCollection services) {
    services.Configure<List<String>>(Configuration.GetSection("MyArray"));
    //...
}

2017-08-04 10:53:35

如果你有一个像这样的复杂JSON对象数组:

{
  "MySettings": {
    "MyValues": [
      { "Key": "Key1", "Value":  "Value1" },
      { "Key": "Key2", "Value":  "Value2" }
    ]
  }
}

你可以这样检索设置:

var valuesSection = configuration.GetSection("MySettings:MyValues");
foreach (IConfigurationSection section in valuesSection.GetChildren())
{
    var key = section.GetValue<string>("Key");
    var value = section.GetValue<string>("Value");
}

2017-06-06 14:21:08

设置。json文件:

{
    "AppSetting": {
        "ProfileDirectory": "C:/Users/",
        "Database": {
            "Port": 7002
        },
        "Backend": {
            "RunAsAdmin": true,
            "InstallAsService": true,
            "Urls": [
                "http://127.0.0.1:8000"
            ],
            "Port": 8000,
            "ServiceName": "xxxxx"
        }
    }
}

code

代码:

public static IConfigurationRoot GetConfigurationFromArgs(string[] args, string cfgDir)
{
    var builder = new ConfigurationBuilder()
            .SetBasePath(cfgDir)
            .AddCommandLine(args ?? new string[0]) // null  in UnitTest null will cause exception
            .AddJsonFile(Path.Combine(cfgDir, "setting.json"), optional: true, reloadOnChange: true)
            .AddEnvironmentVariables()
        // .AddInMemoryollection(configDictionary)
        ;
    var config = builder.Build();
    return config;
}

你可以使用services.AddOptions<AppSettingOption>("AppSetting")或者直接从iconfigationroot对象获取Object。

var cfg = GetConfigurationFromArgs(args, appDataDirectory);
cfg.GetSection("AppSetting").Get<AppSettingOption>()

输出:

{App.AppSettingOption}
    Backend: {App.BackendOption}
    Database: {App.DatabaseOption}
    ProfileDirectory: "C:/Users/"

2021-09-20 11:13:18

在应用程序设置中添加一个级别。json:

{
  "MySettings": {
    "MyArray": [
      "str1",
      "str2",
      "str3"
    ]
  }
}

创建一个代表你的section的类:

public class MySettings
{
     public List<string> MyArray {get; set;}
}

在你的应用启动类中，绑定你的模型并将其注入到DI服务中:

services.Configure<MySettings>(options => Configuration.GetSection("MySettings").Bind(options));

在你的控制器中，从DI服务中获取配置数据:

public class HomeController : Controller
{
    private readonly List<string> _myArray;

    public HomeController(IOptions<MySettings> mySettings)
    {
        _myArray = mySettings.Value.MyArray;
    }

    public IActionResult Index()
    {
        return Json(_myArray);
    }
}

你也可以把你的整个配置模型存储在控制器的属性中，如果你需要所有的数据:

public class HomeController : Controller
{
    private readonly MySettings _mySettings;

    public HomeController(IOptions<MySettings> mySettings)
    {
        _mySettings = mySettings.Value;
    }

    public IActionResult Index()
    {
        return Json(_mySettings.MyArray);
    }
}

ASP。NET Core的依赖注入服务就像一个魔法一样:)

2016-12-26 12:34:50

ASP。使用IConfiguration获取Json数组

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