.Net Core - 从 JSON 文件中获取数组

Question

我需要从 asp.net 核心中的 configuration.json 文件中获取数组。我创建了一个 API 从配置文件中获取一个部分，但我什么也没得到。请帮我找出答案！这是 configuration.json 文件。

"Settings": {
    "Standards": [ "LKG", "UKG", "I", "II", "III", "IV", "V", "VI", "VII", "VIII", "IX", "X", "XI", "XII", "COL" ],
    "PaymentModes": [ "CASH", "DD", "TRANSFER", "RTGS", "NEFT", "CC", "NB" ],
    "FeeTypes": [ "SCHOOL FEE", "HOSTEL FEE", "TRANSPORTATION FEE", "WELCOME PACK FEE", "TOUR FEE", "COACHING FEE", "OTHER FEE" ],
    "Installments": [ "I", "II", "III", "IV", "V", "VI", "VII", "VIII", "IX", "X" ],
    "FinancialInstitutes": ["FEDERAL","ICICI","PAYU","AXIS","AXISRTGS","PAYTM"]
  }

这里是api。

[HttpGet]
    [AllowAnonymous]
    [Route("Settings")]
    public List<string> GetSettings()
    {
        var settings = Configuration.GetSection("Settings").Get<List<string>>();
        return settings;
    }

这里是启动class。

 public class Startup
    {
        private readonly string _contentRootPath;
        public IWebHostEnvironment env;
        public IConfiguration Configuration { get; }
        public Startup(IWebHostEnvironment env)
        {
            _contentRootPath = env.ContentRootPath;

            var builder = new ConfigurationBuilder()
               .SetBasePath(env.ContentRootPath)
               .AddJsonFile("configuration.json", optional: true, reloadOnChange: true)
               .AddJsonFile($"configuration.{env.EnvironmentName}.json", optional: true) 
               .AddEnvironmentVariables();
            this.Configuration = builder.Build();
            this.env = env;
         }
  public void ConfigureServices(IServiceCollection services)
        {
            services.AddSingleton<IConfigurationRoot>(provider => { return (IConfigurationRoot)Configuration; });  services.AddMvc()
            .AddControllersAsServices();
services.AddHttpContextAccessor();
       }
}

Answer 1

首先，尝试创建一个 class 作为您的“设置”部分，例如：

public class Settings 
{
  public List<string> Standards {get; set;}
  public List<string> PaymentModes {get; set;}
  public List<string> FeeTypes {get; set;}
  public List<string> Installments {get; set;}
  public List<string> FinancialInstitutes {get; set;}
}

然后按如下方式更改您的获取方法：

public Settings GetSettings()
{
  var settings = new Settings();
  Configuration.Bind("Settings", settings)
  return settings;
}

Answer 2

我在启动 class 中为配置赋予了单例依赖性，这奏效了。这就是问题所在。我刚刚修改了我的代码，其中首先获取所有键（数组）然后在 foreach 循环中我通过一个一个地获取的键获取数组的值。

public Dictionary<string, List<string>> GetSettings()
    {
        var response = new Dictionary<string, List<string>>();
        var settings = Configuration.GetSection("Settings").GetChildren().Select(x => x.Key).ToList();
        foreach (var setting in settings)
        {
            response.Add(setting, Configuration.GetSection($"Settings:{setting}").Get<List<string>>());
        }
        return response;
    }

.Net Core - 从 JSON 文件中获取数组

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