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

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

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

只需创建一个AnyName.cs文件并粘贴以下代码。

using System;
using System.IO;
using Microsoft.Extensions.Configuration;

namespace Custom
{
    static class ConfigurationManager
    {
        public static IConfiguration AppSetting { get; }
        static ConfigurationManager()
        {
            AppSetting = new ConfigurationBuilder()
                    .SetBasePath(Directory.GetCurrentDirectory())
                    .AddJsonFile("YouAppSettingFile.json")
                    .Build();
        }
    }
}

必须替换YouAppSettingFile。Json文件名与您的文件名。您的.json文件应该如下所示。

{
    "GrandParent_Key" : {
        "Parent_Key" : {
            "Child_Key" : "value1"
        }
    },
    "Parent_Key" : {
        "Child_Key" : "value2"
    },
    "Child_Key" : "value3"
}

现在你可以使用它了。不要忘记在你想要使用的类中添加引用。

using Custom;

检索值的代码。

string value1 = ConfigurationManager.AppSetting["GrandParent_Key:Parent_Key:Child_Key"];
string value2 = ConfigurationManager.AppSetting["Parent_Key:Child_Key"];
string value3 = ConfigurationManager.AppSetting["Child_Key"];

2018-08-10 06:59:42

这里是一个关于。net框架和Core: web的抽象。Config, app.config和appsettings.json

    static SafeDictionary<string, string> _appSettings;

    public static SafeDictionary<string, string> AppSettings {
        get {
            if (_appSettings == null)
            {
                _appSettings = ConfigurationManager.AppSettings
                    .ToDictionary()
                    .ToSafe();

                BuildAppSettings( JsonAppSettings, "");

            }

            return _appSettings;
        }
    }


    static SafeDictionary<string, string> _connectionStrings;

    public static SafeDictionary<string, string> ConnectionStrings
    {
        get
        {
            if (_connectionStrings == null)
            {
                _connectionStrings = ConfigurationManager.ConnectionStrings
                    .Cast<ConnectionStringSettings>()
                    .ToDictionary(x => x.Name, x => x.ConnectionString)
                    .ToSafe();

                foreach (var jp in JsonAppSettings["ConnectionStrings"].Cast<JProperty>())
                    _connectionStrings.Add(jp.Name, jp.Value.ToString() );

            }

            return _connectionStrings;
        }
    }

https://github.com/bitministry/common

2022-09-11 14:42:28

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

我只是创建了一个静态类，并在Startup.cs中设置了一个配置变量

public static class GlobalConfig { 
    public static IConfiguration config { get; set; } 
}

public class Startup
{
    public Startup(IConfiguration configuration)
    {
        GlobalConfig.config = configuration;

    }
}

然后在任何地方使用它:

var keyVal = GlobalConfig.config["key"];

似乎是访问配置文件并使其在任何地方可用的最简单的方法。

2021-12-14 16:42:04

从appsettings获取值。.net core中的Json

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