asp.net url 解析json数据 asp.net core json

1. 安装依赖包，由于我是用的是core 2.0 版本，安装的包版本可能和你的有区别
2. 定义实体类以及json文件添加

appsettings.json

{
  "Logging": {
    "LogLevel": {
      "Default": "Warning"
    }
  },
  "test": {
    "name":"123"
  },
  "AllowedHosts": "*"
}

RootConfig类这个类的结构和json文件一样

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;

namespace WebApplication.Config
{
    public class RootConfig
    {
        public Logging Logging { get; set; }

        public string AllowedHosts { get; set; }

        public test test { get; set; }
    }

    public class Logging
    {
        public LogLevel LogLevel { get; set; }
    }

    public class LogLevel
    {
        public string Default { get; set; }
    }

    public class test
    {
        public string name { get; set; }
    }
}

GetConfig类这里只是获取test这一个节点

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.Extensions.Options;

namespace WebApplication.Config
{
    public class GetConfig
    {
        private readonly IOptionsSnapshot<test> _optionsSnapshot;

        public GetConfig(IOptionsSnapshot<test> optionsSnapshot)
        {
            _optionsSnapshot = optionsSnapshot;
        }

        public test getByName()
        {
            return _optionsSnapshot.Value;
        }
    }
}

startup.cs
只是获取test这个节点，要获取整个的json ，只需要将test替换成rootconfig，并删除configurationRoot.GetSection(“test”).Bind(x)
替换成configurationRoot.Bind(x)

services.AddScoped<GetConfig>();

            ConfigurationBuilder configurationBuilder = new ConfigurationBuilder();

            configurationBuilder.AddJsonFile("appsettings.json", optional: false, reloadOnChange: true);


            IConfigurationRoot configurationRoot = configurationBuilder.Build();

            services.AddOptions().Configure<test>(x => configurationRoot.GetSection("test").Bind(x));

            var ss =  services.BuildServiceProvider().GetRequiredService<GetConfig>().getByName();