asp.net core 读取appsettings.json配置项

1.新建一个asp.net core 项目

2.打开appsettings.json，加入配置项

{
  "Logging": {
    "IncludeScopes": false,
    "LogLevel": {
      "Default": "Warning"
    }
  },
  "StarInfo": { //普通方式
    "Port": 3362
  },
  "Job": {
    "Name": "王小二"
  },
  "JobList": [ //集合方式
    {
      "Name": "王小二",
      "Age": 29,
      "sex": "男"
    },
    {
      "Name": "李一一",
      "Age": 22,
      "sex": "女"
    }
  ]
}

3.创建相应的Model

Job.cs

 public class Job
{
     public string Name { get; set; }
}

JobItem.cs

public class JobItem
{
   public string Name { get; set; }
   public int Age { get; set; }
   public string Sex { get; set; }
}

StarInfo.cs

public class StarInfo
{
    public int Port { get; set; }
}

4.在Startup.cs中加入获取项

public void ConfigureServices(IServiceCollection services)
{
     services.AddMvc();
     //读取配置信息
     services.Configure<StarInfo>(this.Configuration.GetSection("StarInfo"));
     //读取配置信息
     services.Configure<Job>(this.Configuration.GetSection("Job"));
     services.Configure<List<JobItem>>(this.Configuration.GetSection("JobList"));
}

5.注入到Controller中

public class HomeController : Controller
    {
        public StarInfo StarInfoConfig;
        public Job JobConfig;
        public List<JobItem> JobListConfig;
        //重写构造函数，包含注入的配置信息
        public HomeController(IOptions<StarInfo> setting, IOptions<Job> jobsetting, IOptions<List<JobItem>> joblistsetting)
        {
            StarInfoConfig = setting.Value;
            JobConfig = jobsetting.Value;
            JobListConfig = joblistsetting.Value;
        }
        public IActionResult Index()
        {
            string portstr = StarInfoConfig.Port.ToString();
            string jobname = JobConfig.Name;
            string liststr = "";
            JobListConfig.ForEach(item =>
            {
                liststr += item.Name + "," + item.Age + "," + item.Sex + "|||||";
            });
            ViewBag.portstr = portstr;
            ViewBag.jobname = jobname;
            ViewBag.liststr = liststr;
            return View();
        }
    }

6.输出结果

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