.NetCore中获取appsettings.json中的节点数据

获取ConnectionStrings节点数据

//appsettings.json
{

"ConnectionStrings": {

//DEV

"DbConn": "Server=**;Integrated Security=no;User ID=**;PWD=**;initial catalog=DB**;MultipleActiveResultSets=true;Max Pool Size=1024;Min Pool Size=10;Pooling=true;"

//QA

//PROD

},

"ErrorPage": "/Error/Error",

"Environment": "DEV"

}

//startup.cs


public Startup(IConfiguration configuration) //依赖注入

{

_cOnfiguration= configuration;

}
public IConfiguration _configuration { get; }
// This method gets called by the runtime. Use this method to add services to the container.

public void ConfigureServices(IServiceCollection services)

{

string _conn;

//config db

try

{
//GetSection("Environment")获取Environment节点的数据

if (_configuration.GetSection("Environment").Value.Equals("PROD", StringComparison.OrdinalIgnoreCase))

{

var service = new DecryptService("ProjectICE_Portal");

_cOnn= service.Decrypt(_configuration.GetConnectionString("DbConn"));//加密获取节点数据

}

else

{

_cOnn= _configuration.GetConnectionString("DbConn");//非加密

}

}

catch (Exception ex)

{

throw new Exception($"Database connection initialization failed: {ex.Message}{ex.StackTrace}");

}

}

第二种比较实用的方法

//Appsettings.json

{

"Logging": {

"LogLevel": {

"Default": "Information",

"Microsoft": "Warning"

}

},

"AllowedHosts": "*",

"student": {

"name": "小明",

"age": 17,

"classname": "5班"
}

}
//新建一个实体类 实体类的属性和配置文件的配置项一致

public class student

{

public string name { get; set; }

public int age { get; set; }

// public string classname { get; set; }

}
//Startup.cs
//services.AddOptions(); 这两个必须在AddMvc上面

services.Configure(Configuration.GetSection("student"));

services.AddMvc();


//Controller 依赖注入 using Microsoft.Extensions.Options;

public class OneController : Controller

{

private readonly IOptions _log;

public OneController(IOptions logs)

{

_log = logs;

}

public IActionResult Index()

{

var a = _log.Value;

ViewBag.a = a.name; //"小明"

return View();

}

}

.Net Core中获取appsettings.json中的节点数据的相关教程结束。