.NET Core 讀取appsettings.json

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{  "Logging": {    "IncludeScopes": false,    "LogLevel": {      "Default": "Warning"    }  },  "AppSettings": {    "SqlServerConnection": "Server=127.0.0.1;Database=demo;User ID=sa;Password=sa;",    "RedisCaching": {      "Enabled": true,      "ConnectionString": "127.0.0.1:6379"    }  }}

 

1、初始化注入方式

　　Startup.cs下ConfigureServices方法：

services.AddOptions();services.Configure<AppSettings>(Configuration.GetSection("AppSettings"));

public class AppSettings{      public RedisCaching RedisCaching { get; set; }}public class RedisCaching{     /// <summary>     /// 是否啟用     /// </summary>     public bool Enabled { get; set; }     /// <summary>     /// 連結資訊     /// </summary>     public string ConnectionString { get; set; }}

然後在控制器中調用：

public readonly IOptions<AppSettings> Setting;public HomeController(IOptions<AppSettings> setting){    Setting = setting;}public IActionResult Index(){    var s = Setting.Value.RedisCaching.ConnectionString;    ViewData["abc"] = s;    return View();}

2、讀取appsettings.json方式 (此方法如在單獨的類庫中需引用Microsoft.Extensions.Options.ConfigurationExtensions)

　　1)先設定appsettings.json檔案複製到根目錄.右鍵appsettings.json 進階 複製到輸出目錄中選“始終複製”.

　　　　

　　2）

　　　　 public T Get<T>(string key)        {            IConfiguration config = new ConfigurationBuilder().SetBasePath(Directory.GetCurrentDirectory())                .AddJsonFile("appsettings.json", true, true).Build();           return config.GetSection(key).Get<T>();        }

　　　　 public IActionResult Index()        {            var s = new GetAppSetting().Get<string>("AppSettings:SqlServerConnection");             ViewData["abc"] = s;            return View();        }

 

第一種方法在別的類庫中也可調用，比較方便，剛做core項目，用第一種方法時類庫中不好調用，查了半天用第二種就可以了。

.NET Core 讀取appsettings.json