访问控制器类中的appsettings.json值

无法弄清楚如何读取startup.cs之外的appsettings.json值。 我想做的是,例如,在_Layout.cshtml中,从配置中添加站点名称:

例如:

ViewData["SiteName"] = Configuration.GetValue("SiteSettings:SiteName"); 

甚至更好:

 public class GlobalVars { public static string SiteName => Configuration.GetValue("SiteSettings:SiteName"); } 

到目前为止,这是我的代码:

[appsettings.json]

 "SiteSettings": { "SiteName": "MySiteName" } 

[startup.cs]

 public Startup(IHostingEnvironment env) { var builder = new ConfigurationBuilder() .SetBasePath(env.ContentRootPath) .AddJsonFile("appsettings.json", optional: true, reloadOnChange: true) .AddJsonFile($"appsettings.{env.EnvironmentName}.json", optional: true) .AddEnvironmentVariables(); Configuration = builder.Build(); var siteName = Configuration.GetValue("SiteSettings:SiteName"); } public IConfigurationRoot Configuration { get; } 

也许我正在阅读文档错误,但我似乎无法在Startup类之外公开Configuration对象。

在你的Startup.cs中

  public void ConfigureServices(IServiceCollection services) { services.AddSingleton(Configuration); } 

然后在你的控制器中:

 public class ValuesController : Controller { IConfiguration configuration; public ValuesController(IConfiguration configuration) { this.configuration = configuration; } }