"IConfiguration"不包含"Get"的定义 [英] 'IConfiguration' does not contain a definition for 'Get'

问题描述

最初，我在1.0.0-rc1-beta6中有代码.

 公共静态IConfiguration配置{get;放;}公共启动(IHostingEnvironment env，IApplicationEnvironment appEnv){//设置配置源.var builder = new ConfigurationBuilder(appEnv.ApplicationBasePath).AddJsonFile("config.json").AddEnvironmentVariables();配置= builder.Build();var test = Configuration.Get("ASPNET_ENV");} 

现在我要使用1.0.0-rc1-update，代码是:

 公共启动(IHostingEnvironment env，IApplicationEnvironment appEnv){//设置配置源.var builder = new ConfigurationBuilder().SetBasePath(appEnv.ApplicationBasePath).AddJsonFile("config.json").AddEnvironmentVariables();配置= builder.Build();var test = Configuration.Get("ASPNET_ENV");} 

"ASP.NET_ENV"；来自launchSettings.json文件.

 "profiles":{"IIS Express":{" commandName" ;:" IISExpress" ;，"launchBrowser":是的，"environmentVariables":{"ASPNET_ENV":开发"}，"sdkVersion":"dnx-clr-win-x64.1.0.0-beta6".}， 

但是我仍然在最后一行收到错误消息.

'IConfiguration'不包含'Get'的定义，最佳扩展方法重载'SessionExtensions.Get(ISession，string)'需要类型为'ISession'的接收器.

也在这里得到错误.

 公共无效的ConfigureServices(IServiceCollection服务){//将MVC服务添加到服务容器.services.AddMvc();//错误} 

我的project.json文件

 <代码> {"webroot":"wwwroot"，版本":"1.0.0- *"，依赖项":{"Microsoft.AspNet.Diagnostics":"1.0.0-rc1-final"，"Microsoft.AspNet.Mvc":"6.0.0-rc1-final"，"Microsoft.AspNet.Mvc.TagHelpers":"6.0.0-rc1-final"，"Microsoft.AspNet.Server.IIS":"1.0.0-beta7"，"Microsoft.AspNet.Server.WebListener":"1.0.0-rc1-final"，"Microsoft.AspNet.StaticFiles":"1.0.0-rc1-final"，"Microsoft.AspNet.Tooling.Razor":"1.0.0-rc1-final"，"Microsoft.Framework.Configuration.Json":"1.0.0-beta8"，"Microsoft.Framework.Logging":"1.0.0-beta8"，"Microsoft.Framework.Logging.Console":"1.0.0-beta8"，"Microsoft.VisualStudio.Web.BrowserLink.Loader":"14.0.0-rc1-final"，"EntityFramework":"6.1.3"，"jqGridWebApi":"1.1.4"，"EnyimMemcached":"2.13.0"，"xunit":"2.2.0-beta1-build3239"，"Moq":"4.2.1510.2205"，"NLog":"2.1.0&"，"CryptSharpOfficial":"2.1.0&"，"System.Linq.Dynamic":"1.0.4"；"System.Linq.Dynamic":"1.0.4"}，命令":{"web":"Microsoft.AspNet.Hosting --server Microsoft.AspNet.Server.WebListener --server.urls http://localhost:5001"，"kestrel":"Microsoft.AspNet.Hosting --server Kestrel --server.urls http://localhost:5005"}，框架":{"dnx451":{"frameworkAssemblies":{"System.configuration":"4.0.0.0"，"System.Data":"4.0.0.0"；}}}，排除":["wwwroot"，"node_modules"，"bower_components"]，"publishExclude":["node_modules"，"bower_components"，"**.xproj"，"**.user"，"**.vspscc"]，脚本":{预发布":["npm install"，"bower安装"，"gulp clean"，"gulp min".]}，配置":{登台":{}}} 

解决方案

安装NuGet软件包:

Microsoft.Extensions.Configuration.Binder

重复:

Originally, I had the code in 1.0.0-rc1-beta6.

 public static IConfiguration Configuration { get; set; }

 public Startup(IHostingEnvironment env, IApplicationEnvironment appEnv)
    {
        // Setup configuration sources.
        var builder = new ConfigurationBuilder(appEnv.ApplicationBasePath)
            .AddJsonFile("config.json")
            .AddEnvironmentVariables();
        Configuration = builder.Build();
        var test = Configuration.Get("ASPNET_ENV");
    }

Now I want to use 1.0.0-rc1-update, the code is:

 public Startup(IHostingEnvironment env, IApplicationEnvironment appEnv)
    {
        // Setup configuration sources.
        var builder = new ConfigurationBuilder()
            .SetBasePath(appEnv.ApplicationBasePath)
            .AddJsonFile("config.json")
            .AddEnvironmentVariables();
        Configuration = builder.Build();
        var test = Configuration.Get("ASPNET_ENV");
    }

"ASP.NET_ENV" is from launchSettings.json file.

"profiles": {
"IIS Express": {
  "commandName": "IISExpress",
  "launchBrowser": true,
  "environmentVariables": {
    "ASPNET_ENV": "Development"
  },
  "sdkVersion": "dnx-clr-win-x64.1.0.0-beta6"
},

But I still get the error on the last line.

'IConfiguration' does not contain a definition for 'Get' and the best extension method overload 'SessionExtensions.Get(ISession, string)' requires a receiver of type 'ISession'.

Also get the error here.

   public void ConfigureServices(IServiceCollection services)
    {
        // Add MVC services to the services container.
        services.AddMvc(); //error
    }

My project.json file

    {
  "webroot": "wwwroot",
  "version": "1.0.0-*",
  "dependencies": {
    "Microsoft.AspNet.Diagnostics": "1.0.0-rc1-final",
    "Microsoft.AspNet.Mvc": "6.0.0-rc1-final",
    "Microsoft.AspNet.Mvc.TagHelpers": "6.0.0-rc1-final",
    "Microsoft.AspNet.Server.IIS": "1.0.0-beta7",
    "Microsoft.AspNet.Server.WebListener": "1.0.0-rc1-final",
    "Microsoft.AspNet.StaticFiles": "1.0.0-rc1-final",
    "Microsoft.AspNet.Tooling.Razor": "1.0.0-rc1-final",
    "Microsoft.Framework.Configuration.Json": "1.0.0-beta8",
    "Microsoft.Framework.Logging": "1.0.0-beta8",
    "Microsoft.Framework.Logging.Console": "1.0.0-beta8",
    "Microsoft.VisualStudio.Web.BrowserLink.Loader": "14.0.0-rc1-final",
    "EntityFramework": "6.1.3",
    "jqGridWebApi": "1.1.4",
    "EnyimMemcached": "2.13.0",
    "xunit": "2.2.0-beta1-build3239",
    "Moq": "4.2.1510.2205",
    "NLog": "2.1.0",
    "CryptSharpOfficial": "2.1.0",
    "System.Linq.Dynamic": "1.0.4"
  },
  "commands": {
    "web": "Microsoft.AspNet.Hosting --server Microsoft.AspNet.Server.WebListener --server.urls http://localhost:5001",
    "kestrel": "Microsoft.AspNet.Hosting --server Kestrel --server.urls http://localhost:5005"
  },
  "frameworks": {
    "dnx451": {
      "frameworkAssemblies": {
        "System.configuration": "4.0.0.0",
        "System.Data": "4.0.0.0"
      }
    }
  },
  "exclude": [
    "wwwroot",
    "node_modules",
    "bower_components"
  ],
  "publishExclude": [
    "node_modules",
    "bower_components",
    "**.xproj",
    "**.user",
    "**.vspscc"
  ],
  "scripts": {
    "prepublish": [ "npm install", "bower install", "gulp clean", "gulp min" ]
  },
  "configurations": {
    "Staging": { }
  }
}

解决方案

Install the NuGet package:

Microsoft.Extensions.Configuration.Binder

Duplicate: Bind a IConfigurationSection to an complex object without aspnetcore

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