在appsettings.json

{
      "MyArray": [
          "str1",
          "str2",
          "str3"
      ]
}

---

在Startup.cs

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

---

在HomeController

public class HomeController : Controller
{
    private readonly IConfiguration _config;
    public HomeController(IConfiguration config)
    {
        this._config = config;
    }
    
    public IActionResult Index()
    {
        return Json(_config.GetSection("MyArray"));
    }
}

上面是我的代码。结果是零。 如何获取数组?

我是新的EF核心，我试图让它与我的ASP工作。NET Core项目。

当我尝试配置DbContext使用config中的连接字符串时，我在startup.cs中得到了上述错误。我正在遵循这个教程。

有问题的代码在startup.cs中:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.SpaServices.Webpack;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Logging;
using Microsoft.EntityFrameworkCore;
using tracV2.models;
using tracV2.data;

namespace tracV2
{
    public class Startup
    {
        // This method gets called by the runtime. Use this method to add services to the container.
        public void ConfigureServices(IServiceCollection services)
        {
            // Add framework services.
            services.AddMvc();

            services.AddSingleton<IConfiguration>(Configuration);

            string conn = Configuration.GetConnectionString("optimumDB");

            services.AddDbContext<tracContext>(options => options.usesqlserver(conn));
        }

如果我把UseSqlServer方法直接放到上下文中，它就会被识别出来:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.EntityFrameworkCore;

namespace tracV2.data
{
    public class tracContext : DbContext
    {
        protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
        {
            optionsBuilder.UseSqlServer("myrealconnectionstring");
        }

我在网上的所有研究都指向了缺失的参考文献，但我似乎找不到我缺失的是哪一本(见图)。

我有一个ASP。NET核心项目，我得到这个错误时，我试图构建它:

error TS18003: Build:No inputs were found in config file 'Z:/Projects/client/ZV/src/ZV/Scripts/tsconfig.json'. Specified 'include' paths were '["**/*"]' and 'exclude' paths were '["../wwwroot/app","node_modules/*"]'.
1>         The command exited with code 1.
1>       Done executing task "VsTsc" -- FAILED.

这是我的tsconfig。json文件:

{
  "compileOnSave": true,
  "compilerOptions": {
    "emitDecoratorMetadata": true,
    "experimentalDecorators": true,
    "lib": [ "es5", "dom" ],
    "module": "commonjs",
    "moduleResolution": "node",
    "noEmitOnError": true,
    "noImplicitAny": false,
    "outDir": "../wwwroot/app/",
    "removeComments": false,
    "sourceMap": true,
    "target": "es6"
  },
  "exclude": [
    "../wwwroot/app",
    "node_modules/*"
  ]
}

这是bug还是我做错了什么?我最近把Visual Studio 2015升级到3。有人以前遇到过这种情况吗?

我做错了什么?

import {bootstrap, Component} from 'angular2/angular2'

@Component({
  selector: 'conf-talks',
  template: `<div *ngFor="talk of talks">
     {{talk.title}} by {{talk.speaker}}
     <p>{{talk.description}}
   </div>`
})
class ConfTalks {
  talks = [ {title: 't1', speaker: 'Brian', description: 'talk 1'},
            {title: 't2', speaker: 'Julie', description: 'talk 2'}];
}
@Component({
  selector: 'my-app',
  directives: [ConfTalks],
  template: '<conf-talks></conf-talks>'
})
class App {}
bootstrap(App, [])

错误是

EXCEPTION: Template parse errors:
Can't bind to 'ngFor' since it isn't a known native property
("<div [ERROR ->]*ngFor="talk of talks">

当在主入口点使用WebHostBuilder时，我如何指定它绑定到的端口?

默认情况下，它使用5000。

请注意，这个问题是特定于新的ASP。NET Core API(目前在1.0.0-RC2中)。

我是。net的新手，所以我决定使用。net Core，而不是学习“老方法”。我在这里找到了一篇关于为。net Core设置AutoMapper的详细文章，但是对于新手来说还有更简单的操作指南吗?

在谷歌Chrome的开发工具，当我选择一个元素，我看到==$0旁边选定的元素。这是什么意思?

请问如何在ASP中获取客户端IP地址?NET时使用MVC 6。 请求。ServerVariables["REMOTE_ADDR"]无效。

当我在VS2015中使用ASP运行PM> Remove-Migration -context BloggingContext时。NET Core项目使用EF Core我得到以下错误:

System.InvalidOperationException: The migration '20160703192724_MyFirstMigration' has already been applied to the database. Unapply it and try again. If the migration has been applied to other databases, consider reverting its changes using a new migration.    at Microsoft.EntityFrameworkCore.Migrations.Design.MigrationsScaffolder.RemoveMigration(String projectDir, String rootNamespace, Boolean force) 
    at Microsoft.EntityFrameworkCore.Design.MigrationsOperations.RemoveMigration(String contextType, Boolean force) 
    at Microsoft.EntityFrameworkCore.Tools.Cli.MigrationsRemoveCommand.<>c__DisplayClass0_0.<Configure>b__0() 
    at Microsoft.Extensions.CommandLineUtils.CommandLineApplication.Execute(String[] args) 
    at Microsoft.EntityFrameworkCore.Tools.Cli.Program.Main(String[] args) 
 The migration '20160703192724_MyFirstMigration' has already been applied to the database. Unapply it and try again. If the migration has been applied to other databases, consider reverting its changes using a new migration.

如何取消申请?我使用的是ASP的最新版本。NET Core 1.0, EF Core和VS2015更新3。

当我在.java文件中，未使用的代码通常是灰色的，或者有一个绿色下划线，表示这段代码可能(可能是因为一些奇怪的JNI/反射角情况)未使用。但是我有这个项目有数千个Java文件，我想找到这种可能未使用的代码的所有实例。如何在IntelliJ IDEA中做到这一点?