ASP.NET语法和约定

Question

我正在阅读使用ASP.NET设计Evolvable Web API.在其中一个练习中,本书让我使用Visual Studio编辑Controller.这是在使用C#的ASP.NET中完成的.我使用的模板是标准的ASP.NET Web应用程序API.

我已经按照书中显示的方式编辑了控制器(虽然它似乎没有给出非常具体的指示).这是我的控制器的样子.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;

using System;
using System.Collections.Generic;
using System.Net.Http;
using System.Security.Claims;
using System.Security.Cryptography;
using System.Threading.Tasks;
using System.Web;
using System.Web.Http;
using System.Web.Http.ModelBinding;
using Microsoft.AspNet.Identity;
using Microsoft.AspNet.Identity.EntityFramework;
using Microsoft.AspNet.Identity.Owin;
using Microsoft.Owin.Security;
using Microsoft.Owin.Security.Cookies;
using Microsoft.Owin.Security.OAuth;
using WebApplication4.Models;
using WebApplication4.Providers;
using WebApplication4.Results;

namespace WebApplication4.Controllers
{
    public class GreetingController : ApiController
    {
           public string GetGreeting() {
            return "Hello World!";
            }

    }
    public static List<Greeting> _greetings = new List<Greeting>();
    public HttpResponseMessage PostGreeting(Greeting greeting)
    {
        _greetings.Add(greeting);
        var greetingLocation = new Uri(this.Request.RequestUri, "greeting/" + greeting.Name);
        var response = this.Request.CreateResponse(HttpStatusCodeResult.Created);
        response.Headers.Location = greetingLocation;
        return response;

    }
}

我收到错误:

• _greetings:命名空间不能直接包含诸如字段或方法之类的成员
• PostGreeting:命名空间不能直接包含字段或方法等成员,
• _greetings:在当前上下文中不存在
• 请求:<invalid-global-code >不包含'request'的定义,
• 创建:HttpStatusCodeREsult不包含'Created'的定义

Answer 1

由于错误试图告诉您,您的字段和方法必须在类中.
检查你的牙套.