ASP.NET MVC - “无法等待‘方法组’”，并且“找不到命名空间名称‘ASPNETCoreWebApplication’”

Question

遇到一个问题，return View(await _context.Reviews.ToListAsync);出现以下错误：Cannot await 'method group'

我相信要使用该return View(await _context.Reviews.ToListAsync);语句，我需要使用using ASPNETCoreWebApplication.data（因此我包含它），但它返回一个错误：The type or namespace 'ASPNETCoreWebApplication' could not be found [...]。

如果我删除using <project_name>data，则会出现与上面ApplicationDbContextin相同的HomeController.cs错误

以下是我的HomeController.cs：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Mvc;
using ASPNETCoreWebApplication.Data; // "The type or namespace 'ASPNETCoreWebApplication' could not be found [...]"
using <project_name>.Data;
using Microsoft.EntityFrameworkCore;

namespace <project_name>.Controllers
{
    public class HomeController : Controller
    {
        private readonly ApplicationDbContext _context;

        public HomeController(ApplicationDbContext context)
        {
            _context = context;
        }

        public async Task<IActionResult> Reviews()
        {
            // "Cannot await 'method group'"
            return View(await _context.Reviews.ToListAsync);
        }

        public IActionResult Error()
        {
            return View();
        }
    }
}

如果可能相关，这是我的Reviews.cs模型：

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

namespace <project_name>.Models
{
    public class Reviews
    {
        public int Id { get; set; }
        public string Date { get; set; }
        public string Name { get; set; }
        public string Heading { get; set; }
        public string Restaurant { get; set; }
        public string Comment { get; set; }
        public int Rating { get; set; }
        public int Agree { get; set; }
        public int Disagree { get; set; }
    }
}

在HomeController.cs，

Answer 1

不要犯忘记括号的菜鸟错误：

public async Task<IActionResult> Reviews()
        {
            return View(await _context.Reviews.ToListAsync());
        }