您不能将“RESTfullApi.Models.Product []”隐式转换为“RESTfullApi.Models.Product”

Question

我正在尝试学习如何创建 Web Api，但我遇到了一个错误。

我不知道该怎么办，首先我使用它时需要使用后缀M，VS显示错误：

您不能将“RESTfullApi.Models.Product []”隐式转换为 "RESTfullApi.Models.Product"

我试图在互联网上找到答案，但没有解释这个案例。 也许你知道它有什么问题？

这是我练习的教程： https://docs.microsoft.com/en-us/aspnet/web-api/overview/getting-started-with-aspnet-web-api/tutorial-your-first-web-api

ProductsController.cs

using RESTfullApi.Models;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Net.Http;
using System.Web.Http;

namespace RESTfullApi.Controllers
{
    public class ProductsController : ApiController
    {
        Product products = new Product[]
        {
            new Product { Id = 1, Name = "Pizza Margarita", Category = "Pizza", Price = 13.00M },
            new Product { Id = 2, Name = "Pizza Double Cheese", Category = "Pizza", Price = 17.00M }
        };

        public IEnumerable<Product> GetAllProducts()
        {
            return products;
        }
    }
}

Product.cs（模型）

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

namespace RESTfullApi.Models
{
    public class Product
    {
        public int Id { get; set; }
        public string Name { get; set; }
        public string Category { get; set; }
        public decimal Price { get; set; }
    }
}

Answer 1

消息是不言自明的。将products 更改为

Product[] products = new Product[]
{
    new Product { Id = 1, Name = "Pizza Margarita", Category = "Pizza", Price = 13.00M },
    new Product { Id = 2, Name = "Pizza Double Cheese", Category = "Pizza", Price = 17.00M }
};