"找不到方法:'System.Net.Http.HttpRequestMessage System.Web.Http.ApiController.get_Request()'."

Question

简短的问题.这是我的控制器:

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

using Milos_MovieStore.DAL;
using Milos_MovieStore.Models;
using Milos_MovieStore.DTO;
using System.Data.Entity;

namespace Milos_MovieStore.Controllers.Api
{
    public class CustomersController : ApiController
    {

        private DBContext_MovieStore _dbcontext;

        public CustomersController()
        {
            _dbcontext = new DBContext_MovieStore();
        }
        protected override void Dispose(bool disposing)
        {
            _dbcontext.Dispose();
        }



        // GET /api/customers
        [HttpGet]
        public IHttpActionResult GetCustomers()
        {
            List<Customer> customers = _dbcontext.Customers.Include(c => c.MembershipType).ToList();

            return Ok(CustomersToDTOList(customers));
        }

        // GET /api/customers/1
        [HttpGet]
        public IHttpActionResult GetCustomer(int id)
        {
            Customer customer = _dbcontext.Customers.Include(c => c.MembershipType).SingleOrDefault(c => c.Id == id);
            if (customer == null)
                return NotFound();

            return Ok(CustomerToDTO(customer));
        }

        //POST /api/customers
        [HttpPost]
        public IHttpActionResult CreateCustomer(CustomerDTO customerDTO)
        {
            if (!ModelState.IsValid)
                return BadRequest();

            _dbcontext.Customers.Add(DTOToCustomer(customerDTO));
            _dbcontext.SaveChanges();

            return Created(new Uri(Request.RequestUri + "/" + customerDTO.Id), customerDTO);
        }

        // PUT /api/customer/1
        [HttpPut]
        public IHttpActionResult UpdateCustomer(CustomerDTO customerDTO)
        {
            if (!ModelState.IsValid)
                return BadRequest();

            Customer customerInDB = _dbcontext.Customers.SingleOrDefault(c => c.Id == customerDTO.Id);
            if (customerInDB == null)
                return NotFound();

            MapDTOToCustomer(customerDTO, customerInDB);
            _dbcontext.SaveChanges();

            return Ok(customerDTO);
        }

        // DELETE /api/customer/1
        [HttpDelete]
        public IHttpActionResult DeleteCustomer(int id)
        {
            if (!ModelState.IsValid)
                return BadRequest();

            Customer customerInDB = _dbcontext.Customers.SingleOrDefault(c => c.Id == id);
            if (customerInDB == null)
                return NotFound();

            _dbcontext.Customers.Remove(customerInDB);
            _dbcontext.SaveChanges();

            return Ok(id);
        }




        private CustomerDTO CustomerToDTO(Customer customer)
        {
            CustomerDTO customerDTO = new CustomerDTO();

            customerDTO.Id = customer.Id;
            customerDTO.Name = customer.Name;
            customerDTO.DOB = customer.DOB;
            customerDTO.MembershipTypeId = customer.MembershipTypeId;
            customerDTO.IsSubscribedToNewsletter = customer.IsSubscribedToNewsletter;

            return customerDTO;
        }


        private Customer DTOToCustomer(CustomerDTO customerDTO)
        {
            Customer customer = new Customer();

            customer.Id = customerDTO.Id;
            customer.Name = customerDTO.Name;
            customer.DOB = customerDTO.DOB;
            customer.MembershipTypeId = customerDTO.MembershipTypeId;
            customer.IsSubscribedToNewsletter = customerDTO.IsSubscribedToNewsletter;

            return customer;
        }


        private void MapDTOToCustomer(CustomerDTO customerDTO, Customer customer)
        {
            customer.Id = customerDTO.Id;
            customer.Name = customerDTO.Name;
            customer.DOB = customerDTO.DOB;
            customer.MembershipTypeId = customerDTO.MembershipTypeId;
            customer.IsSubscribedToNewsletter = customerDTO.IsSubscribedToNewsletter;
        }

        private IEnumerable<CustomerDTO> CustomersToDTOList(IEnumerable<Customer> customers)
        {
            List<CustomerDTO> customersDTO = new List<CustomerDTO>();

            foreach (Customer c in customers)
            {
                customersDTO.Add(CustomerToDTO(c));
            }

            return customersDTO;
        }


    }
}

......这是我的DTO:

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

using System.ComponentModel.DataAnnotations;

namespace Milos_MovieStore.DTO
{
    public class CustomerDTO
    {
        public int Id { get; set; }
        [Required]
        [StringLength(255)]
        public string Name { get; set; }
        public DateTime? DOB { get; set; }
        public byte MembershipTypeId { get; set; }
        public bool IsSubscribedToNewsletter { get; set; }

    }
}

...这是我的POST请求:

...正如您在屏幕截图中看到的那样,我正在将JTO中的DTO发送到API控制器中的POST方法.我只是找不到解决方案.DELETE和GET请求没有问题.这是一个培训项目,所以不要担心我在控制器中放置的那些奇怪的临时映射方法......

Answer 1

我找到了解决方案.

在我开始构建之后,构建警告将进入输出窗口但未显示在主错误/警告窗口中.

检查输出/错误窗口,如果有错误或警告,然后尝试解决它..

他们与汇编冲突有关,并建议将汇编重定向放在web.Config中.

一旦我完成了所有这一切,它现在有效.

例如 :

  <dependentAssembly>
    <assemblyIdentity name="System.Net.Http" culture="neutral" publicKeyToken="b03f5f7f11d50a3a" />
    <bindingRedirect oldVersion="0.0.0.0-4.2.0.0" newVersion="4.2.0.0" />
  </dependentAssembly>

你可以尝试的另一件事是:让你的方法像

public IHttpActionResult CreateCustomer([FromBody]CustomerDTO customerDTO){}

看看这有帮助..

Answer 2

我有同样的问题，但来自不同的方面。我也有带有 System.Net.Http 库的MyProject和带有 System.Net.Http 的MyUnitTestProject。曾几何时，我开始了单元测试，它因一个奇怪的问题而崩溃。不确定：测试未运行：

哪里有一些例外“JetBrains 退出了代码......”，这对我来说没有任何意义：

然后我发现问题出在 System.Net.Http 的绑定重定向中，它是由一些 NuGet 包添加的。我删除了绑定重定向，但获得了另一个异常，接近您的“System.Net.Http.HttpRequestMessage...”：

问题出在库的版本中 - 在MyProject 中是 4.0.0.0（来自 .net Framework），但MyUnitTestProject是 4.2.0.0（来自 Visual Studio 文件夹），并且为 4.2.0.0 添加了绑定重定向，我认为它以某种方式不能成立。所以我将其更改为 4.0.0.0 并且它起作用了：

<dependentAssembly>
    <assemblyIdentity name="System.Net.Http" culture="neutral" publicKeyToken="b03f5f7f11d50a3a" />
    <bindingRedirect oldVersion="0.0.0.0-4.2.0.0" newVersion="4.0.0.0" />
</dependentAssembly>