"Method not found: 'System.Net.Http.HttpRequestMessage System.Web.Http.ApiController.get_Request()'."

Question

Here is my controller:

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;         }     } } 

My 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; }     } } 

My POST request:

As you can see in the screenshot, I'm sending DTO in JSON to POST method in API controller. I just can't find a solution. DELETE and GET requests are working with no problem. It is a training project so don't worry about those weird temporary mapping methods I have put in controller.

Answer 1

I found a solution to this.

After I started building, there was build warnings going to the output window but not showing in the main error / warning window.

Check your output/error window if there are errors or warning then try to solve it.

They were to do with assembly conflicts and said recommend putting the assembly redirect in the web.Config.

Once I had went through them all, it now works.

For example:

  <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> 

other thing you can try is: make your method like

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

see if this helps.

Answer 2

I have the same problem but from a different side. I have the MyProject with System.Net.Http library and MyUnitTestProject with System.Net.Http too. Once upon a time then I started Unit Tests it crashed with a strange problem. Inconclusive: test not run:

And where was some exception "JetBrains exited with code ...." which says nothing for me:

Then I figured out what the problem was in the binding redirect for System.Net.Http which was added by some NuGet package. I remove the binding redirect, but gain another exception, close to yours "System.Net.Http.HttpRequestMessage...”:

The problem was in versions of libraries - in MyProject was 4.0.0.0 (from .net Framework), but MyUnitTestProject was 4.2.0.0 (from Visual Studio folder), and the binding redirect was added for 4.2.0.0 which I think somehow cant be found. So I change it to 4.0.0.0 and it worked:

<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>