Receiving null value in POST param

Question

I receive a null value always in web api rest post request to a controller

In my controller

[HttpPost]
public HttpResponseMessage PostCustomer([FromBody]Customer customer)
{

       System.Diagnostics.Debug.WriteLine(customer); #CustomerApp.Models.Customer
       System.Diagnostics.Debug.WriteLine(customer.FirstName); #null

}

Model

public class Customer
{
    public int Id { get; set; }
    public string LastName { get; set; }
    public string FirstName { get; set; }
}

Request:

POST: http://localhost:21894/api/customer/postcustomer

Content-Type: application/json

body: {FirstName: "xxxx", LastName: 'yyyy'}

I tried the following solutions but nothing works out

https://myadventuresincoding.wordpress.com/2012/06/19/c-supporting-textplain-in-an-mvc-4-rc-web-api-application/

How to get POST data in WebAPI?

Can anybody guide me with help or the correct link

Answer: Made a curl request instead of dealing with postman as like this gave me the solution

$ curl -H "Content-Type: application/json" -X POST -d '{"FirstName":"Jefferson","LastName":"sampaul"}' http://localhost
:21894/api/customer/postcustomer

Answer 1

I think you mean to have a Customer object as input like below instead of string

public HttpResponseMessage PostCustomer([FromBody]Customer customer)
 {

Well make this below change and try reposting the request. It should work

public HttpResponseMessage PostCustomer(Customer customer)
 {
   return OK(customer.FirstName);
 }

Request:

POST: http://localhost:21894/api/customer/postcustomer
Content-Type: application/json; charset=utf-8
{"Id":101,"FirstName":"xxxx","LastName":'yyyy'}

Answer 2

set your entity to be a customer not a string

[HttpPost]
public Customer PostCustomer(Customer customer)
{
    System.Diagnostics.Debug.WriteLine(customer);
    return customer;
}

Make sure you have [HttpPost] attribute on your method also no need for the [FromBody]