在POST参数中接收空值

Question

我在向控制器发出的web api rest post请求中始终收到一个空值

在我的控制器中

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

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

}

模型

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

请求：

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

Content-Type: application/json

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

我尝试了以下解决方案，但没有任何效果

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

如何在WebAPI中获取POST数据？

有没有人能帮助我或正确的链接

回答：提出了一个卷发请求，而不是像这样和邮递员打交道，这给了我解决方案

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

Answer 1

将您的实体设置为客户而不是字符串

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

确保方法上有[HttpPost]属性，也不需要[FromBody]

Answer 2

我认为你的意思是有一个客户对象作为输入，如下所示，而不是字符串

public HttpResponseMessage PostCustomer([FromBody]Customer customer)
 {

我们将在下面进行更改，并尝试重新发布请求。应该行得通

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

请求：

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