邮递员问题JSON值无法转换为agsamplewebapi.Model.Employee

Question

我正在开发ASP。NET Core web api应用程序将暴露于Angular 6

在开发web api Post请求之后，我继续到PostMan检查Post请求，它得到一个错误“JSON值不能被转换成agsamplewebapi . model . employee . Path:$ | line number:0 | bytepositoninline:1。”

模型代码

 public class Employee
  {
    public int Id { get; set; }
    public string Eno { get; set; }
    public string Ename { get; set; }
    public decimal Salary { get; set; }
    public string Gender { get; set; }
    public string Designation { get; set; }
  }

控制器代码

[EnableCors("CorsPolicy")]
  [Route("api/[controller]")]
  [ApiController]
  public class EmployeesController : ControllerBase
  {
    private readonly EmployeeContext _context;

    public EmployeesController(EmployeeContext context)
    {
      _context = context;
    }
    // POST: api/Employees
    [HttpPost]
    public async Task<ActionResult<Employee>> PostEmployee(Employee employee)
    {
      _context.Employee.Add(employee);
      await _context.SaveChangesAsync();

      return CreatedAtAction("GetEmployee", new { id = employee.Id }, employee);
    }

 }

将Postman与https://localhost:44333/API/Employees一起使用时，在Postman窗口下将显示“Json值无法转换为agsamplewebapi . model . employee . Path:$ | line number:0 | bytepositoninline:1”

[
    {    
        "Eno": "112",
        "Ename": "zzz",
        "Salary": 1888.00,
        "Gender": "M",
        "Designation": "gghh"
    }
]

为我提供合适的指南来解决这个问题

Answer 1

您有两种解决方案来解决此问题：

1-从Json中删除[]，就像我的评论一样：

{    
   "Eno": "112",
   "Ename": "zzz",
   "Salary": 1888.00,
   "Gender": "M",
   "Designation": "gghh"
}

2-[]表示一个集合，然后您可以更改操作签名，而无需将Json

public async Task<ActionResult<Employee>> PostEmployee(IEnumerable<Employee> employee)
{}