将 ViewModel 发送到 API ASP.net Core 2

我正在一个项目 Core 2.2 API Project for Db Layer Web Project For Views

我可以从 API 读取数据但是我在发送数据以进行更新时遇到问题

代码

1- 从 Web 项目发送数据

 [HttpPost]
    public async Task<IActionResult> Edit(NationalityViewModel nationality )
    {
        LawyerAPI lawyerAPI = new LawyerAPI();
        HttpClient httpClient = lawyerAPI.InitializeClient();            
       HttpResponseMessage res = await httpClient.PutAsJsonAsync("api/nofactory/updatenationality", nationality);       
        return View(nationality);

    }

2-初始化客户端

 private string _apiBaseURI = "http://localhost:57030";
    public HttpClient InitializeClient()
    {
        var client = new HttpClient();
        //Passing service base url  
        client.BaseAddress = new Uri(_apiBaseURI);
        client.DefaultRequestHeaders.Clear();
        //Define request data format  
        client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));

        return client;

    }

3- API

  [Route("updatenationality")]

    public IActionResult Put(NationalityViewModel nationality)
    { 

        var nat=new Nationality();
        nat.Name=nationality.Name;
        nat.IsActive=nationality.IsActive;
        nat.Id=nationality.Id;
             _NationalityRepository.Update(nat);

        return Ok();
    }

问题是Web项目中的国籍变量有数据，当发送到API时它是空模型断点命中API方法但变量是空的

我认为问题是发送功能

谢谢

编辑澄清我添加了图像