Question

我正在使用Core 2.2项目 Db层的API项目 Web项目视图

我可以从API读取数据但是我在发送数据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-InitializeClient

 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项目中的国籍变量具有数据，并且当发送到API时它是空模型，断点命中了API方法，但是变量为空

我认为问题在于发送功能

谢谢

为澄清起见，我添加了图片

Answer 1

您必须告诉框架从请求主体进行绑定。您可以通过使用NationalityViewModel属性注释[FromBody]参数来实现。

public IActionResult Put([FromBody] NationalityViewModel nationality)

将ViewModel发送到API ASP.net Core 2

1 个答案: