PostAsync参数始终为空

Question

我正在调用API Post方法，但是，我不确定我在做什么错误，但API中的值始终为空。我从下面调用API的方法。当我碰到这个时，我可以看到Ids是以5个值为单位的整数列表。

private void Save(List<int> Ids) 
{ 
    var myAPI = ConfigurationManager.AppSettings["MyAPI"]; 

    string myIds = string.Join(",", Ids); 

    using (var client = new HttpClient()) 
    { 

    int result = client.PostAsync(myAPI, new { test = myIds }, new JsonMediaTypeFormatter()) 
         .Result 
         .Content 
         .ReadAsAsync<int>() 
         .Result; 
    } 
} 

我的API签名是像下面 - 断点上我可以看到它被击中，但测试我试图传递参数总是空

[HttpPost] 
    [Route("api/MyController/SaveData")] 
    public HttpResponseMessage SaveData([FromBody]List<string> test) 
    { 
     try 
     { 
     //Rest of method removed for brevity 

我曾试图消除[ FromBody]从控制器的WebAPI测试，但仍然标注在保存数据API方法得到空与断点

Answer 1

试试这个：

private void Save(List<int> Ids) 
{ 
    var myAPI = ConfigurationManager.AppSettings["MyAPI"]; 

    using (var client = new HttpClient()) 
    { 
     var requestBody = JsonConvert.SerializeObject(Ids); 
     var postRequest = new StringContent(requestBody, Encoding.UTF8, "application/json"); 

     var response = client.PostAsync(myAPI, postRequest).GetAwaiter().GetResult(); 
     var rawResponse = response.Content.ReadAsStringAsync().GetAwaiter().GetResult(); 
     // Do something with the answer 
    } 
} 

我也建议在该调用之前制作方法private Task Save并用await代替.GetAwaiter().GetResult();。