asp.net-mvc - 从 MVC POST 操作方法调用 Web API 并接收结果

Question

我正在尝试从 MVC POST 操作方法调用 Web API 并接收结果但不确定如何，例如:

    [HttpPost]
    public ActionResult Submit(Model m)
    {
        // Get the posted form values and add to list using model binding
        IList<string> MyList = new List<string> { m.Value1,
                m.Value2, m.Value3, m.Value4};

        return Redirect???? // Redirct to web APi POST

        // Assume this would be a GET?
        return Redirect("http://localhost:41174/api/values")
    }

我希望将上面的MyList发送到Web Api进行处理，然后它将结果(int)发送回原始 Controller :

// POST api/values
    public int Post([FromBody]List<string> value)
    {
        // Process MyList

        // Return int back to original MVC conroller
    }

不知道如何进行，任何帮助表示赞赏。

Answer 1

您不应该使用 POST, a redirect almost always uses GET 进行重定向，但无论如何您也不想重定向到 API:浏览器将如何处理响应？

您必须执行 POST from your MVC controller and return the data 。

像这样的东西:

[HttpPost]
public ActionResult Submit(Model m)
{
    // Get the posted form values and add to list using model binding
    IList<string> postData  = new List<string> { m.Value1, m.Value2, m.Value3, m.Value4 };

    using (var client = new HttpClient())
    {
        // Assuming the API is in the same web application. 
        string baseUrl = HttpContext.Current
                                    .Request
                                    .Url
                                    .GetComponents(UriComponents.SchemeAndServer, UriFormat.SafeUnescaped);
        client.BaseAddress = new Uri(baseUrl);
        int result = client.PostAsync("/api/values", 
                                      postData, 
                                      new JsonMediaTypeFormatter())
                            .Result
                            .Content
                            .ReadAsAsync<int>()
                            .Result;

        // add to viewmodel
        var model = new ViewModel
        {
            intValue = result
        };

        return View(model);
    }           
}