如何从Android向C#web API发送post请求

Question

    public class TestController : ApiController
    {
        // POST: api/test
        [HttpPost]
        [Route("api/test")]
        public void Post()
        {
            string param = Request.Content.ReadAsStringAsync().Result;
            EventLogger.writeErrorLog("Posted payload --> " + param)
        }
   }

private void postDummy() {
    String url = "http://10.0.2.2:1106/api/test";

    RequestQueue requestQueue = Volley.newRequestQueue(this);
    JSONObject jsonBodyObj = new JSONObject();

    try{
        jsonBodyObj.put("payload", "XYZ");
    }catch (JSONException e){
        e.printStackTrace();
    }
    final String requestBody = jsonBodyObj.toString();
    Log.d("Json :--> ", requestBody);

    JsonObjectRequest jsonObjectRequest = new JsonObjectRequest(Request.Method.POST,
            url, null, new Response.Listener<JSONObject>(){
        @Override    public void onResponse(JSONObject response) {
            Log.i("Response",String.valueOf(response));
        }
    }, new Response.ErrorListener() {
        @Override    public void onErrorResponse(VolleyError error) {
            VolleyLog.e("Error: ", error.getMessage());
        }
    }){
        @Override
        public String getBodyContentType() {
            return "application/json";
        }

        @Override
        public byte[] getBody() {
            try {
                return requestBody == null ? null : requestBody.getBytes("utf-8");
            } catch (UnsupportedEncodingException uee) {
                VolleyLog.wtf("Unsupported Encoding while trying to get the bytes of %s using %s",
                        requestBody, "utf-8");
                return null;
            }
        }
    };

    requestQueue.add(jsonObjectRequest);
}

D/Json :-->: {"payload":"XYZ"}

Postman测试结果Web API测试结果截图

Answer 1

我的情况非常相似，当我从android volley调用时，C#web API返回400（自定义头）。解决方案（在我的例子中）很简单，只是删除了“content-type”“application/json”，让volley做它所做的任何事情。

我的代码工作：Android：

                try{
                JSONObject postparams = new JSONObject();
                postparams.put("param1", "1");
                postparams.put("param2", "2");
                String URL=sesion.urlAire + "api/adjunto/getArchivo";
                RequestQueue requestQueue= Volley.newRequestQueue(context);
                JsonObjectRequest objectRequest=new JsonObjectRequest(
                    Request.Method.POST,
                    URL,
                    postparams,
                    new Response.Listener<JSONObject>() {
                        @Override
                        public void onResponse(JSONObject  response) {
                            //do something
                        }
                    },
                    new Response.ErrorListener() {
                        @Override
                        public void onErrorResponse(VolleyError error) {
                            //do something
                        }
                    }
                )
                {
                    @Override
                    public Map getHeaders() throws AuthFailureError {
                        HashMap headers = new HashMap();
                        //headers.put("Content-Type", "application/json");
                        headers.put("authorization", sesion.token);
                        return headers;
                    }
                };
                requestQueue.add(objectRequest);

            }catch (Exception e){}

C#:

    [HttpPost]
    public CustomObject getArchivo(PostData postData) {
        return new CustomObject{ param1="1" };
    }