[HttpPost] public HttpResponseMessage Post([FromBody] DingTalkCallBack bodyMsg, string signature, string timestamp, string nonce) { var checkCode = ISVCallbackProvider.Instance.ISVCallback(bodyMsg.encrypt, signature, timestamp, nonce); var result = toJson(checkCode); return result; } public static HttpResponseMessage toJson(Object obj) { String str; if (obj is String || obj is Char) { str = obj.ToString(); } else { javascriptSerializer serializer = new JavaScriptSerializer(); str = serializer.Serialize(obj); } HttpResponseMessage result = new HttpResponseMessage { Content = new StringContent(str, Encoding.GetEncoding("UTF-8"), "application/json") }; return result; }