Httprequest 添加Cookie

    string postData = "Inputs={\"BarCode\":\"" + barCode + "\"}"; // 要发放的数据

                //var str = JsonConvert.SerializeObject(postData);

                byte[] byteArray = Encoding.UTF8.GetBytes(postData);

                HttpWebRequest objWebRequest = (HttpWebRequest)WebRequest.Create("http://180.96.21.213:8890/action.ashx?action=IndexDetailInfosUrl");

                objWebRequest.Method = "POST";

                objWebRequest.ContentType = "application/x-www-form-urlencoded;charset=UTF-8";

                objWebRequest.ContentLength = byteArray.Length;

                objWebRequest.Headers.Add("Cookie", "companyid=XZGH");

                //objWebRequest.CookieContainer = myCookieContainer;

                Stream newStream = objWebRequest.GetRequestStream();

                newStream.Write(byteArray, , byteArray.Length); //写入参数

                newStream.Close();

                HttpWebResponse response = (HttpWebResponse)objWebRequest.GetResponse();

                StreamReader sr = new StreamReader(response.GetResponseStream(), Encoding.UTF8);

                string textResponse = sr.ReadToEnd(); // 返回的数据

                return textResponse;