winform post请求

 string strURL = "http://192.10.33.116:7080/path";

            HttpWebRequest request;

            request = (System.Net.HttpWebRequest)HttpWebRequest.Create(strURL);

            request.Method = "POST";

            request.Timeout = 5000;

            string content= @"'{""ESBEntry"": { ""MessageHeader"": {""Fid"": ""BS10055"",""SourceSysCode"": ""S01"",""MsgDate"": ""2017-11-23 11:07:16"",""TargetSysCode"": ""S54""},""MsgInfo"": {""Msg"":{""app_id"":""1BQA48ETK000A718A8C000001FFAA482"",""biz_content"":""{\""ehealth_code\"":\""'+as_ww+'\"",\""out_verify_no\"":\""V17093010293781\"",\""out_verify_time\"":\""20171116103419\""}"",""enc_type"":""Plain"",""method"":""ehc.ehealthcode.verify"",""sign"":""066ABD551FDDBC9E4F877B87BE4A7424"",""sign_type"":""MD5"",""term_id"":""35020010001"",""timestamp"":""1510799659171"",""version"":""X.M.0.1""} }}}'";

            MessageBox.Show(content);     

            request.ContentType = content;



            byte[] payload;

            //将URL编码后的字符串转化为字节

            payload = System.Text.Encoding.UTF8.GetBytes("");

            //设置请求的 ContentLength 

            request.ContentLength = payload.Length;

            //获得请 求流

            Stream write = request.GetRequestStream();

            //将请求参数写入流

            write.Write(payload, 0, payload.Length);

            // 关闭请求流

            write.Close();

            HttpWebResponse resposne = (HttpWebResponse)request.GetResponse();

            StreamReader reader =new StreamReader(resposne.GetResponseStream(),Encoding.UTF8) ;

            string responseText = reader.ReadToEnd();

            reader.Close();