带图片的post数据请求

2019-04-15 13:47发布

站内文章 / PIC单片机
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/// /// Posts the pics. /// /// . /// URL. /// Pic file name. /// Pic path list. /// Parameter. public string PostPics (string url, string picFileName, List picPathList, Dictionary param) { string boundary = "----------------------------" + DateTime.Now.Ticks.ToString ("x"); HttpWebRequest request = WebRequest.Create (url) as HttpWebRequest; request.Method = "POST"; request.ContentType = "multipart/form-data; boundary=" + boundary; // 设置参数 request.AllowAutoRedirect = true; request.ContentType = "multipart/form-data;charset=utf-8;boundary=" + boundary; byte[] itemBoundaryBytes = Encoding.UTF8.GetBytes (" --" + boundary + " "); byte[] endBoundaryBytes = Encoding.UTF8.GetBytes (" --" + boundary + "-- "); Stream postStream = request.GetRequestStream (); postStream.Write (itemBoundaryBytes, 0, itemBoundaryBytes.Length); //files for (int i = 0; i < picPathList.Count; i++) { string FilePath = picPathList [i]; int pos = FilePath.LastIndexOf ("\"); string fileName = FilePath.Substring (pos + 1); //请求头部信息 string postDataName = picFileName + "[" + i + "]"; StringBuilder sbHeader = new StringBuilder (string.Format ("Content-Disposition:form-data;name="{0}";filename="{1}" Content-Type:application/octet-stream ", postDataName, fileName)); byte[] postHeaderBytes = Encoding.UTF8.GetBytes (sbHeader.ToString ()); FileStream fs = new FileStream (FilePath, FileMode.Open, FileAccess.Read); byte[] bArr = new byte[fs.Length]; fs.Read (bArr, 0, bArr.Length); fs.Close (); //file postStream.Write (postHeaderBytes, 0, postHeaderBytes.Length); postStream.Write (bArr, 0, bArr.Length); postStream.Write (itemBoundaryBytes, 0, itemBoundaryBytes.Length); } //key-values foreach (var a in param) { Debug.Log (a.Key + "：" + a.Value); StringBuilder nameHeader = new StringBuilder (string.Format ("Content-Disposition:form-data;name="{0}" {1}", a.Key, a.Value)); byte[] bs = Encoding.UTF8.GetBytes (nameHeader.ToString ()); postStream.Write (bs, 0, bs.Length); postStream.Write (itemBoundaryBytes, 0, itemBoundaryBytes.Length); } postStream.Write (endBoundaryBytes, 0, endBoundaryBytes.Length); postStream.Close (); //错误处理 StreamReader sr; HttpStatusCode hs = new HttpStatusCode(); try { //发送请求并获取相应回应数据 HttpWebResponse response = request.GetResponse () as HttpWebResponse; //直到request.GetResponse()程序才开始向目标网页发送Post请求 Stream instream = response.GetResponseStream (); hs = response.StatusCode; sr = new StreamReader (instream, Encoding.UTF8); } catch (WebException ex) { Stream responseStream = ex.Response.GetResponseStream (); sr = new StreamReader (responseStream, Encoding.UTF8); } //返回结果网页（html）代码 string content = sr.ReadToEnd (); Debug.Log (content); Debug.Log("ylj="+ hs.ToString()); return content; }

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