Below is the ASP.NET C# implementation of Uploading binary data like images as POST request to target URL:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 | private bool UploadFile(string PostURL) { try { int contentLength = fileUpload.PostedFile.ContentLength; byte[] data = new byte[contentLength]; fileUpload.PostedFile.InputStream.Read(data, 0, contentLength); // Prepare web request... HttpWebRequest webRequest = (HttpWebRequest)WebRequest.Create(PostURL); webRequest.Method = "POST"; webRequest.ContentType = "multipart/form-data"; webRequest.ContentLength = data.Length; using (Stream postStream = webRequest.GetRequestStream()) { // Send the data. postStream.Write(data, 0, data.Length); postStream.Close(); } return true; } catch (Exception ex) { //Log exception here... return false; } } |
The binary data so posted can be retrieved on target post URL using below code:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 | byte[] Image = ReadFully(Request.InputStream); ................. public static byte[] ReadFully(Stream input) { byte[] buffer = new byte[16 * 1024]; using (MemoryStream ms = new MemoryStream()) { int read; while ((read = input.Read(buffer, 0, buffer.Length)) > 0) { ms.Write(buffer, 0, read); } return ms.ToArray(); } } |
This scenario is very handy specifically in establishing communication between two different web technologies. For example: You can POST image …
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