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    <p>I was looking for something like this, Found in : <a href="http://bytes.com/groups/net-c/268661-how-upload-file-via-c-code" rel="noreferrer">http://bytes.com/groups/net-c/268661-how-upload-file-via-c-code</a> (modified for correctness):</p> <pre><code>public static string UploadFilesToRemoteUrl(string url, string[] files, NameValueCollection formFields = null) { string boundary = "----------------------------" + DateTime.Now.Ticks.ToString("x"); HttpWebRequest request = (HttpWebRequest) WebRequest.Create(url); request.ContentType = "multipart/form-data; boundary=" + boundary; request.Method = "POST"; request.KeepAlive = true; Stream memStream = new System.IO.MemoryStream(); var boundarybytes = System.Text.Encoding.ASCII.GetBytes("\r\n--" + boundary + "\r\n"); var endBoundaryBytes = System.Text.Encoding.ASCII.GetBytes("\r\n--" + boundary + "--"); string formdataTemplate = "\r\n--" + boundary + "\r\nContent-Disposition: form-data; name=\"{0}\";\r\n\r\n{1}"; if (formFields != null) { foreach (string key in formFields.Keys) { string formitem = string.Format(formdataTemplate, key, formFields[key]); byte[] formitembytes = System.Text.Encoding.UTF8.GetBytes(formitem); memStream.Write(formitembytes, 0, formitembytes.Length); } } string headerTemplate = "Content-Disposition: form-data; name=\"{0}\"; filename=\"{1}\"\r\n" + "Content-Type: application/octet-stream\r\n\r\n"; for (int i = 0; i &lt; files.Length; i++) { memStream.Write(boundarybytes, 0, boundarybytes.Length); var header = string.Format(headerTemplate, "uplTheFile", files[i]); var headerbytes = System.Text.Encoding.UTF8.GetBytes(header); memStream.Write(headerbytes, 0, headerbytes.Length); using (var fileStream = new FileStream(files[i], FileMode.Open, FileAccess.Read)) { var buffer = new byte[1024]; var bytesRead = 0; while ((bytesRead = fileStream.Read(buffer, 0, buffer.Length)) != 0) { memStream.Write(buffer, 0, bytesRead); } } } memStream.Write(endBoundaryBytes, 0, endBoundaryBytes.Length); request.ContentLength = memStream.Length; using (Stream requestStream = request.GetRequestStream()) { memStream.Position = 0; byte[] tempBuffer = new byte[memStream.Length]; memStream.Read(tempBuffer, 0, tempBuffer.Length); memStream.Close(); requestStream.Write(tempBuffer, 0, tempBuffer.Length); } using (var response = request.GetResponse()) { Stream stream2 = response.GetResponseStream(); StreamReader reader2 = new StreamReader(stream2); return reader2.ReadToEnd(); } } </code></pre>
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    1. POUpload files with HTTPWebrequest (multipart/form-data)
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    1. USandrewf
    1. USdr. evil
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    1. This table or related slice is empty.
    1. POUpload files with HTTPWebrequest (multipart/form-data)
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    1. COFYI...you can refactor out the intermediate MemoryStream and write directly to the request stream. The key is to be sure to close the request stream when you're done, which sets the content length of the request for you!
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      1. USJohn Clayton
    2. COThat worked for me once I removed an extra space. "r\n Content-Type: application/octet-stream" needed to be "\r\nContent-Type: application/octet-stream".
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      1. USKarl B
    3. COI also found that the double \r\n at the end of headers can cause problems. Removing one of them fixed my problems.
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      1. USHugo Estrada
 

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