How to send bytes image to service in windows phone 7?

void SendPost()
                var url = "http://{ipaddress}/Network/Records/Registration?fname=tt&lname=tt&username=dddddddd&password=tt";

                HttpWebRequest myRequest = (HttpWebRequest)WebRequest.Create(url);
                myRequest.Method = "POST";
                myRequest.ContentType = "application/x-www-form-urlencoded";

                myRequest.BeginGetRequestStream(new AsyncCallback(GetRequestStreamCallback), myRequest);
void GetRequestStreamCallback(IAsyncResult asynchronousResult)
            HttpWebRequest request = (HttpWebRequest)asynchronousResult.AsyncState;
            System.IO.Stream postStream = request.EndGetRequestStream(asynchronousResult);
            string parametersString = "";

            byte[] byteArray = System.Text.Encoding.UTF8.GetBytes(str);
            // Write to the request stream.
            postStream.Write(byteArray, 0, byteArray.Length);
            // Start the asynchronous operation to get the response
            request.BeginGetResponse(new AsyncCallback(GetResponseCallback), request);

 void GetResponseCallback(IAsyncResult asynchronousResult)

                HttpWebRequest request = (HttpWebRequest)asynchronousResult.AsyncState;
                HttpWebResponse response = (HttpWebResponse)request.EndGetResponse(asynchronousResult);
                Stream streamResponse = response.GetResponseStream();
                StreamReader streamRead = new StreamReader(streamResponse);
                string responseString = streamRead.ReadToEnd();
                // Close the stream object
                // Release the HttpWebResponse

I wrote above code for sending image as's not giving any errors.but image was not uploading properly. i am passing base64 string of image in below code.

byte[] byteArray = System.Text.Encoding.UTF8.GetBytes(str);

Please tell me what was wrong.why image was not uploading properly?


See this: Photo upload with parameters to a PHP page

and this:

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