Here is the working code for Photo upload with metadata using OAuth 2.0 in
C#
string responseString = "";
string filePath = "COMPLETE FILE PATH"
string extension=(Path.GetExtension (filePath)).TrimStart ('
.');
byte[] image = System.IO.File.ReadAllBytes(filePath);
int imglenth= image.Length;
String boundary = "
0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
Console.WriteLine("BOUNDARY:" + boundary);
StringBuilder writeData = new StringBuilder();
writeData.Append("--").Append(boundary).Append("\r\n");
writeData.Append("Content-Type: application/atom+xml;\r\n\r
\n");
writeData.Append("<entry xmlns='http://www.w3.org/2005/Atom'
>\r\n");
writeData.Append("<title>"+Path.GetFileName (filePath)+"</
title>\r\n");
writeData.Append("<summary></summary>\r\n");
writeData.Append("<category scheme=\"http://schemas.google.
com/g/2005#kind\"\r\n");
writeData.Append("term=\"http://schemas.google.com/photos/
2007#photo\"/>\r\n");
writeData.Append("</entry>\r\n");
writeData.Append("--").Append(boundary).Append("\r\n");
writeData.Append("Content-type: image/"+extension+"\r\n\r\n"
);
StringBuilder endOfPart = new StringBuilder();
endOfPart.Append("\r\n--").Append(boundary).Append("--");
long totalLenght = writeData.Length + image.Length +
endOfPart.Length;
Uri serverUrl = new Uri("https://picasaweb.google.com/data/
feed/api/user/default/albumid/"+albumId+"?access_token=YOUR ACCESS TOKEN
HERE");
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(
serverUrl+tc.auth_Token);
request.Method = "POST";
byte[] bytes,bytes1;
bytes = System.Text.Encoding.ASCII.GetBytes(writeData.
ToString ());
bytes1= System.Text.Encoding.ASCII.GetBytes(endOfPart.
ToString ());
request.ContentType ="multipart/related; boundary=\"" +
boundary + "\"";
request.ContentLength = totalLenght;
request.Headers.Add("GData-Version","2");
request.Headers.Add("MIME-Version","1.0");
Stream requestStream = request.GetRequestStream();
requestStream.Write(bytes, 0, bytes.Length);
requestStream.Write(image,0,image.Length);
requestStream.Write (bytes1,0,bytes1.Length);
HttpWebResponse response;
response = (HttpWebResponse)request.GetResponse();
if(requestStream!=null)
requestStream.Close ();
if(response!=null)
response.Close ();
Hope this helps :)
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