System.IO.Stream MyStream;
FileLen = oys_image.PostedFile.ContentLength;
byte[] input = new byte[FileLen];
MyStream = oys_image.PostedFile.InputStream;
MyStream.Read(input,  0 , FileLen);


SqlCommand cmd;
cmd = new SqlCommand( "oys_map_update" , conn);
cmd.CommandType = CommandType.StoredProcedure;
cmd.Parameters.Add( "@id" , SqlDbType.Int).Value = id;
cmd.Parameters.Add( "@image" , Convert.ChangeType(MyStream);

Error: Index (zero based) must be greater than or equal to zero and less than the size of the argument list.