获取地址栏的IP和端口，将URL地址图片转换为二进制

                    string Path = "http://" + HttpContext.Current.Request.Url.Host + ":" + HttpContext.Current.Request.Url.Port;

                    string url = Path + AuditNameImagePath;//生成路径AP转换用

                    String fileName = url.Substring(url.LastIndexOf("/") + 1);

                    String refer = url.Substring(0, url.LastIndexOf("/") + 1);

                    System.Net.HttpWebRequest req = System.Net.HttpWebRequest.Create(url) as System.Net.HttpWebRequest;

                    req.AllowAutoRedirect = true;

                    req.Referer = refer;

                    req.UserAgent = "Mozilla/5.0 (Windows; U; Windows NT 6.1; zh-CN; rv:1.9.2.13) Gecko/20101203 Firefox/3.6.13";

                    System.Net.HttpWebResponse res = req.GetResponse() as System.Net.HttpWebResponse;

                    System.IO.Stream stream = res.GetResponseStream();

                    System.IO.MemoryStream memoryStream = new System.IO.MemoryStream();

                    byte[] buffer = new byte[32 * 1024];

                    int bytes;

                    while ((bytes = stream.Read(buffer, 0, buffer.Length)) > 0)

                    {

                        memoryStream.Write(buffer, 0, bytes);

                    }

                    byte[] imgBytesIn = memoryStream.GetBuffer();

                    res.Close();

                    memoryStream.Dispose();