/// <summary>
        /// 返回?cái)z像頭信息
        /// </summary>
        private void RcvCameraInfos(object obj)
        {
            string sourceIp = System.Configuration.ConfigurationSettings.AppSettings["SourceIP"].ToString();
            string sourcePort = System.Configuration.ConfigurationSettings.AppSettings["SourcePort"].ToString();
 
            Socket mysocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
            IPEndPoint ipEndPoint = new IPEndPoint(IPAddress.Parse(sourceIp), int.Parse(sourcePort));
            mysocket.Connect(ipEndPoint);
 
            DateTime start = DateTime.Now;
 
            string s = "<?xml version=\"1.0\" ?>";
            s += "<info  name=\"getcameracodematrixtable\"/>\0";
            byte[] buffer = System.Text.ASCIIEncoding.GetEncoding("GB2312").GetBytes(s);
            mysocket.Send(buffer);
 
            Action<string> OnCamraInfoRcvCompleted = obj as Action<string>;
             
            int recvsize = 0;
            int dataSize = 2048 * 1000;
            int ret = 0;
            byte[] datas = new byte[dataSize];
            SortedList<string, string[]> cameraDictionnary = new SortedList<string, string[]>();
            string xmlString = "";
            while (recvsize < dataSize)
            {
                ret = mysocket.Receive(datas, recvsize, dataSize - recvsize, SocketFlags.None);
                if (ret <= 0)
                {                   
                    break;
                }                  
                recvsize += ret;
                if (datas[recvsize - 1] == 0)
                {                   
                    break;
                }
                if (recvsize >= dataSize)
                {
                    byte[] buff2 = new byte[dataSize + 1024];
                    datas.CopyTo(buff2,0);
                    datas = buff2;
                    dataSize += 1024;               
                }
            }
            xmlString = System.Text.ASCIIEncoding.GetEncoding("GB2312").GetString(datas, 0, recvsize - 1);
            DateTime end = DateTime.Now;
            TimeSpan span = end - start;
            System.Windows.MessageBox.Show("總共花費(fèi)時(shí)間："+span.TotalSeconds.ToString()+"秒");
            this._videoSourceXmlString = xmlString;
            if (cameraDictionnary != null)
            {
                if (OnCamraInfoRcvCompleted != null) OnCamraInfoRcvCompleted(xmlString);
            }
        }

private void SaveCurrentInfoToXML(string recevInfo)
       {
           string filePath=System.AppDomain.CurrentDomain.BaseDirectory+"CameraInfo.xml";
           XmlDocument xd = new XmlDocument();
           if (File.Exists(filePath))
           {
               xd.Load(filePath);              
           }
           else
           {
               XmlDeclaration xmlDec;
               XmlElement xmlEle;
               xmlDec = xd.CreateXmlDeclaration("1.0","UTF-8",null);
               xd.AppendChild(xmlDec);
               xmlEle = xd.CreateElement("Info");
               xd.AppendChild(xmlEle);
           }
           xd.LoadXml(recevInfo);
           XmlTextWriter xtw = new XmlTextWriter(filePath, Encoding.UTF8);
           xtw.Formatting = Formatting.Indented;
           xd.Save(xtw);
            
            
       }