WebService调用Socket问题
首先写Socket的方法
public static void CommunicateToCrossServer(string GroupServerIPAddr, int GroupServerIPPort, byte[] SendData, ref byte[] ReceiveData, ref int ReceiveDataLen, ref string errorStr)

在写WebService
/// <summary>
  /// 和道口通信服务器通信
  /// </summary>
  /// <param name="GroupServerIPAddr">输入参数：通信服务器地址</param>
  /// <param name="GroupServerIPPort">输入参数：通信服务器端口号</param>
  /// <param name="SendData">输入参数：发送了注册信息</param>
  /// <param name="ReceiveData">输出参数：接收数据byte[]</param>
  /// <param name="ReceiveDataLen">输出参数：接收数据长度</param>
  /// <param name="errorStr">输出参数：出错信息</param>
  [WebMethod]
  public void CommunicateToCrossServer(string GroupServerIPAddr, int GroupServerIPPort, byte[] SendData, ref byte[] ReceiveData, ref int ReceiveDataLen, ref string errorStr)
  {
  Domain.CommunicateToGroupServer.CommunicateToCrossServer(GroupServerIPAddr, GroupServerIPPort, SendData, ref ReceiveData, ref ReceiveDataLen, ref errorStr);
  }

前台程序：
如果直接调用CommunicateToCrossServer程序正常；
Domain.CommunicateToGroupServer.CommunicateToCrossServer(GroupServerIPAddr, GroupServerIPPort, SendData, ref ReceiveData, ref ReceiveDataLen, ref errorStr);这是正常！

但是通过Webservice调用CommunicateToCrossServer发现返回的数据全部为0，也就是ReceiveData数组里面的值全部为0；不知道哪里出了问题？
//通过WebService通信
WebServiceToCommunication.Service1SoapClient w = new RailwayCross2011.AppForServer.WebServiceToCommunication.Service1SoapClient();
w.CommunicateToCrossServer(GroupServerIPAddr, GroupServerIPPort, SendData, ref ReceiveData, ref ReceiveDataLen, ref errorStr);
这个出错，ReceiveData数组里面的值全部为0；



下面是CommunicateToCrossServer方法：
public static void CommunicateToCrossServer(string GroupServerIPAddr, int GroupServerIPPort, byte[] SendData, ref byte[] ReceiveData, ref int ReceiveDataLen, ref string errorStr)
  {
  IPHostEntry ipHostInfo = Dns.Resolve(GroupServerIPAddr);
  IPAddress ipAddress = ipHostInfo.AddressList[0];
  IPEndPoint remoteEP = new IPEndPoint(ipAddress, GroupServerIPPort);
  ReceiveDataLen = 0;
  errorStr = "";
  //创建一个基于TCP的Socket
  Socket client = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
  try
  {
  //尝试连接 
  client.Connect(remoteEP);
  }
  catch (Exception se)
  {
  errorStr = "连接错误" + se.Message;
  return;
  }
  try
  {
  //向主机发送请求 
  client.Send(SendData, SendData.Length, 0);
  }
  catch (Exception ce)
  {
  errorStr = "发送错误:" + ce.Message;
  }
  int bytes = 0;
  try
  {  
  List<byte[]> tempList = new List<byte[]>();
  while (true)
  {
  byte[] temp = new byte[1024];
  //每次读取1024
  bytes = client.Receive(temp, 1024, 0);
  if (bytes <= 0)
  {