PDA上一个UDP通讯客户端

放了个TEXTBOX输入,TEXTBOX多行来记录日志(其实可以简单的用LISTBOX)

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.IO;
using System.Xml;
using System.Net;
using System.Threading;
using System.Net.Sockets;

namespace UDPClient
{
    public partial class FrmMain : Form
    {
        private FrmSetup _setup;  //设置远程服务器IP
        private UdpClient _udpSend;
        private UdpClient _udpReceive;
        private Thread _receive;
        public delegate void UpdateMsg(String Msg);
        public delegate void SendMsg(String Msg);
        public UpdateMsg myDelegate;
        public SendMsg mySendMsg;

        public void UpdateMsgMethod(String Msg)
        {

            if (Msg.Length == 0)
            {

                Msg = "\"空\"\r\n";
                //tBResult.AppendText("\"空\"\r\n");


            }
                tBResult.Text = tBResult.Text + Msg;
                tBResult.SelectionStart = tBResult.TextLength - Msg.Length;
            
            
            tBResult.SelectionLength = 0;
            tBResult.ScrollToCaret();   
            
        }

        private void Connect(string ServerIP, Int32 ServerPort)
        {
            try
            {
                _udpSend.Connect(ServerIP, ServerPort);
            }
            catch (Exception ex)
            {
                UpdateMsgMethod( "异常:" + ex.Message.ToString() + "\r\n");
            }
        }


        private void Send(string Msg)
        {
            byte[] sendBytes = Encoding.ASCII.GetBytes(Msg);

            try
            {


                _udpSend.Send(sendBytes, sendBytes.Length);
            }
            catch (Exception ex)
            {

                UpdateMsgMethod("异常:" + ex.Message.ToString() + "\r\n");
            }

        }

        private void ThreadPro()
        {



            try
            {
                IPEndPoint remotePoint = new IPEndPoint(IPAddress.Any, 0);
                Byte[] receiveBytes;
                while (true)
                {
                    receiveBytes = _udpReceive.Receive(ref remotePoint);

                    string returnData = Encoding.ASCII.GetString(receiveBytes, 0, receiveBytes.Length);

                    //tBResult.Text = tBResult.Text + "收到：\"" + returnData + "\"\r\n";
                    if (returnData == "<RETURNSTATE/>")//服务器获取状态的特色命令
                    {
                        this.Invoke(this.mySendMsg, new object[] { "<RETURNOK/>" });//获取状态
                    }
                    else
                    {


                        returnData = "收到：\"" + returnData + "\"\r\n";
                        this.Invoke(this.myDelegate, new object[] { returnData });
                    }
                }
            }
            catch (Exception ex)
            {

                //tBResult.Text = tBResult.Text + ex.Message.ToString() + "\r\n";
                this.Invoke(this.myDelegate, new object[] {"异常:"+ ex.Message.ToString() + "\r\n" });
            }


        }

        public FrmMain()
        {
            InitializeComponent();
            _setup = new FrmSetup();
            _udpSend = new UdpClient();
            _udpReceive = new UdpClient(10120);
            _receive = new Thread(new ThreadStart(ThreadPro));
            myDelegate = new UpdateMsg(UpdateMsgMethod);
            mySendMsg = new SendMsg(Send);
        }

        private void menuItem3_Click(object sender, EventArgs e)
        {
            Close();
        }

        private void menuItem2_Click(object sender, EventArgs e)
        {
            _setup.ShowDialog();
            Close();
        }

        private void FrmMain_Load(object sender, EventArgs e)
        {
            if (File.Exists("setup.xml"))
            {
                //MessageBox.Show("setup.xml");
                XmlReader _rdoc = XmlReader.Create("setup.xml");
                if (!_rdoc.EOF)
                {
                    //MessageBox.Show(_rdoc.ReadElementString());
                    _setup.ServerIP = _rdoc.ReadElementString();  //服务器IP
                    //MessageBox.Show(_setup.ServerIP);
                    lbServer.Text = "Server:"+ _setup.ServerIP;
                    Connect(_setup.ServerIP, 4660);
                    _receive.Start();
                    tBMsg.SelectAll();
                    tBMsg.Focus();

                }
                _rdoc.Close();
            }
            else
            {
                _setup.ServerIP = "";
                _setup.ShowDialog();
                Close();
            }
        }

        private void tBMsg_KeyPress(object sender, KeyPressEventArgs e)
        {
            if (e.KeyChar == (char)Keys.Enter)
            {
                //MessageBox.Show(tBMsg.Text);
                Send(tBMsg.Text);
                tBMsg.SelectAll();
                tBMsg.Focus();
            }
        }

        private void FrmMain_Closing(object sender, CancelEventArgs e)
        {
            _receive.Abort();//必须关闭,否则端口会一直被占用.在虚拟机上看不出的
            _udpReceive.Close();
            _udpSend.Close();
        }

 
 


    }
}