using?System;
using?System.Collections.Generic;
using?System.ComponentModel;
using?System.Data;
using?System.Drawing;
using?System.Linq;
using?System.Text;
using?System.Windows.Forms;
using?System.Net.Sockets;
using?System.Net;
using?System.Threading;

namespace?UdpChatExample
{
????public?partial?class?FormMain?:?Form
????{
????????///?

????????///?接收用
????????///?

????????private?UdpClient?receiveUdpClient;
????????///?

????????///?發送用
????????///?

????????private?UdpClient?sendUdpClient;
????????///?

????????///?和本機綁定的端口號
????????///?

????????private?const?int?port?=?8889;
????????///?

????????///?本機IP
????????///?

????????IPAddress?ip;
????????///?

????????///?遠程主機IP
????????///?

????????IPAddress?remoteIp;
????????public?FormMain（）
????????{
????????????InitializeComponent（）;
????????????//獲取本機可用IP地址
????????????IPAddress[]?ips?=?Dns.GetHostAddresses（Dns.GetHostName（））;
????????????foreach?（IPAddress?ipa?in?ips）
????????????{
????????????????if?（ipa.AddressFamily?==?AddressFamily.InterNetwork）
????????????????{
????????????????????ip?=?ipa;
????????????????????break;
????????????????}
????????????}
????????????//為了在同一臺機器調試，此IP也作為默認遠程IP
????????????remoteIp?=?ip;
????????????txt_IPAddress.Text?=?remoteIp.ToString（）;
????????????txt_Send.Text?=?“你好！“;
????????}

????????private?void?FormMain_Load（object?sender?EventArgs?e）
????????{
????????????//創建一個縣城接收遠程主機發來的信息
????????????Thread?myThread?=?new?Thread（ReceiveData）;
????????????myThread.IsBackground?=?true;
????????????myThread.Start（）;
????????????txt_Send.Focus（）;
????????}

????????///?

????????///?接收數據
????????///?

????????private?void?ReceiveData（）
????????{
????????????IPEndPoint?local?=?new?IPEndPoint（ip?port）;
????????????receiveUdpClient?=?new?UdpClient（local）;
????????????IPEndPoint?remote?=?new?IPEndPoint（IPAddress.Any?0）;
????????????while?（true）
????????????{
????????????????try
????????????????{
????????????????????//關閉udpClient?時此句會產生異常
????????????????????byte[]?receiveBytes?=?receiveUdpClient.Receive（ref?remote）;
????????????????????string?receiveMessage?=?Encoding.Unicode.GetString（
????????????????????????receiveBytes?0?receiveBytes.Length）;
????????????????????AddItem（lst_Receive?string.Format（“來自{0}:{1}“?remote?receiveMessage））;
????????????????}
????????????????catch
????????????????{
????????????????????break;
????????????????}
????????????}
????????}

????????private?void?button1_Click（object?sender?EventArgs?e）
????????{
????????????remoteIp?=?IPAddress.Parse（txt_IPAddress.Text）;
????????????Thread?myThread?=?new?Thread（SendMessage）;
????????????myThread.IsBackground?=?true;
????????????myThread.Start（txt_Send.Text）;
????????}

????????///?

????????///?發送消息
????????///?

????????///?
????????private?void

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件???????4745??2011-08-09?03:08??UdpChatExample\UdpChatExample\Backup\FormMain.cs

?????文件???????6781??2011-08-09?02:02??UdpChatExample\UdpChatExample\Backup\FormMain.Designer.cs

?????文件???????5814??2011-08-09?02:02??UdpChatExample\UdpChatExample\Backup\FormMain.resx

?????文件????????498??2011-08-09?01:49??UdpChatExample\UdpChatExample\Backup\Program.cs

?????文件???????1378??2011-08-09?01:41??UdpChatExample\UdpChatExample\Backup\Properties\AssemblyInfo.cs

?????文件???????2878??2011-08-09?01:41??UdpChatExample\UdpChatExample\Backup\Properties\Resources.Designer.cs

?????文件???????5612??2011-08-09?01:41??UdpChatExample\UdpChatExample\Backup\Properties\Resources.resx

?????文件???????1099??2011-08-09?01:41??UdpChatExample\UdpChatExample\Backup\Properties\Settings.Designer.cs

?????文件????????249??2011-08-09?01:41??UdpChatExample\UdpChatExample\Backup\Properties\Settings.settings

?????文件???????3754??2011-08-09?02:09??UdpChatExample\UdpChatExample\Backup\UdpChatExample.csproj

?????文件??????12288??2015-06-30?16:06??UdpChatExample\UdpChatExample\bin\Debug\UdpChatExample.exe

?????文件??????30208??2015-06-30?16:06??UdpChatExample\UdpChatExample\bin\Debug\UdpChatExample.pdb

?????文件??????11608??2015-06-30?16:06??UdpChatExample\UdpChatExample\bin\Debug\UdpChatExample.vshost.exe

?????文件????????490??2010-03-17?22:39??UdpChatExample\UdpChatExample\bin\Debug\UdpChatExample.vshost.exe.manifest

?????文件??????16553??2011-08-09?02:55??UdpChatExample\UdpChatExample\bin\Debug.rar

?????文件???????4745??2011-08-09?03:08??UdpChatExample\UdpChatExample\FormMain.cs

?????文件???????6781??2011-08-09?02:02??UdpChatExample\UdpChatExample\FormMain.Designer.cs

?????文件???????5814??2011-08-09?02:02??UdpChatExample\UdpChatExample\FormMain.resx

?????文件???????6055??2015-06-30?16:08??UdpChatExample\UdpChatExample\obj\Debug\DesignTimeResolveAssemblyReferencesInput.cache

?????文件????????722??2015-06-30?16:06??UdpChatExample\UdpChatExample\obj\Debug\GenerateResource-ResGen.read.1.tlog

?????文件????????658??2015-06-30?16:06??UdpChatExample\UdpChatExample\obj\Debug\GenerateResource-ResGen.write.1.tlog

?????文件???????4608??2015-06-30?16:06??UdpChatExample\UdpChatExample\obj\Debug\TempPE\Properties.Resources.Designer.cs.dll

?????文件???????1509??2015-06-30?16:13??UdpChatExample\UdpChatExample\obj\Debug\UdpChatExample.csproj.FileListAbsolute.txt

?????文件????????850??2011-08-09?02:09??UdpChatExample\UdpChatExample\obj\Debug\UdpChatExample.csproj.GenerateResource.Cache

?????文件??????12288??2015-06-30?16:06??UdpChatExample\UdpChatExample\obj\Debug\UdpChatExample.exe

?????文件????????180??2015-06-30?16:06??UdpChatExample\UdpChatExample\obj\Debug\UdpChatExample.FormMain.resources

?????文件??????30208??2015-06-30?16:06??UdpChatExample\UdpChatExample\obj\Debug\UdpChatExample.pdb

?????文件????????180??2015-06-30?16:06??UdpChatExample\UdpChatExample\obj\Debug\UdpChatExample.Properties.Resources.resources

?????文件????????498??2011-08-09?01:49??UdpChatExample\UdpChatExample\Program.cs

?????文件???????1378??2011-08-09?01:41??UdpChatExample\UdpChatExample\Properties\AssemblyInfo.cs

............此處省略26個文件信息