using?System;
using?System.Collections.Generic;
using?System.Linq;
using?System.Text;
using?System.Net;
using?System.Net.Sockets;

namespace?NBC.Test.objectModel
{
????///?

????///?組播通信類
????///?

????public?class?SocketUDP
????{
????????///?

????????///?組播模式發送信息
????????///?

????????///?
????????public?void?SendMessage（object?obj）
????????{
????????????//定義消息格式
????????????//日期_/時間_/活動時長_/指標_/出課教師_/班級_/學科_/課題_/ClassID
????????????Activityobject?mess?=?（（Operateobject）obj）.Acobject;//此代碼是我自定義的消息對象，使用時可按照自己需求從新定義
????????????IPAddress?GroupAddress?=?IPAddress.Parse（“234.168.100.2“）;?//此IP值為固定區間?詳情請查詢msdn
????????????int?GroupPort?=?11000;
????????????UdpClient?sender?=?new?UdpClient（）;
????????????IPEndPoint?groupEP?=?new?IPEndPoint（GroupAddress?GroupPort）;
????????????sender.EnableBroadcast?=?true;
????????????try
????????????{
????????????????byte[]?bytes?=?UTF8Encoding.UTF8.GetBytes（mess.Date?+?“_/“?+?mess.Time?+?“_/“?+?mess.ActivityLength?+?“_/“?+?mess.Index?+?“_/“?+?mess.Techer?+?“_/“?+?mess.Grade?+?“_/“?+?mess.Subject?+?“_/“?+?mess.Project?+?“_/“?+?mess.ClassID）;
????????????????sender.Send（bytes?bytes.Length?groupEP）;
????????????????//sender.Close（）;
????????????}
????????????catch
????????????{

????????????}
????????}
????????//創建一個UdpClient實例??
????????private?Socket?udpReceive;??
????????///?

????????///?接收組播信息
????????///?

????????private?void?ReceiveMessage（）
????????{
???