/* == 如何使用 jUdpServer ================================================================
1. 將該程式 namespace 改成與主程式相同命名空間
2. 於主程式 :
2.1. 定義一個 UDP Server 欄位:
jUdpServer jUDP_Server;
2.2. 建一個事件處理程序,來處理 UdpReceived 事件
private void DoUdpReceived(object sender, UdpEventArgs e)
{
Byte[] bytes = jUdpServer.StreamToBytes(e.MSG);
//.. Show UDP MSG ..//
StringBuilder sb = new StringBuilder();
sb.AppendLine(BitConverter.ToString(bytes));
txtUdpView.Text += sb.ToString();
}
2.3. 建一個 Function 來啟動與監聽 UDP 如下:
private void UDP_StartListen(object sender)
{
// NPortUDP = new jUdpServer(sender, txtIP.Text, Convert.ToInt16(txtPort.Text));
jUDP_Server = new jUdpServer(sender, Convert.ToInt16(txtLocalPort.Text));
jUDP_Server.UdpReceived += DoUdpReceived; //..指定 UdpReceived 事件處理程序
jUDP_Server.StartListen();
}
3. 內已包含 UDP-Send 函式,
函式結構 : UDP_Send(String RemoteIP, int RemotePort, byte[] TxBuffer, int ByteCount);
用法如下:
byte[] bytes = new byte[1,2,3,....,9];
jUDP_Server.UDP_Send("192.168.100.100", 4001, bytes, 5);
======================================================================================*/
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Net;
using System.Net.Sockets;
using System.IO;
using System.Threading;
namespace MyUdpServer
{
/// <summary>
/// 事件委派宣告
/// </summary>
public delegate void UdpEventHandler(object sender, UdpEventArgs e);
// public delegate void AlarmSummeryEventHandler(object sender, AlarmSummeryEventArgs e);
public class jUdpServer
{
#region Client端 方法
Socket m_SocketClient = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
IPAddress m_RemoteAddress = new IPAddress(0);
public int UDP_Send(String RemoteIP, int RemotePort, byte[] TxBuffer, int ByteCount)
{
//("遠端IP位置 : ");
// IPAddress m_RemoteAddress = IPAddress.Parse(RemoteIP) ;
// if (m_RemoteAddress != null)
if (IPAddress.TryParse(RemoteIP, out m_RemoteAddress))
{
/*初始化IPEndPoint物件,表示要連結的遠端IP位置和Port號*/
EndPoint m_IPPoint = new IPEndPoint(m_RemoteAddress, RemotePort);
try
{
/*送出訊息*/
m_SocketClient.SendTo(TxBuffer, m_IPPoint);
return (0);
}
catch
{
return (-1);
}
}
return (-1);
}
#endregion
#region 公用程式 Bytes、Stream 轉換
/// <summary>
/// 將 Byte陣列 轉為 Stream
/// </summary>
/// <returns>Stream</returns>
public static Stream BytesToStream(byte[] bytes)
{
Stream stream = new MemoryStream(bytes);
return stream;
}
public static Stream BytesToStream(byte[] bytes, int Length)
{
Stream stream = new MemoryStream(bytes, 0, Length);
return stream;
}
/// <summary>
/// 將 Stream 轉為 Byte陣列
/// </summary>
public static byte[] StreamToBytes(Stream stream)
{
byte[] bytes = new byte[stream.Length];
stream.Read(bytes, 0, bytes.Length);
/*將 stream 指針指向開頭*/
stream.Seek(0, SeekOrigin.Begin);
return bytes;
}
/// <summary>
/// C# byte[]合併
/// </summary>
/// <returns>合併後的Byte[]</returns>
private byte[] CombomBinaryArray(byte[] srcArray1, byte[] srcArray2)
{
//根据要合併的两Byte[]數量新建一個Byte[]
byte[] newArray = new byte[srcArray1.Length + srcArray2.Length];
Array.Copy(srcArray1, 0, newArray, 0, srcArray1.Length);
Array.Copy(srcArray2, 0, newArray, srcArray1.Length, srcArray2.Length);
return newArray;
}
#endregion
/* 建構式 */
public jUdpServer(object Owner, string IP, int APort)
{
mOwner = Owner;
ServerPort = APort;
ServerIP = IP;
}
public jUdpServer(object Owner, int APort)
{
mOwner = Owner;
ServerPort = APort;
ServerIP = "0.0.0.0";
}
~jUdpServer()
{
try { mSocketServer.Disconnect(true); }
catch { }
try { mSocketServer.Close(); }
catch { }
}
/* 欄位 */
// private bool mEnabled = false;
private SetUdpReceived mSetUdpReceivedDlg; // 委派欄位
private object mOwner; // 儲存擁有者
private byte[] mRecvBuffer = new byte[10240]; // 接收資料的緩衝區
private int mRecvBufferSize = 10240; // 接收資料的緩衝區大小
private EndPoint mRemotePoint = new IPEndPoint(IPAddress.Any, 0); // 初始化遠端IP和 Port端點物件
private Socket mSocketServer;// = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp); // 本機端 Socket物件
/* 屬性 */
public string ServerIP { get; set; }
public int ServerPort { get; set; }
//public bool Enabled
//{
// get { return mEnabled; }
// set
// {
// StartListen();
// mEnabled = value;
// }
//}
public int RecvBufferSize
{
get { return mRecvBufferSize; }
set
{
if (mRecvBufferSize != value)
{
mRecvBuffer = new byte[value];
mRecvBufferSize = value;
}
}
}
/* 方法 */
private void DoUdpReceivedText(Stream msg, IPEndPoint ipend)// 委派處理函式
{
UdpEventArgs e = new UdpEventArgs(msg, ipend);
if (UdpReceived != null) //. 當事件變數不為 null 則執行之
{
UdpReceived(this, e);
}
}
private void EndRecvCallBack(IAsyncResult result)// 非同步接收資料的回呼
{
try
{
/*傳回非同步物件*/
Socket mResultSocket = result.AsyncState as Socket;
/*呼叫 EndReceiveFrom 非同步接收*/
int mRecvBytes = mResultSocket.EndReceiveFrom(result, ref mRemotePoint);
/*將資料置入Stream */
Stream mStream = BytesToStream(mRecvBuffer, mRecvBytes);
/* Invoke */
((System.Windows.Forms.Control)mOwner).Invoke(
mSetUdpReceivedDlg,
mStream,
(IPEndPoint)mRemotePoint
); //.. List<byte>
}
catch (Exception ex)
{
//((System.Windows.Forms.Control)m_Owner).Invoke(m_SetUdpReceivedDlg, ex.Message); //??????
}
finally
{
/*重新呼叫非同步接收*/
mSocketServer.BeginReceiveFrom(
mRecvBuffer,
0,
mRecvBuffer.Length,
SocketFlags.None,
ref mRemotePoint,
new AsyncCallback(EndRecvCallBack),
mSocketServer
);
}
}
public void StartListen()
{
// 開啟伺服器的 "ServerPort" 連接埠，用來接收任何傳送到本機的訊息。
//IPEndPoint ipep = new IPEndPoint(IPAddress.Any, ServerPort);
IPEndPoint ipep = new IPEndPoint(IPAddress.Parse(ServerIP), ServerPort);
// 建立接收的 Socket，並使用 Udp 的 Datagram 方式接收。
mSocketServer = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
// 綁定 Socket (newsock) 與 IPEndPoint (ipep)，讓 Socket 接收 4001 埠的訊息。
mSocketServer.Bind(ipep);
mSetUdpReceivedDlg = DoUdpReceivedText; /*設定委派處理函式*/
//..啟動非同步接受資料
mSocketServer.BeginReceiveFrom(
mRecvBuffer,
0,
mRecvBuffer.Length,
SocketFlags.None,
ref mRemotePoint,
new AsyncCallback(EndRecvCallBack),
mSocketServer
);
}
/* 簽章 */
private delegate void SetUdpReceived(Stream msg, IPEndPoint ipend);// 委派宣告
/* 事件 */
public event UdpEventHandler UdpReceived; // UDP Received 事件
}
/// <summary>
/// 定義專用事件參數類別
/// </summary>
public class UdpEventArgs : EventArgs
{
private IPEndPoint mIpEndPoint = new IPEndPoint(IPAddress.Any, 0);
private Stream mMSG = new MemoryStream();
public UdpEventArgs(Stream msg, IPEndPoint ipend)
{
MSG = msg;
mIpEndPoint.Address = ipend.Address;
mIpEndPoint.Port = ipend.Port;
}
public IPEndPoint EndPoint
{
get { return mIpEndPoint; }
private set { mIpEndPoint = value; }
}
public Stream MSG
{
get { return mMSG; }
private set { mMSG = value; }
}
}
}
