C# 在客户端之间发送消息（套接字UDP）
我是C#新手，正在练习Socket编程 首先，我为客户端创建了一个服务器连接到它 服务器：C# 在客户端之间发送消息（套接字UDP）,c#,sockets,C#,Sockets,我是C#新手，正在练习Socket编程 首先，我为客户端创建了一个服务器连接到它 服务器： class Program { static void Main(string[] args) { int recv; byte[] data = new byte[1024]; IPEndPoint ipep = new IPEndPoint(IPAddress.Any, 1900); Socket newsock = new S
class Program {
static void Main(string[] args) {
int recv;
byte[] data = new byte[1024];
IPEndPoint ipep = new IPEndPoint(IPAddress.Any, 1900);
Socket newsock = new Socket(AddressFamily.InterNetwork,
SocketType.Dgram, ProtocolType.Udp);
newsock.Bind(ipep);
Console.WriteLine("Waiting for a client...");
IPEndPoint sender = new IPEndPoint(IPAddress.Any, 0);
EndPoint Remote = (EndPoint)(sender);
recv = newsock.ReceiveFrom(data, ref Remote);
Console.WriteLine("Message received from {0}:", Remote.ToString());
Console.WriteLine(Encoding.ASCII.GetString(data, 0, recv));
string welcome = "Welcome to my test server";
data = Encoding.ASCII.GetBytes(welcome);
newsock.SendTo(data, data.Length, SocketFlags.None, Remote);
while (true) {
data = new byte[1024];
recv = newsock.ReceiveFrom(data, ref Remote);
Console.WriteLine(Encoding.ASCII.GetString(data, 0, recv));
newsock.SendTo(data, recv, SocketFlags.None, Remote);
}
}
}
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;
using System.Net.Sockets;
namespace serverUDPWF {
public partial class ServerForm : Form {
byte[] data = new byte[30];
string input = "";
string stringData = "";
IPEndPoint iep,sender;
Socket server;
string welcome = "";
int recv;
EndPoint tmpRemote;
public ServerForm() {
InitializeComponent();
startServer();
}
public void startServer() {
iep = new IPEndPoint(
IPAddress.Parse("127.0.0.1"), 1900);
server = new Socket(AddressFamily.InterNetwork,
SocketType.Dgram, ProtocolType.Udp);
welcome = "Hello, are you there?";
data = Encoding.ASCII.GetBytes(welcome);
server.SendTo(data, data.Length, SocketFlags.None, iep);
sender = new IPEndPoint(IPAddress.Any, 0);
tmpRemote = (EndPoint)sender;
data = new byte[30];
recv = server.ReceiveFrom(data, ref tmpRemote);
Console.WriteLine();
listBox1.Items.Add("Message received from {0}:" + tmpRemote.ToString());
listBox1.Items.Add(Encoding.ASCII.GetString(data, 0, recv));
}
private void sendMessageToserver(object sender, EventArgs e) {
if (textBox2.Text == "") {
MessageBox.Show("Please Enter Your Name");
}
else {
int i = 30;
input = textBox2.Text + ": " + textBox1.Text;
if (input == "exit") {
this.Close();
}
server.SendTo(Encoding.ASCII.GetBytes(input), tmpRemote);
textBox1.Text = "";
data = new byte[i];
try {
recv = server.ReceiveFrom(data, ref tmpRemote);
stringData = Encoding.ASCII.GetString(data, 0, recv);
listBox1.Items.Add(stringData);
}
catch (SocketException) {
listBox1.Items.Add("WARNING: data lost, retry message.");
i += 10;
}
}
}
}
}
我如何才能做到这一点？多播udp通信。。我只是想尝试一下，如果有什么不对劲，请随意分享 客户端：
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;
using System.Net.Sockets;
using System.Collections;
using System.Threading;
namespace Myclient
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
CheckForIllegalCrossThreadCalls = false;
}
Socketsending socketsending;
string multicastIP = string.Empty;
int multicastPort = 0;
int clientPort = 0;
string clientSysname = string.Empty;
string Nodeid = string.Empty;
string clientIP = string.Empty;
string recievedText = string.Empty;
string sendingText = string.Empty;
IPAddress ipAddress;
IPEndPoint ipEndpoint;
UdpClient udpClient;
string[] splitRecievedText;
byte[] byteRecieve;
private void Form1_Load(object sender, EventArgs e)
{
Random _random = new Random();
multicastIP = "224.5.6.7";
multicastPort = 5000;
Nodeid = "node" + _random.Next(1000, 9999);
clientPort = _random.Next(1000, 9999);
clientSysname = Dns.GetHostName();
ipAddress = Dns.GetHostEntry(clientSysname).AddressList.FirstOrDefault
(addr => addr.AddressFamily.Equals(AddressFamily.InterNetwork));
ipEndpoint = new IPEndPoint(ipAddress, clientPort);
clientIP = ipAddress.ToString();
label1.Text = "Node id: " + Nodeid;
label2.Text = "Host Name: " + clientSysname;
Thread threadMain = new Thread(connect);
threadMain.Start();
threadMain = new Thread(receive);
threadMain.Start();
}
void connect()
{
socketsending = new Socketsending();
sendingText = "connect@" + clientSysname + "#" + clientIP + "#" + clientPort + "#" + Nodeid + "#";
socketsending.send(multicastIP, multicastPort, sendingText);
}
void receive()
{
udpClient = new UdpClient(clientPort);
while (true)
{
IPEndPoint _ipendpoint = null;
byteRecieve = udpClient.Receive(ref _ipendpoint);
recievedText = Encoding.ASCII.GetString(byteRecieve);
splitRecievedText = recievedText.Split('@');
if (splitRecievedText[0] == "stop")
{
}
}
}
private void button1_Click(object sender, EventArgs e)
{
sendingText = "message@" + Nodeid + '$' + textBox1.Text + '$';
socketsending.send(multicastIP, multicastPort, sendingText);
}
}
}
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;
using System.Net.Sockets;
using System.Threading;
using System.IO;
using System.Collections;
namespace Myserver
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
CheckForIllegalCrossThreadCalls = false;
}
string multicastip = string.Empty;
string serversystemname = string.Empty;
string receiveddata = string.Empty;
string nodeinfo = string.Empty;
string clientHostName = string.Empty;
string clientIP = string.Empty;
string Nodeid = string.Empty;
int multicastport = 0;
int clientport = 0;
DataTable datatable;
DataTable dataTableAddRemove;
string[] splitReceived;
string[] splitnodeinfo;
Socket socket;
IPAddress ipaddress;
IPEndPoint ipendpoint;
byte[] bytereceive;
Dictionary<string, string> dictionarytable;
public delegate void updategrid();
private void Form1_Load(object sender, EventArgs e)
{
multicastip = "224.5.6.7";
multicastport = 5000;
serversystemname = Dns.GetHostName();
datatable = new DataTable();
datatable.Columns.Add("HostName");
datatable.Columns.Add("Nodeid");
datatable.Columns.Add("ipaddress");
datatable.Columns.Add("portnumber");
DGV.DataSource = datatable;
Thread threadreceive = new Thread(receiver);
threadreceive.Start();
}
void receiver()
{
dictionarytable = new Dictionary<string, string>();
socket = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
ipendpoint = new IPEndPoint(IPAddress.Any, multicastport);
socket.Bind(ipendpoint);
ipaddress = IPAddress.Parse(multicastip);
socket.SetSocketOption(SocketOptionLevel.IP, SocketOptionName.AddMembership, new MulticastOption(ipaddress, IPAddress.Any));
while (true)
{
bytereceive = new byte[4200];
socket.Receive(bytereceive);
receiveddata = Encoding.ASCII.GetString(bytereceive, 0, bytereceive.Length);
splitReceived = receiveddata.Split('@');
if (splitReceived[0].ToString() == "connect")
{
nodeinfo = splitReceived[1].ToString();
connect();
}
else if (splitReceived[0].ToString() == "Disconnect")
{
nodeinfo = splitReceived[1].ToString();
Thread threadDisconnect = new Thread(disconnect);
threadDisconnect.Start();
}
else if (splitReceived[0].ToString() == "message")
{
string[] str = splitReceived[1].Split('$');
listBox1.Items.Add(str[0] + " -> " + str[1]);
}
}
}
void connect()
{
SocketSending socketsending = new SocketSending();
int count = 0;
splitnodeinfo = nodeinfo.Split('#');
clientHostName = splitnodeinfo[0].ToString();
clientIP = splitnodeinfo[1].ToString();
clientport = Convert.ToInt32(splitnodeinfo[2].ToString());
Nodeid = splitnodeinfo[3].ToString();
if (!dictionarytable.ContainsKey(Nodeid))
{
count++;
dictionarytable.Add(Nodeid, clientIP + "#" + clientport + "#" + clientHostName);
dataTableAddRemove = (DataTable)DGV.DataSource;
DataRow dr = dataTableAddRemove.NewRow();
dr["Nodeid"] = Nodeid;
dr["HostName"] = clientHostName;
dr["IPAddress"] = clientIP;
dr["portNumber"] = clientport;
dataTableAddRemove.Rows.Add(dr);
datatable = dataTableAddRemove;
updatenodegrid();
}
}
void disconnect()
{
SocketSending socketsending = new SocketSending();
string removeClient = string.Empty;
splitnodeinfo = nodeinfo.Split('#');
clientHostName = splitnodeinfo[0].ToString();
Nodeid = splitnodeinfo[1].ToString();
dataTableAddRemove = (DataTable)DGV.DataSource;
DataRow[] arrayDataRow = dataTableAddRemove.Select();
for (int i = 0; i < arrayDataRow.Length; i++)
{
string matchGridHostName = arrayDataRow[i]["HostName"].ToString();
if (clientHostName == matchGridHostName)
{
Thread.Sleep(100);
removeClient = clientHostName;
arrayDataRow[i].Delete();
break;
}
}
if (dictionarytable.ContainsKey(removeClient))
{
dictionarytable.Remove(removeClient);
}
}
void updatenodegrid()
{
if (this.DGV.InvokeRequired)
this.DGV.Invoke(new updategrid(updatenodegrid));
else
DGV.DataSource = datatable;
}
private void Form1_FormClosing(object sender, FormClosingEventArgs e)
{
dictionarytable.Clear();
}
}
}
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;
using System.Net.Sockets;
using System.Collections;
using System.Threading;
namespace Myclient
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
CheckForIllegalCrossThreadCalls = false;
}
Socketsending socketsending;
string multicastIP = string.Empty;
int multicastPort = 0;
int clientPort = 0;
string clientSysname = string.Empty;
string Nodeid = string.Empty;
string clientIP = string.Empty;
string recievedText = string.Empty;
string sendingText = string.Empty;
IPAddress ipAddress;
IPEndPoint ipEndpoint;
UdpClient udpClient;
string[] splitRecievedText;
byte[] byteRecieve;
private void Form1_Load(object sender, EventArgs e)
{
Random _random = new Random();
multicastIP = "224.5.6.7";
multicastPort = 5000;
Nodeid = "node" + _random.Next(1000, 9999);
clientPort = _random.Next(1000, 9999);
clientSysname = Dns.GetHostName();
ipAddress = Dns.GetHostEntry(clientSysname).AddressList.FirstOrDefault
(addr => addr.AddressFamily.Equals(AddressFamily.InterNetwork));
ipEndpoint = new IPEndPoint(ipAddress, clientPort);
clientIP = ipAddress.ToString();
label1.Text = "Node id: " + Nodeid;
label2.Text = "Host Name: " + clientSysname;
Thread threadMain = new Thread(connect);
threadMain.Start();
threadMain = new Thread(receive);
threadMain.Start();
}
void connect()
{
socketsending = new Socketsending();
sendingText = "connect@" + clientSysname + "#" + clientIP + "#" + clientPort + "#" + Nodeid + "#";
socketsending.send(multicastIP, multicastPort, sendingText);
}
void receive()
{
udpClient = new UdpClient(clientPort);
while (true)
{
IPEndPoint _ipendpoint = null;
byteRecieve = udpClient.Receive(ref _ipendpoint);
recievedText = Encoding.ASCII.GetString(byteRecieve);
splitRecievedText = recievedText.Split('@');
if (splitRecievedText[0] == "stop")
{
}
}
}
private void button1_Click(object sender, EventArgs e)
{
sendingText = "message@" + Nodeid + '$' + textBox1.Text + '$';
socketsending.send(multicastIP, multicastPort, sendingText);
}
}
}
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;
using System.Net.Sockets;
using System.Threading;
using System.IO;
using System.Collections;
namespace Myserver
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
CheckForIllegalCrossThreadCalls = false;
}
string multicastip = string.Empty;
string serversystemname = string.Empty;
string receiveddata = string.Empty;
string nodeinfo = string.Empty;
string clientHostName = string.Empty;
string clientIP = string.Empty;
string Nodeid = string.Empty;
int multicastport = 0;
int clientport = 0;
DataTable datatable;
DataTable dataTableAddRemove;
string[] splitReceived;
string[] splitnodeinfo;
Socket socket;
IPAddress ipaddress;
IPEndPoint ipendpoint;
byte[] bytereceive;
Dictionary<string, string> dictionarytable;
public delegate void updategrid();
private void Form1_Load(object sender, EventArgs e)
{
multicastip = "224.5.6.7";
multicastport = 5000;
serversystemname = Dns.GetHostName();
datatable = new DataTable();
datatable.Columns.Add("HostName");
datatable.Columns.Add("Nodeid");
datatable.Columns.Add("ipaddress");
datatable.Columns.Add("portnumber");
DGV.DataSource = datatable;
Thread threadreceive = new Thread(receiver);
threadreceive.Start();
}
void receiver()
{
dictionarytable = new Dictionary<string, string>();
socket = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
ipendpoint = new IPEndPoint(IPAddress.Any, multicastport);
socket.Bind(ipendpoint);
ipaddress = IPAddress.Parse(multicastip);
socket.SetSocketOption(SocketOptionLevel.IP, SocketOptionName.AddMembership, new MulticastOption(ipaddress, IPAddress.Any));
while (true)
{
bytereceive = new byte[4200];
socket.Receive(bytereceive);
receiveddata = Encoding.ASCII.GetString(bytereceive, 0, bytereceive.Length);
splitReceived = receiveddata.Split('@');
if (splitReceived[0].ToString() == "connect")
{
nodeinfo = splitReceived[1].ToString();
connect();
}
else if (splitReceived[0].ToString() == "Disconnect")
{
nodeinfo = splitReceived[1].ToString();
Thread threadDisconnect = new Thread(disconnect);
threadDisconnect.Start();
}
else if (splitReceived[0].ToString() == "message")
{
string[] str = splitReceived[1].Split('$');
listBox1.Items.Add(str[0] + " -> " + str[1]);
}
}
}
void connect()
{
SocketSending socketsending = new SocketSending();
int count = 0;
splitnodeinfo = nodeinfo.Split('#');
clientHostName = splitnodeinfo[0].ToString();
clientIP = splitnodeinfo[1].ToString();
clientport = Convert.ToInt32(splitnodeinfo[2].ToString());
Nodeid = splitnodeinfo[3].ToString();
if (!dictionarytable.ContainsKey(Nodeid))
{
count++;
dictionarytable.Add(Nodeid, clientIP + "#" + clientport + "#" + clientHostName);
dataTableAddRemove = (DataTable)DGV.DataSource;
DataRow dr = dataTableAddRemove.NewRow();
dr["Nodeid"] = Nodeid;
dr["HostName"] = clientHostName;
dr["IPAddress"] = clientIP;
dr["portNumber"] = clientport;
dataTableAddRemove.Rows.Add(dr);
datatable = dataTableAddRemove;
updatenodegrid();
}
}
void disconnect()
{
SocketSending socketsending = new SocketSending();
string removeClient = string.Empty;
splitnodeinfo = nodeinfo.Split('#');
clientHostName = splitnodeinfo[0].ToString();
Nodeid = splitnodeinfo[1].ToString();
dataTableAddRemove = (DataTable)DGV.DataSource;
DataRow[] arrayDataRow = dataTableAddRemove.Select();
for (int i = 0; i < arrayDataRow.Length; i++)
{
string matchGridHostName = arrayDataRow[i]["HostName"].ToString();
if (clientHostName == matchGridHostName)
{
Thread.Sleep(100);
removeClient = clientHostName;
arrayDataRow[i].Delete();
break;
}
}
if (dictionarytable.ContainsKey(removeClient))
{
dictionarytable.Remove(removeClient);
}
}
void updatenodegrid()
{
if (this.DGV.InvokeRequired)
this.DGV.Invoke(new updategrid(updatenodegrid));
else
DGV.DataSource = datatable;
}
private void Form1_FormClosing(object sender, FormClosingEventArgs e)
{
dictionarytable.Clear();
}
}
}
使用系统；
使用System.Collections.Generic；
使用系统组件模型；
使用系统数据；
使用系统图；
使用System.Linq；
使用系统文本；
使用System.Windows.Forms；
Net系统；
使用System.Net.Sockets；
使用系统线程；
使用System.IO；
使用系统集合；
名称空间Myserver
{
公共部分类Form1:Form
{
公共表格1（）
{
初始化组件（）；
CheckForIllegalCrossThreadCalls=false；
}
string multicastip=string.Empty；
string serversystemname=string.Empty；
string receiveddata=string.Empty；
string nodeinfo=string.Empty；
string clientHostName=string.Empty；
string clientIP=string.Empty；
string Nodeid=string.Empty；
int多播端口=0；
int clientport=0；
数据表数据表；
DataTable dataTableAddRemove；
接收到字符串[]；
字符串[]splitnodeinfo；
插座；
IPAddress-IPAddress；
IPEndPoint-IPEndPoint；
字节[]bytereceive；
字典表；
公共委托void updategrid（）；
私有void Form1\u加载（对象发送方、事件参数e）
{
multicastip=“224.5.6.7”；
多播端口=5000；
serversystemname=Dns.GetHostName（）；
datatable=新的datatable（）；
datatable.Columns.Add（“主机名”）；
datatable.Columns.Add（“Nodeid”）；
datatable.Columns.Add（“ipaddress”）；
datatable.Columns.Add（“端口号”）；
DGV.DataSource=数据表；
Thread threadreceive=新线程（接收器）；
threadreceive.Start（）；
}
无效接收人（）
{
dictionarytable=新字典（）；
套接字=新套接字（AddressFamily.InterNetwork、SocketType.Dgram、ProtocolType.Udp）；
ipendpoint=新ipendpoint（IPAddress.Any，多播端口）；
套接字绑定（ipendpoint）；
ipaddress=ipaddress.Parse（multicastip）；
socket.SetSocketOption（SocketOptionLevel.IP，SocketOptionName.AddMembership，新的MulticastOption（ipaddress，ipaddress.Any））；
while（true）
{
bytereceive=新字节[4200]；
socket.Receive（bytereceive）；
receiveddata=Encoding.ASCII.GetString（bytereceive，0，bytereceive.Length）；
splitReceived=receiveddata.Split（'@'）；
如果（splitReceived[0].ToString（）=“connect”）
{
nodeinfo=splitReceived[1]。ToString（）；
connect（）；
}
else if（splitReceived[0]。ToString（）=“断开”）
{
nodeinfo=splitReceived[1]。ToString（）；
螺纹断开=新螺纹（断开）；
threadDisconnect.Start（）；
}
else if（splitReceived[0].ToString（）=“消息”）
{
字符串[]str=splitReceived[1]。拆分（“$”）；
listBox1.Items.Add（str[0]+“->”+str[1]）；
}
}
}
void connect（）
{
SocketSending SocketSending=新建SocketSending（）；
整数计数=0；
splitnodeinfo=nodeinfo.Split（“#”）；
clientHostName=splitnodeinfo[0].ToString（）；
clientIP=splitnodeinfo[1].ToString（）；
clientport=Convert.ToInt32（splitnodeinfo[2].ToString（））；
Nodeid=splitnodeinfo[3].ToString（）；
如果（！dictionarytable.ContainsKey（Nodeid））
{
计数++；
添加（Nodeid，clientIP+“#”+clientport+“#”+clientHostName）；
dataTableAddRemove=（DataTable）DGV.DataSource；
DataRow dr=dataTableAddRemove.NewRow（）；
dr[“Nodeid”]=Nodeid；
dr[“HostName”]=clientHostName；
dr[“IPAddress”]=clientIP；
dr[“端口号”]=客户端端口；
dataTableAddRemove.Rows.Add（dr）；
datatable=dataTableAddRemove；
updatenodegrid（）；
}
}
无效断开连接（）
{
SocketSending SocketSending=新建SocketSending（）；
string removeClient=string.Empty；
splitnodeinfo=nodeinfo.Split（“#”）；
clientHostName=splitnodeinfo[0].ToString（）；
Nodeid=splitnodeinfo[1].ToString（）；
dataTableAddRemove=（DataTable）DGV.DataSource；
DataRow[]arrayDataRow=dataTableAddRemove.Select（）；
for（int i=0；i