我在 Visual Studio Windows Forms App(.Net Framework 4) 中有 2 個應用程式我的兩個程式的名稱是：
IpServer
IpClient
我的問題是，當 IpClient 應用程式關閉或停止或 IpServer 應用程式在 messagebox.show("Client Is dissconnect") 中顯示一條訊息時，我不知道該怎么做
ip服務器代碼：
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;
namespace IpServer
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
TcpListener tcplist;
Socket s;
private void init()
{
IPAddress ip = IPAddress.Parse("127.0.0.1");
tcplist = new TcpListener(ip,5050);
tcplist.Start();
while (true)
{
s = tcplist.AcceptSocket();
Thread t = new Thread(new ThreadStart(replay));
t.IsBackground = true;
t.Start();
}
}
private void replay()
{
Socket sc = s;
NetworkStream ns = new NetworkStream(sc);
StreamReader reader = new StreamReader(ns);
StreamWriter writer = new StreamWriter(ns);
string str = "";
string response = "";
try { str = reader.ReadLine(); }
catch { str = "error"; }
if (str == "register")
{
MessageBox.Show("ok");
}
response = "registeredSucss,";
writer.WriteLine(response);
writer.Flush();
ns.Close();
sc.Close();
}
private void button1_Click(object sender, EventArgs e)
{
Thread t = new Thread(new ThreadStart(init));
t.IsBackground = true;
t.Start();
MessageBox.Show("Server run!!");
button1.Enabled = false;
}
和 IpClient 代碼：
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.IO;
namespace IpClient
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
TcpClient tcp;
NetworkStream ns;
StreamReader reader;
StreamWriter writer;
string str = "";
private void button1_Click(object sender, EventArgs e)
{
try
{
tcp = new TcpClient("127.0.0.1",5050);
tcp.ReceiveBufferSize = 25000;
tcp.NoDelay = true;
ns = tcp.GetStream();
reader = new StreamReader(ns);
writer = new StreamWriter(ns);
writer.WriteLine("register");
writer.Flush();
str = reader.ReadLine();
string[] strsplit = null;
strsplit = str.Split(',');
if (strsplit[0] != "registeredSucss")
{
MessageBox.Show("Not connected");
}
else
{
MessageBox.Show("Your connected");
}
}
catch
{
MessageBox.Show("error");
}
}
uj5u.com熱心網友回復：
我為你寫了一個完整的例子。
您可以根據需要對其進行修改。
簡單地將客戶端連接到服務器而不發送或接收訊息不會斷開連接。
在服務端和客戶端中，有一個執行緒不斷呼叫接收函式，并在連接斷開時發送訊息。
byte[] buffer = new byte[1024 * 1024 * 2];
int length = socket.Receive(buffer);
if (length == 0) {
///Write the desired operation
}
“關閉視窗時斷開連接”使用表單關閉事件：
private void Form1_FormClosing(object sender, FormClosingEventArgs e) {
}
這是兩個視窗使用的控制圖：
客戶端：
網路服務：
這是兩個視窗的代碼：
客戶端：
using System;
using System.Net;
using System.Net.Sockets;
using System.Text;
using System.Threading;
using System.Windows.Forms;
namespace IpClient {
public partial class Form1 : Form {
public Form1() {
InitializeComponent();
}
Socket socket;//The socket responsible for the connection
private void ConnectB_Click(object sender, EventArgs e) {
//Determine whether to request a connection repeatedly
try {
Log("Connected " socket.LocalEndPoint.ToString() "\nPlease do not request the connection repeatedly");
} catch {
//Determine whether the input is wrong
try {
socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
//Create IP address and port number;
IPAddress ip = IPAddress.Parse(Ipbox.Text);
int port = Convert.ToInt32(PortBox.Text);
IPEndPoint iPEndPoint = new IPEndPoint(ip, port);
//Determine whether you can connect to the server
try {
socket.Connect(iPEndPoint);
Log("Connected " socket.LocalEndPoint.ToString());
//Start receiving data thread
Thread th = new Thread(receive);
th.IsBackground = true;
th.Start();
} catch {
Log("Port is not open");
}
} catch {
socket = null;
Log("Input error");
}
}
}
private void Log(string str) {
ClientLog.AppendText(str "\r\n");
}
private void receive() {
while (true) {
//Determine whether the data can be received
try {
byte[] buffer = new byte[1024 * 1024 * 2];
int length = socket.Receive(buffer);
if (length == 0) {
Log("Port is not open");
CloseSocket(socket);
socket = null;
break;
}
string txt = Encoding.UTF8.GetString(buffer, 0, length);
Log(socket.RemoteEndPoint ":\r\t" txt);
} catch {
break;
}
}
}
private void Form1_Load(object sender, EventArgs e) {
Control.CheckForIllegalCrossThreadCalls = false;
}
private void CloseB_Click(object sender, EventArgs e) {
if (socket != null) {
CloseSocket(socket);
socket = null;
Log("Connection closed");
} else {
Log("Not connected");
}
}
private void SendB_Click(object sender, EventArgs e) {
try {
string txt = SendText.Text;
byte[] buffer = Encoding.ASCII.GetBytes(txt);//ascii encoding
socket.Send(buffer);
} catch {
Log("Not connected");
}
}
private void Form1_FormClosing(object sender, FormClosingEventArgs e) {
if (socket != null) {
CloseSocket(socket);
socket = null;
}
}
//Disconnect socket
private void CloseSocket(Socket o) {
try {
o.Shutdown(SocketShutdown.Both);
o.Disconnect(false);
o.Close();
} catch {
Log("error");
}
}
}
}
ip服務器：
using System;
using System.Collections.Generic;
using System.Net;
using System.Net.Sockets;
using System.Text;
using System.Threading;
using System.Windows.Forms;
namespace IpServer {
public partial class Form1 : Form {
public Form1() {
InitializeComponent();
}
Socket socketSend;//Socket responsible for communication
Socket socketListener;//Socket responsible for monitoring
Dictionary<string, Socket> dictionary = new Dictionary<string, Socket>();//Store the connected Socket
private void listnerB_Click(object sender, EventArgs e) {
//Create a listening socket
//SocketType.Stream streaming corresponds to the tcp protocol
//Dgram, datagram corresponds to UDP protocol
socketListener = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
try {
//Create IP address and port number;
IPAddress ip = IPAddress.Parse(Ipbox.Text);
int port = Convert.ToInt32(PortBox.Text);
IPEndPoint iPEndPoint = new IPEndPoint(ip, port);
//Let the listening socket bind the ip and port number
socketListener.Bind(iPEndPoint);
Log("Listen successfully" ip "\t" port);
//Set up the listening queue
socketListener.Listen(10);//Maximum number of connections at a time
Thread thread = new Thread(Listen);
thread.IsBackground = true;
thread.Start(socketListener);
} catch {
Log("Failed to listen");
}
}
//Use threads to receive data
private void Listen(object o) {
Socket socket = o as Socket;
while (true) {
//The socket responsible for monitoring is used to receive client connections
try {
//Create a socket responsible for communication
socketSend = socket.Accept();
dictionary.Add(socketSend.RemoteEndPoint.ToString(), socketSend);
clientCombo.Items.Add(socketSend.RemoteEndPoint.ToString());
clientCombo.SelectedIndex = clientCombo.Items.IndexOf(socketSend.RemoteEndPoint.ToString());
Log("Connected " socketSend.RemoteEndPoint.ToString());
//Start a new thread to receive information from the client
Thread th = new Thread(receive);
th.IsBackground = true;
th.Start(socketSend);
} catch {
continue;
}
}
}
//The server receives the message from the client
private void receive(object o) {
Socket socketSend = o as Socket;
while (true) {
//Try to connect to the client
try {
//After the client connects successfully, the server receives the message from the client
byte[] buffer = new byte[1024 * 1024 * 2];//2M大小
//Number of valid bytes received
int length = socketSend.Receive(buffer);
if (length == 0) {
string tmpIp = socketSend.RemoteEndPoint.ToString();
Log(tmpIp " Offline");
clientCombo.Items.Remove(tmpIp);
//Try to delete the connection information
try {
clientCombo.SelectedIndex = 0;
} catch {
clientCombo.Text = null;
}
CloseSocket(dictionary[tmpIp]);
dictionary.Remove(tmpIp);
break;
}
string str = Encoding.ASCII.GetString(buffer, 0, length);
Log(socketSend.RemoteEndPoint.ToString() "\n\t" str);
} catch {
break;
}
}
}
private void Log(string str) {
ServerLog.AppendText(str "\r\n");
}
private void Form1_Load(object sender, EventArgs e) {
//Cancel errors caused by cross-thread calls
Control.CheckForIllegalCrossThreadCalls = false;
}
//Send a message
private void SendB_Click(object sender, EventArgs e) {
string txt = SendText.Text;
byte[] buffer = Encoding.UTF8.GetBytes(txt);
try {
string ip = clientCombo.SelectedItem.ToString();//Get the selected ip address
Socket socketsend = dictionary[ip];
socketsend.Send(buffer);
} catch{
Log("Transmission failed");
}
}
private void Close_Click(object sender, EventArgs e) {
try {
try {
string tmpip = socketSend.RemoteEndPoint.ToString();
CloseSocket(dictionary[tmpip]);
dictionary.Remove(tmpip);
clientCombo.Items.Remove(tmpip);
try {
clientCombo.SelectedIndex = 0;
} catch {
clientCombo.Text = null;
}
socketSend.Close();
Log(socketSend.RemoteEndPoint.ToString() "Offline");
socketListener.Close();
Log("Listener is closed");
} catch{
socketListener.Close();
Log("Listener is closed");
}
} catch {
Log("close error");
}
}
private void Form1_FormClosing(object sender, FormClosingEventArgs e) {
try {
try {
string tmpip = socketSend.RemoteEndPoint.ToString();
CloseSocket(dictionary[tmpip]);
dictionary.Remove(tmpip);
clientCombo.Items.Remove(tmpip);
try {
clientCombo.SelectedIndex = 0;
} catch {
clientCombo.Text = null;
}
socketSend.Close();
socketListener.Close();
} catch {
socketListener.Close();
}
} catch {
}
}
private void CloseSocket(Socket o) {
try {
o.Shutdown(SocketShutdown.Both);
o.Disconnect(false);
o.Close();
} catch {
Log(o.ToString() "error");
}
}
}
}
輸出：
關閉視窗導致斷開連接：
手動斷開連接：
傳輸資料：
如果您對我的代碼有任何疑問，請在下面添加評論。
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