C# Socket通信简单实例
标签:height dict watch open wrap ora 抽象 arc hive
一、套接字(socket)概念
套接字(socket)是通信的基石,是支持TCP/IP协议的网络通信的基本操作单元。它是网络通信过程中端点的抽象表示,包含进行网络通信必须的五种信息:连接使用的协议,本地主机的IP地址,本地进程的协议端口,远地主机的IP地址,远地进程的协议端口。
应用层通过传输层进行数据通信时,TCP会遇到同时为多个应用程序进程提供并发服务的问题。多个TCP连接或多个应用程序进程可能需要通过同一个 TCP协议端口传输数据。为了区别不同的应用程序进程和连接,许多计算机操作系统为应用程序与TCP/IP协议交互提供了套接字(Socket)接口。应 用层可以和传输层通过Socket接口,区分来自不同应用程序进程或网络连接的通信,实现数据传输的并发服务。
二、建立socket连接
建立Socket连接至少需要一对套接字,其中一个运行于客户端,称为ClientSocket ,另一个运行于服务器端,称为ServerSocket 。
套接字之间的连接过程分为三个步骤:服务器监听,客户端请求,连接确认。
- 服务器监听:服务器端套接字并不定位具体的客户端套接字,而是处于等待连接的状态,实时监控网络状态,等待客户端的连接请求
- 客户端请求:指客户端的套接字提出连接请求,要连接的目标是服务器端的套接字。为此,客户端的套接字必须首先描述它要连接的服务器的套接字,指出服务器端套接字的地址和端口号,然后就向服务器端套接字提出连接请求。
- 连接确认:当服务器端套接字监听到或者说接收到客户端套接字的连接请求时,就响应客户端套接字的请求,建立一个新的线程,把服务器端套接字的描述发给客户 端,一旦客户端确认了此描述,双方就正式建立连接。而服务器端套接字继续处于监听状态,继续接收其他客户端套接字的连接请求。
服务端前台XMAL
"Socket通信.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:local="clr-namespace:Socket通信"
mc:Ignorable="d"
Title="服务端" Height="350" Width="525" Loaded="Window_Loaded" >
"50*"/>
"190*"/>
"81*"/>
"0">
"Center">
"3" Width="150" Name="IP">
"3" Width="100" Name="Port">
"1">
"ListConnet">"2">
"405*"/>
"113*"/>
"SentConnet">
服务端后台代码
using System;
using System.Net;
using System.Net.Sockets;
using System.Text;
using System.Threading;
using System.Windows;
namespace Socket通信
{
///
/// MainWindow.xaml 的交互逻辑
///
public partial class MainWindow : Window
{
public MainWindow()
{
InitializeComponent();
}
Socket socketSend;
private void Start_View_Click(object sender, RoutedEventArgs e)
{
try
{
//点击开始监听时 在服务端创建一个负责监听IP和端口号的Socket
Socket socketWatch = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
IPAddress ip = IPAddress.Any; //创建对象端口
IPEndPoint point = new IPEndPoint(ip, Convert.ToInt32(Port.Text));
socketWatch.Bind(point);//绑定端口号
ShowMsg("监听成功!");
socketWatch.Listen(10);//设置监听
//创建监听线程
Thread thread = new Thread(Listen);
thread.IsBackground = true;
thread.Start(socketWatch);
}
catch { }
}
void Listen(object o)
{
try
{
Socket socketWatch = o as Socket;
while (true)
{
socketSend = socketWatch.Accept();//等待接收客户端连接
ShowMsg(socketSend.RemoteEndPoint.ToString() + ":" + "连接成功!");
//开启一个新线程,执行接收消息方法
Thread r_thread = new Thread(Received);
r_thread.IsBackground = true;
r_thread.Start(socketSend);
}
}
catch { }
}
///
/// 服务器端不停的接收客户端发来的消息
///
///
void Received(object o)
{
try
{
Socket socketSend = o as Socket;
while (true)
{
//客户端连接服务器成功后,服务器接收客户端发送的消息
byte[] buffer = new byte[1024 * 1024 * 3];
//实际接收到的有效字节数
int len = socketSend.Receive(buffer);
if (len == 0)
{
break;
}
string str = Encoding.UTF8.GetString(buffer, 0, len);
ShowMsg("接收到的客户端数据:" + socketSend.RemoteEndPoint + ":" + str);
}
}
catch { }
}
///
/// 服务器向客户端发送消息
///
///
void Send(string str)
{
byte[] buffer = Encoding.UTF8.GetBytes(str);
socketSend.Send(buffer);
}
void ShowMsg(string msg)
{
Dispatcher.Invoke(() => { ListConnet.Items.Add(msg + "\r\n"); });
}
private void Send_Click(object sender, RoutedEventArgs e)
{
Send(SentConnet.Text.Trim());
}
private void Window_Loaded(object sender, RoutedEventArgs e)
{
}
private void Stop_Click(object sender, RoutedEventArgs e)
{
socketSend.Close();
ShowMsg("已经停止监听!");
}
}
}
客户端前台XMAL
"Socket_Client.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:local="clr-namespace:Socket_Client"
mc:Ignorable="d"
Title="客户端" Height="350" Width="525">
"50*"/>
"190*"/>
"81*"/>
"0">
"Center">
"3" Width="150" Name="IP">
"3" Width="100" Name="Port">
"1">
"ListConnet">"2">
"405*"/>
"113*"/>
"SentConnet">
客户端后台代码
using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Net.Sockets;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
namespace Socket_Client
{
///
/// MainWindow.xaml 的交互逻辑
///
public partial class MainWindow : Window
{
public MainWindow()
{
InitializeComponent();
}
Socket socketSend;
private void Start_View_Click(object sender, RoutedEventArgs e)
{
try
{
//创建客户端Socket,获得远程ip和端口号
socketSend = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
IPAddress ip = IPAddress.Parse(IP.Text);
IPEndPoint point = new IPEndPoint(ip, Convert.ToInt32(Port.Text));
socketSend.Connect(point);
ShowMsg("连接成功!");
//开启新的线程,不停的接收服务器发来的消息
Thread c_thread = new Thread(Received);
c_thread.IsBackground = true;
c_thread.Start();
}
catch (Exception)
{
ShowMsg("IP或者端口号错误...");
}
}
void ShowMsg(string str)
{
Dispatcher.Invoke(() => { ListConnet.AppendText(str + "\r\n"); });
}
///
/// 接收服务端返回的消息
///
void Received()
{
while (true)
{
try
{
byte[] buffer = new byte[1024 * 1024 * 3];
//实际接收到的有效字节数
int len = socketSend.Receive(buffer);
if (len == 0)
{
continue;
}
string str = Encoding.UTF8.GetString(buffer, 0, len);
ShowMsg("接收到的服务端数据:" + socketSend.RemoteEndPoint + ":" + str);
}
catch
{
}
}
}
private void Send_Click(object sender, RoutedEventArgs e)
{
try
{
string msg = SentConnet.Text.Trim();
byte[] buffer = new byte[1024 * 1024 * 3];
buffer = Encoding.UTF8.GetBytes(msg);
socketSend.Send(buffer);
}
catch { }
}
private void Stop_Click(object sender, RoutedEventArgs e)
{
socketSend.Close();
ShowMsg("连接已经断开!");
}
}
}
转:https://www.cnblogs.com/TechnologyDictionary/archive/2019/02/22/10423068.html
C# Socket通信简单实例
标签:height dict watch open wrap ora 抽象 arc hive
原文地址:https://www.cnblogs.com/ashbur/p/12054110.html
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