C#网络编程之Socket编程
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Net;
using System.Net.Sockets;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Threading;
using System.IO;
namespace SocketServer
{
public partial class FrmServer : Form
{
public FrmServer()
{
InitializeComponent();
}
//定义回调:解决跨线程访问问题
private delegate void SetTextValueCallBack(string strValue);
//定义接收客户端发送消息的回调
private delegate void ReceiveMsgCallBack(string strReceive);
//声明回调
private SetTextValueCallBack setCallBack;
//声明
private ReceiveMsgCallBack receiveCallBack;
//定义回调:给ComboBox控件添加元素
private delegate void SetCmbCallBack(string strItem);
//声明
private SetCmbCallBack setCmbCallBack;
//定义发送文件的回调
private delegate void SendFileCallBack(byte[] bf);
//声明
private SendFileCallBack sendCallBack;
//用于通信的Socket
Socket socketSend;
//用于监听的SOCKET
Socket socketWatch;
//将远程连接的客户端的IP地址和Socket存入集合中
Dictionary
//创建监听连接的线程
Thread AcceptSocketThread;
//接收客户端发送消息的线程
Thread threadReceive;
///
/// 开始监听
///
///
///
private void btn_Start_Click(object sender, EventArgs e)
{
//当点击开始监听的时候 在服务器端创建一个负责监听IP地址和端口号的Socket
socketWatch = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
//获取ip地址
IPAddress ip=IPAddress.Parse(this.txt_IP.Text.Trim());
//创建端口号
IPEndPoint point=new IPEndPoint(ip,Convert.ToInt32(this.txt_Port.Text.Trim()));
//绑定IP地址和端口号
socketWatch.Bind(point);
this.txt_Log.AppendText("监听成功"+"
");
//开始监听:设置最大可以同时连接多少个请求
socketWatch.Listen(10);
//实例化回调
setCallBack = new SetTextValueCallBack(SetTextValue);
receiveCallBack = new ReceiveMsgCallBack(ReceiveMsg);
setCmbCallBack = new SetCmbCallBack(AddCmbItem);
sendCallBack = new SendFileCallBack(SendFile);
//创建线程
AcceptSocketThread = new Thread(new ParameterizedThreadStart(StartListen));
AcceptSocketThread.IsBackground = true;
AcceptSocketThread.Start(socketWatch);
}
///
/// 等待客户端的连接,并且创建与之通信用的Socket
///
///
private void StartListen(object obj)
{
Socket socketWatch = obj as Socket;
while (true)
{
//等待客户端的连接,并且创建一个用于通信的Socket
socketSend = socketWatch.Accept();
//获取远程主机的ip地址和端口号
string strIp=socketSend.RemoteEndPoint.ToString();
dicSocket.Add(strIp, socketSend);
this.cmb_Socket.Invoke(setCmbCallBack, strIp);
string strMsg = "远程主机:" + socketSend.RemoteEndPoint + "连接成功";
//使用回调
txt_Log.Invoke(setCallBack, strMsg);
//定义接收客户端消息的线程
Thread threadReceive = new Thread(new ParameterizedThreadStart(Receive));
threadReceive.IsBackground = true;
threadReceive.Start(socketSend);
}
}
///
/// 服务器端不停的接收客户端发送的消息
///
///
private void Receive(object obj)
{
Socket socketSend = obj as Socket;
while (true)
{
//客户端连接成功后,服务器接收客户端发送的消息
byte[] buffer = new byte[2048];
//实际接收到的有效字节数
int count = socketSend.Receive(buffer);
if (count == 0)//count 表示客户端关闭,要退出循环
{
break;
}
else
{
string str = Encoding.Default.GetString(buffer, 0, count);
string strReceiveMsg = "接收:" + socketSend.RemoteEndPoint + "发送的消息:" + str;
txt_Log.Invoke(receiveCallBack, strReceiveMsg);
}
}
}
///
/// 回调委托需要执行的方法
///
///
private void SetTextValue(string strValue)
{
this.txt_Log.AppendText(strValue + "
");
}
private void ReceiveMsg(string strMsg)
{
this.txt_Log.AppendText(strMsg + "
");
}
private void AddCmbItem(string strItem)
{
this.cmb_Socket.Items.Add(strItem);
}
///
/// 服务器给客户端发送消息
///
///
///
private void btn_Send_Click(object sender, EventArgs e)
{
try
{
string strMsg = this.txt_Msg.Text.Trim();
byte[] buffer = Encoding.Default.GetBytes(strMsg);
List
list.Add(0);
list.AddRange(buffer);
//将泛型集合转换为数组
byte[] newBuffer = list.ToArray();
//获得用户选择的IP地址
string ip = this.cmb_Socket.SelectedItem.ToString();
dicSocket[ip].Send(newBuffer);
}
catch (Exception ex)
{
MessageBox.Show("给客户端发送消息出错:"+ex.Message);
}
//socketSend.Send(buffer);
}
///
/// 选择要发送的文件
///
///
///
private void btn_Select_Click(object sender, EventArgs e)
{
OpenFileDialog dia = new OpenFileDialog();
//设置初始目录
dia.InitialDirectory = @"";
dia.Title = "请选择要发送的文件";
//过滤文件类型
dia.Filter = "所有文件|*.*";
dia.ShowDialog();
//将选择的文件的全路径赋值给文本框
this.txt_FilePath.Text = dia.FileName;
}
///
/// 发送文件
///
///
///
private void btn_SendFile_Click(object sender, EventArgs e)
{
List
//获取要发送的文件的路径
string strPath = this.txt_FilePath.Text.Trim();
using (FileStream sw = new FileStream(strPath,FileMode.Open,FileAccess.Read))
{
byte[] buffer = new byte[2048];
int r = sw.Read(buffer, 0, buffer.Length);
list.Add(1);
list.AddRange(buffer);
byte[] newBuffer = list.ToArray();
//发送
//dicSocket[cmb_Socket.SelectedItem.ToString()].Send(newBuffer, 0, r+1, SocketFlags.None);
btn_SendFile.Invoke(sendCallBack, newBuffer);
}
}
private void SendFile(byte[] sendBuffer)
{
try
{
dicSocket[cmb_Socket.SelectedItem.ToString()].Send(sendBuffer, SocketFlags.None);
}
catch (Exception ex)
{
MessageBox.Show("发送文件出错:"+ex.Message);
}
}
private void btn_Shock_Click(object sender, EventArgs e)
{
byte[] buffer = new byte[1] { 2};
dicSocket[cmb_Socket.SelectedItem.ToString()].Send(buffer);
}
///
/// 停止监听
///
///
///
private void btn_StopListen_Click(object sender, EventArgs e)
{
socketWatch.Close();
socketSend.Close();
//终止线程
AcceptSocketThread.Abort();
threadReceive.Abort();
}
}
}
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