怎么用C#做一个C⼀S模式的聊天工具

2024-11-15 07:03:11
推荐回答(3个)
回答1:

实际是用socket方法即可实现这个功能,具体代码看如下

服务端:

#include  
#include  
#include  
#include  
#include  
#include  
#include  
#include  
#include  
#include  
  
#define BUFLEN 1024 
#define PORT 6666
#define LISTNUM 20
  
int main() 

    int sockfd, newfd; 
    struct sockaddr_in s_addr, c_addr; 
    char buf[BUFLEN]; 
    socklen_t len; 
    unsigned int port, listnum; 
    fd_set rfds; 
    struct timeval tv; 
    int retval,maxfd; 
      
    /*建立socket*/ 
    if((sockfd = socket(PF_INET, SOCK_STREAM, 0)) == -1){ 
        perror("socket"); 
        exit(errno); 
    }else 
        printf("socket create success!\n"); 
    memset(&s_addr,0,sizeof(s_addr)); 
    s_addr.sin_family = AF_INET; 
    s_addr.sin_port = htons(PORT); 
    s_addr.sin_addr.s_addr = htons(INADDR_ANY); 
    
    /*把地址和端口帮定到套接字上*/ 
    if((bind(sockfd, (struct sockaddr*) &s_addr,sizeof(struct sockaddr))) == -1){ 
        perror("bind"); 
        exit(errno); 
    }else 
        printf("bind success!\n"); 
    /*侦听本地端口*/ 
    if(listen(sockfd,listnum) == -1){ 
        perror("listen"); 
        exit(errno); 
    }else 
        printf("the server is listening!\n"); 
    while(1){ 
        printf("*****************聊天开始***************\n"); 
        len = sizeof(struct sockaddr); 
        if((newfd = accept(sockfd,(struct sockaddr*) &c_addr, &len)) == -1){ 
            perror("accept"); 
            exit(errno); 
        }else 
            printf("正在与您聊天的客户端是:%s: %d\n",inet_ntoa(c_addr.sin_addr),ntohs(c_addr.sin_port)); 
        while(1){ 
            FD_ZERO(&rfds); 
            FD_SET(0, &rfds); 
            maxfd = 0; 
            FD_SET(newfd, &rfds); 
            /*找出文件描述符集合中最大的文件描述符*/ 
            if(maxfd < newfd) 
                maxfd = newfd; 
            /*设置超时时间*/ 
            tv.tv_sec = 6; 
            tv.tv_usec = 0; 
            /*等待聊天*/ 
            retval = select(maxfd+1, &rfds, NULL, NULL, &tv); 
            if(retval == -1){ 
                printf("select出错,与该客户端连接的程序将退出\n"); 
                break; 
            }else if(retval == 0){ 
                printf("waiting...\n"); 
                continue; 
            }else{ 
                /*用户输入信息了*/ 
                if(FD_ISSET(0, &rfds)){ 
            
                    /******发送消息*******/ 
                    memset(buf,0,sizeof(buf)); 
                    /*fgets函数:从流中读取BUFLEN-1个字符*/ 
                    fgets(buf,BUFLEN,stdin); 
                    /*打印发送的消息*/ 
                    //fputs(buf,stdout); 
                    if(!strncasecmp(buf,"quit",4)){ 
                        printf("server 请求终止聊天!\n"); 
                        break; 
                    } 
                        len = send(newfd,buf,strlen(buf),0); 
                    if(len > 0) 
                        printf("\t消息发送成功:%s\n",buf); 
                    else{ 
                        printf("消息发送失败!\n"); 
                        break; 
                    } 
                } 
                /*客户端发来了消息*/ 
                if(FD_ISSET(newfd, &rfds)){ 
                    /******接收消息*******/ 
                    memset(buf,0,sizeof(buf)); 
                    /*fgets函数:从流中读取BUFLEN-1个字符*/ 
                    len = recv(newfd,buf,BUFLEN,0); 
                    if(len > 0) 
                        printf("客户端发来的信息是:%s\n",buf); 
                    else{ 
                        if(len < 0 ) 
                            printf("接受消息失败!\n"); 
                        else 
                            printf("客户端退出了,聊天终止!\n"); 
                        break; 
                    } 
                } 
            } 
        } 
        /*关闭聊天的套接字*/ 
        close(newfd); 
        /*是否退出服务器*/ 
        printf("服务器是否退出程序:y->是;n->否? "); 
        bzero(buf, BUFLEN); 
        fgets(buf,BUFLEN, stdin); 
        if(!strncasecmp(buf,"y",1)){ 
            printf("server 退出!\n"); 
            break; 
        } 
    } 
    /*关闭服务器的套接字*/ 
    close(sockfd); 
    return 0; 
}

客户端

#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#define BUFLEN 1024
#define PORT 6666
int main(int argc, char **argv)
{
    int sockfd;
    struct sockaddr_in s_addr;
    socklen_t len;
    unsigned int port;
    char buf[BUFLEN];
    fd_set rfds;
    struct timeval tv;
    int retval, maxfd; 
    
    /*建立socket*/
    if((sockfd = socket(AF_INET, SOCK_STREAM, 0)) == -1){
        perror("socket");
        exit(errno);
    }else
        printf("socket create success!\n");
    
    /*设置服务器ip*/
    memset(&s_addr,0,sizeof(s_addr));
    s_addr.sin_family = AF_INET;
     s_addr.sin_port = htons(PORT);
    if (inet_aton(argv[1], (struct in_addr *)&s_addr.sin_addr.s_addr) == 0) {
        perror(argv[1]);
        exit(errno);
    }
    /*开始连接服务器*/ 
    if(connect(sockfd,(struct sockaddr*)&s_addr,sizeof(struct sockaddr)) == -1){
        perror("connect");
        exit(errno);
    }else
        printf("conncet success!\n");
    
    while(1){
        FD_ZERO(&rfds);
        FD_SET(0, &rfds);
        maxfd = 0;
        FD_SET(sockfd, &rfds);
        if(maxfd < sockfd)
            maxfd = sockfd;
        tv.tv_sec = 6;
        tv.tv_usec = 0;
        retval = select(maxfd+1, &rfds, NULL, NULL, &tv);
        if(retval == -1){
            printf("select出错,客户端程序退出\n");
            break;
        }else if(retval == 0){
            printf("waiting...\n");
            continue;
        }else{
            /*服务器发来了消息*/
            if(FD_ISSET(sockfd,&rfds)){
                /******接收消息*******/
                bzero(buf,BUFLEN);
                len = recv(sockfd,buf,BUFLEN,0);
                if(len > 0)
                    printf("服务器发来的消息是:%s\n",buf);
                else{
                    if(len < 0 )
                        printf("接受消息失败!\n");
                    else
                        printf("服务器退出了,聊天终止!\n");
                break; 
                }
            }
            /*用户输入信息了,开始处理信息并发送*/
            if(FD_ISSET(0, &rfds)){ 
                /******发送消息*******/ 
                bzero(buf,BUFLEN);
                fgets(buf,BUFLEN,stdin);
               
                if(!strncasecmp(buf,"quit",4)){
                    printf("client 请求终止聊天!\n");
                    break;
                }
                    len = send(sockfd,buf,strlen(buf),0);
                if(len > 0)
                    printf("\t消息发送成功:%s\n",buf); 
                else{
                    printf("消息发送失败!\n");
                    break; 
                } 
            }
        }
    
    }
    /*关闭连接*/
    close(sockfd);
    return 0;
}

客户端我们可以放到任何一台机子上,只要保证都能在同一个局域网下,连到自己的IP地址就行。开启服务端后,在开启客户端,就可以聊天了:

服务端:

waiting...
waiting...
waiting...
nihal
    消息发送成功:nihal
客户端发来的信息是:zhuzhu
hehe
    消息发送成功:hehe
客户端发来的信息是:haha 
客户端退出了,聊天终止!
服务器是否退出程序:y->是;n->否? y
server端退出。

客户端

waiting...
waiting...
waiting...
服务器发来的消息是:nihal
zhuzhu
消息发送成功:zhuzhu
服务器发来的消息是:hehe
haha
消息发送成功:haha

回答2:

TCP UDP 都可以。如果多人的话 必须有个服务器 点对点的话 客户端即服务器。
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.Sockets;
using System.Net;
using System.Threading;
namespace CHEAT
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
EndPoint ep;
string receiveData;
bool _star = false;
private void AcceptMessage()
{
//d定义socket对象
Socket socket = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
IPEndPoint iep = new IPEndPoint(IPAddress.Any, 8899);
socket.Bind(iep);
ep = (EndPoint)iep;
try
{
while (!_star)
{
byte[] bytes = new byte[1024];
socket.ReceiveFrom(bytes, ref ep);
receiveData = System.Text.Encoding.Unicode.GetString(bytes);
receiveData = receiveData.TrimEnd('\u0000');
Thread th = new Thread(new ThreadStart(Acc));
th.Start();
}
}
catch (Exception)
{
socket.Close();
}
}

private delegate void SetTextCallbakc();
private void Acc() //多线程
{
SetTextCallbakc stcb = new SetTextCallbakc(callbakc);
Invoke(stcb); //代理
}
private void callbakc() //弹窗参数
{
string time = DateTime.Now.ToString();
string message = "来自" + ep.ToString() + "的消息 "+time + "\r\n";
textBox1.Text +=message+ receiveData +"\r\n";
}
private void button1_Click(object sender, EventArgs e)
{
//只能用UDP协议发送广播,所以ProtocolType设置为UDP
Socket socket = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
//让其自动提供子网中的IP地址
IPEndPoint iep = new IPEndPoint(IPAddress.Broadcast, 8899);
//设置broadcast值为1,允许套接字发送广播信息
socket.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.Broadcast, 1);
//将发送内容转换为字节数组
byte[] bytes = System.Text.Encoding.Unicode.GetBytes(this.textBox2.Text);
//向子网发送信息
socket.SendTo(bytes, iep);
socket.Close();
}
private void Form1_Load(object sender, EventArgs e)
{
textBox2.Focus();
Thread th = new Thread(new ThreadStart(AcceptMessage));
th.Start();
}
private void Form1_FormClosed(object sender, FormClosedEventArgs e)
{
Application.Exit();
}
}
}

这是一个基于udp的 纯手敲 望采纳

回答3:

核心技术主要有两个: 客户端、服务器端通信;显示输出。 如果你写过局域网的聊天工具,我想它本来就是C/S模式的。

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