asp.net如何实现在线聊天

[水墨熊猫]

只要能够实现收发信息就可以，用stock的话怎么获得IP地址？或者是用其他的方法实现？最好是有例子小弟在此感谢！！！

[lishuai1030]

获得ip地址？
stock不懂 获得IP不用stock也可以啊

public IPAddress GetIP()
{
WebClient client = new WebClient();
byte[] bytRecv = client.DownloadData("http://www.123cha.com/"); //下载网页数据
string str = System.Text.Encoding.GetEncoding("gb2312").GetString(bytRecv);
string r = @"(((\d{1,3})|(1\d{2})|(2[0-4]\d)|(25[0-5]))\.){3}((\d{1,3})|(1\d{2})|(2[0-4]\d)|(25[0-5]))";
string ip = System.Text.RegularExpressions.Regex.Match(str, r).ToString(); //提取信息
return IPAddress.Parse(ip);
}这个方法就可以获得用户IP了啊
获得的是公网IP哦，类似的像局域网的内网IP啊什么的都能获取

[hyblusea]

参考:http://www.cnblogs.com/michaelxu/archive/2006/12/19/596872.html

[zenggezhuang]

有没有完整的代码呀？

[ycproc]

using System;
using System.Collections;
using System.Collections.Specialized;
using System.Text;
using System.Threading;
using System.Net.Sockets;
using System.Net;
using System.Runtime.Serialization;
using System.Runtime.Serialization.Formatters.Binary;
using System.IO;
using System.Windows.Forms;

namespace Chat
{
    public partial class ServerForm : Form
    {
        public ServerForm()
        {
            InitializeComponent();
        }

        #region 自定义字段

        /// <summary>
        /// 服务器端Ip，默认为8888
        /// </summary>
        private int _port = 8888;

        /// <summary>
        /// 保存客户端所有回话的哈希表
        /// </summary>
        private Hashtable _transmit_tb = new Hashtable();

        /// <summary>
        /// 用于接受消息的线程
        /// </summary>
        private Thread _receviccethread = null;

        /// <summary>
        /// 用于接受和发送消息的网络流
        /// </summary>
        private NetworkStream _nws = null;

        #endregion

        /// <summary>
        /// 初始化运行启动
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void ServerForm_Load(object sender, EventArgs e)
        {
            try
            {
                Form.CheckForIllegalCrossThreadCalls = false;
                for (int i = 0; i < 10; i++)
                { 
                
                }
                ThreadStart thsrt = new ThreadStart(Listen);
                Thread mythread = new Thread(thsrt);
                mythread.Start();
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.ToString(), " 提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
            }
        }

        /// <summary>
        /// 启动监听，轮询监听客户机请求并将客户端套接字存入转发表
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param> 
        private void Listen()
        {
            IPAddress _ip = IPAddress.Any;
            Socket newsoc = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
            newsoc.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReuseAddress, true);
            IPEndPoint locaEp = new IPEndPoint(IPAddress.Any, _port);
            this.messageAll.AppendText("服务器已启动，正在侦听...\t\n");
            try
            {
                newsoc.Bind(locaEp);
                newsoc.Listen(10);
                newsoc.BeginAccept(new AsyncCallback(onCall), newsoc);
            }
            catch(Exception ex)
            {
                MessageBox.Show(ex.ToString(), " 提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
            }
        }

        /// <summary>
        /// 监听回调
        /// </summary>
        /// <param name="ar"></param>
        private void onCall(IAsyncResult ar)
        {
            try
            {
                Socket serverSoc = (Socket)ar.AsyncState;
                Socket clent = serverSoc.EndAccept(ar);
                byte[] comes = System.Text.Encoding.UTF8.GetBytes("已链接");
                EndPoint enp = clent.RemoteEndPoint;
                clent.Send(comes, comes.Length, 0);
                _transmit_tb.Add(clent.RemoteEndPoint, null);
                serverSoc.BeginAccept(new AsyncCallback(onCall), serverSoc);
                while (true)
                {
                    byte[] buffer = new byte[1024];
                    int re = clent.Receive(comes);
                    string msg = Encoding.UTF8.GetString(comes, 0, re); 
                    string ip = clent.RemoteEndPoint.ToString();
                    if (msg.Length == 0)
                    {
                        _transmit_tb.Remove(clent.RemoteEndPoint);
                        _receviccethread.Interrupt();
                        _receviccethread.Abort();
                        break;
                    }
                    this.messageAll.AppendText(ip + "在" + DateTime.Now + "说" + msg + "\t\n");
                }
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.ToString(), " 提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
            }
        }

        /// <summary>
        /// 关闭进程
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void ServerForm_FormClosing1(object sender, FormClosingEventArgs e)
        {
            if (_receviccethread != null)
            {
                _receviccethread.Interrupt();
                _receviccethread.Abort();
                _nws.Close();
                this.Close();
            }
        }
    }
}

[ycproc]

上面是服务器端
下面是客户端

仅仅只是DEMO

using System;
using System.Collections;
using System.Collections.Specialized;
using System.Text;
using System.Threading;
using System.Net.Sockets;
using System.Net;
using System.Runtime.Serialization;
using System.Runtime.Serialization.Formatters.Binary;
using System.IO;
using System.Drawing;
using System.Windows.Forms;

namespace Clent
{
    public partial class login : Form
    {
        public login()
        {
            InitializeComponent();
        }

        /// <summary>
        /// IP地址
        /// </summary>
        private IPAddress _Ipaddress;

        /// <summary>
        /// 用于接受和发送消息的网络流
        /// </summary>
        private NetworkStream _nws = null;

        /// <summary>
        /// 链接服务器
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void BtnOk_Click(object sender, EventArgs e)
        {
            if (!ValidateInfo())
            {
                return;
            }
            int port = int.Parse(duankou.Text);
            //向服务器发送链接请求
            TCPConnection conn = new TCPConnection(_Ipaddress, port);
            TcpClient _tcpc = conn.Connect();
            if (_tcpc == null)
            {
                MessageBox.Show("无法链接到服务器，请重试！", "错误", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
            }
            else
            {
                NetworkStream netstream = _tcpc.GetStream();//提供用于访问网络的基本数据流 
                //向服务器发送用户名以确认身份
                netstream.Write(Encoding.Unicode.GetBytes(this.username.Text), 0, Encoding.Unicode.GetBytes(this.username.Text).Length);
                //得到登录结果
                byte[] buffer = new byte[1024];
            }
            string localtext = null;
            string sendtext = null;
            string msg = username.Text.Trim();
            if (msg == string.Empty)
            {
                MessageBox.Show("不能发送空消息", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
                return;
            }
            sendtext = string.Format("[广播]" + this.iptext.Text + "在" + DateTime.Now + "对所有人说：" + msg + "\t\n");
            _nws.Write(Encoding.Unicode.GetBytes(sendtext), 0, Encoding.Unicode.GetBytes(sendtext).Length);
            
            richTextBox1.AppendText(localtext);
            this.username.Clear();
        }

        /// <summary>
        /// 清空文本框
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void button1_Click(object sender, EventArgs e)
        {
            this.duankou.Text = "";
            this.iptext.Text = "";
            this.username.Text = "";
        }

        /// <summary>
        /// 验证登录信息
        /// </summary>
        /// <returns>验证结果</returns>
        private bool ValidateInfo()
        {
            if (username.Text.Trim() == string.Empty)
            {
                MessageBox.Show("请填写用户名！", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
                return false;
            }

            if (!IPAddress.TryParse(iptext.Text, out _Ipaddress))
            {
                MessageBox.Show("IP地址不合法!", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
                return false;
            }
            int _port;
            if (!int.TryParse(duankou.Text, out _port))
            {
                MessageBox.Show("端口号不合法!", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
                return false;
            }
            else
            {
                if (_port < 1024 || _port > 65535)
                {
                    MessageBox.Show("端口号不合法!", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
                    return false;
                }
            }
            return true;
        }
    }
}