分享一个C#编写简单的聊天程序(详细介绍)

这里需要注意的就是上面的侦听端口，是程序接收消息时的侦听端口，也就是IMessageReceiver所使用的。其他的没有什么好说的，下来我们直接看一下代码，控件的命名是自解释的，我就不多说什么了。唯一要稍微说明下的是txtMessage指的是下面发送消息的文本框，txtContent指上面的消息记录文本框：

public partial class PrimaryForm : Form {

 private Talker talker;
 private string userName;

 public PrimaryForm(string name) {
  InitializeComponent();
  userName = lbName.Text = name;
  this.talker = new Talker();
  this.Text = userName + " Talking ...";
  talker.ClientLost +=
  new ConnectionLostEventHandler(talker_ClientLost);
  talker.ClientConnected +=
  new ClientConnectedEventHandler(talker_ClientConnected);
  talker.MessageReceived += 
  new MessageReceivedEventHandler(talker_MessageReceived);
  talker.PortNumberReady +=
  new PortNumberReadyEventHandler(PrimaryForm_PortNumberReady);
 }

 void ConnectStatus() { }
 void DisconnectStatus() { }

 // 端口号OK
 void PrimaryForm_PortNumberReady(int portNumber) {  
  PortNumberReadyEventHandler del = delegate(int port) {
  lbPort.Text = port.ToString();
  };
  lbPort.Invoke(del, portNumber);
 }

 // 接收到消息
 void talker_MessageReceived(string msg) {
  MessageReceivedEventHandler del = delegate(string m) {
  txtContent.Text += m;
  };
  txtContent.Invoke(del, msg);
 }

 // 有客户端连接到本机
 void talker_ClientConnected(IPEndPoint endPoint) {
  ClientConnectedEventHandler del = delegate(IPEndPoint end) {
  IPHostEntry host = Dns.GetHostEntry(end.Address);
  txtContent.Text += 
   String.Format("System[{0}]：rn远程主机{1}连接至本地。rn", DateTime.Now, end);
  };
  txtContent.Invoke(del, endPoint);
 }

 // 客户端连接断开
 void talker_ClientLost(string info) {
  ConnectionLostEventHandler del = delegate(string information) {
  txtContent.Text +=
   String.Format("System[{0}]：rn{1}rn", DateTime.Now, information);
  };
  txtContent.Invoke(del, info);
 }

 // 发送消息
 private void btnSend_Click(object sender, EventArgs e) {
  if (String.IsNullOrEmpty(txtMessage.Text)) {
  MessageBox.Show("请输入内容！");
  txtMessage.Clear();
  txtMessage.Focus();
  return;
  }

  Message msg = new Message(userName, txtMessage.Text);
  if (talker.SendMessage(msg)) {
  txtContent.Text += msg.ToString();
  txtMessage.Clear();
  } else {
  txtContent.Text +=
   String.Format("System[{0}]：rn远程主机已断开连接rn", DateTime.Now);
  DisconnectStatus();
  }
 }


 // 点击连接
 private void btnConnect_Click(object sender, EventArgs e) {

  string host = txtHost.Text;
  string ip = txtHost.Text;
  int port;

  if (String.IsNullOrEmpty(txtHost.Text)) {
  MessageBox.Show("主机名称或地址不能为空");
  }  

  try{
  port = Convert.ToInt32(txtPort.Text);
  }catch{
  MessageBox.Show("端口号不能为空，且必须为数字");
  return;
  }
  
  if (talker.ConnectByHost(host, port)) {
  ConnectStatus();
  txtContent.Text +=
   String.Format("System[{0}]：rn已成功连接至远程rn", DateTime.Now);
  return;
  }
  
  if(talker.ConnectByIp(ip, port)){
  ConnectStatus();
  txtContent.Text +=
   String.Format("System[{0}]：rn已成功连接至远程rn", DateTime.Now);
  }else{
  MessageBox.Show("远程主机不存在，或者拒绝连接！");
  }  

  txtMessage.Focus();
 }

 // 关闭按钮点按
 private void btnClose_Click(object sender, EventArgs e) {
  try {
  talker.Dispose();
  Application.Exit();
  } catch {
  }
 }

 // 直接点击右上角的叉
 private void PrimaryForm_FormClosing(object sender, FormClosingEventArgs e) {
  try {
  talker.Dispose();
  Application.Exit();
  } catch {
  }
 }

 // 点击注销
 private void btnSignout_Click(object sender, EventArgs e) {
  talker.SignOut();
  DisconnectStatus();
  txtContent.Text += 
  String.Format("System[{0}]：rn已经注销rn",DateTime.Now);
 }

 private void btnClear_Click(object sender, EventArgs e) {
  txtContent.Clear();
 }
 }								 
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