局域网聊天发送信息代码,CSharp代码库,德仔网

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【CSharp】局域网聊天发送信息
作者:Dezai.CN / 发布于2013/5/12/ 457

	//发送大量文本消息
	 private void sendMessage()
	 {
	 if (richTextBox_send.Text.Trim().Length==0 && richTextBox_send.Rtf.IndexOf("pict")<0)
	 {
	 MessageBox.Show("发送的消息不能为空");
	 return;
	 }
	
	 if (Encoding.Default.GetByteCount(richTextBox_send.Text) > 1024*3)
	 {
	 MessageBox.Show("发送的内容过长");
	 return;
	 }
	 try
	 {
	 //初始化接受套接字：寻址方案，以字符流方式和Tcp通信
	 socketSent = new Socket(AddressFamily.InterNetwork,
	 SocketType.Stream,
	 ProtocolType.Tcp);

	 //设置目标服务器IP地址和端口
	 ipSent = new IPEndPoint(IPAddress.Parse(ip), 8001);

	 //与目标服务器进行连接
	 socketSent.Connect(ipSent);
	
	 //将要发送的消息转化为字节流，然后发送
	

	 socketSent.Send(Encoding.Default.GetBytes("MSG"));
	 Thread.Sleep(100);
	 //循环发送
	 //设置缓冲区为1024byte
	 byte[] buff = new byte[1024];
	 int len = 0;
	 MemoryStream data = new MemoryStream();
	 richTextBox_accept.Rtf = richTextBox_accept.Rtf.Replace(@"\f1\par", "");
	 richTextBox_send.SaveFile(data, RichTextBoxStreamType.RichText);
	 data.Position = 0;
	 while ((len = data.Read(buff, 0, 1024)) != 0)
	 {
	 //按实际的字节总量发送信息
	 socketSent.Send(buff, 0, len, SocketFlags.None);
	 //richTextBox_accept.AppendText(Encoding.Default.GetString(buff));
	 }
	 data.Close();
	 data.Dispose();
	 socketSent.Send(Encoding.Default.GetBytes("END"));
	 socketSent.Close();
	 }
	 catch
	 {
	 MessageBox.Show(user + "已经下线！");
	 return;
	 }
	 if (richTextBox_accept.Text != "")
	 {
	 richTextBox_accept.SelectionColor = Color.Green;
	 richTextBox_accept.AppendText("\n" + currentUser + " " + DateTime.Now.ToString("yyyy-mm-dd hh:mm:ss") + "\n");
	 richTextBox_accept.SelectionColor = Color.Black;

	 richTextBox_accept.Select(richTextBox_accept.Text.Length, 0);
	 richTextBox_accept.SelectedRtf = richTextBox_send.Rtf;
	 richTextBox_accept.Update();
	 richTextBox_accept.Select(richTextBox_accept.Rtf.Length, 0);
	 }
	 else
	 {
	 richTextBox_accept.SelectionColor = Color.Green;
	 richTextBox_accept.AppendText(currentUser + " " + DateTime.Now.ToString("yyyy-mm-dd hh:mm:ss") + "\n");
	 richTextBox_accept.SelectionColor = Color.Black;

	 richTextBox_accept.Select(richTextBox_accept.Text.Length, 0);
	 richTextBox_accept.SelectedRtf = richTextBox_send.Rtf;
	 richTextBox_accept.Update();
	 richTextBox_accept.Select(richTextBox_accept.Rtf.Length, 0);

	 }
	 this.richTextBox_send.Clear();
	 richTextBox_accept.ScrollToCaret();
	 }

	 private void btn_close_Click(object sender, EventArgs e)
	 {
	 this.Close();
	 }

	 //组合键发送消息
	 private void richTextBox_send_KeyUp(object sender, KeyEventArgs e)
	 {
	 if ((Control.ModifierKeys & Keys.Control) != 0 && e.KeyCode == Keys.Enter)
	 {
	 if (radioBtn_sendStyle2.Checked)//发送模式选择为Enter+Ctrl
	 { sendMessage(); }
	 }
	 else if (e.KeyCode == Keys.Enter)
	 {
	 if (radioBtn_sendStyle1.Checked)//发送模式选择为Enter
	 {
	 sendMessage();
	 }
	 }
	 }
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