//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(); } } }