chat_frm.cs

C#实现的网络编程实验聊天程序(含论文)

        /// <summary>
        /// 通过窗体右上角关闭窗体
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void chat_frm_FormClosing(object sender, FormClosingEventArgs e)
        {
            if (e.CloseReason == CloseReason.UserClosing)
            {
                e.Cancel = true;
            }
            if (e.CloseReason == CloseReason.FormOwnerClosing)
            {
                return;
            }
            close_btn_Click(sender, e);
        }

        /// <summary>
        /// 发送消息，将接受方用户名和消息正文分开发送，便于服务器端处理
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void send_btn_Click(object sender, EventArgs e)
        {
            string localTxt = null;
            string sendTxt = null;
            string msg = msg_tb.Text.Trim();
            if (msg == string.Empty)
            {
                MessageBox.Show("不能发送空消息",
                                "提示",
                                MessageBoxButtons.OK,
                                MessageBoxIcon.Information);
                return;
            }

            //如果是聊天室模式则向服务器发送广播请求
            if (broadcast_rb.Checked)
            {
                localTxt = string.Format("[广播]您在 {0} 对所有人说：\r\n{1}\r\n\r\n", DateTime.Now, msg);
                sendTxt  = string.Format("[广播]{0} 在 {1} 对所有人说：\r\n{2}\r\n\r\n", _username, DateTime.Now, msg);
                //发送广播请求
                _nws.Write(new byte[] { 0, 5 }, 0, 2);
            }
            else
            {
                string _receiver = online_cb.Text;
                if (_receiver == string.Empty)
                {
                    MessageBox.Show("请选择一个接收者！\n如果没有接受者可选，表明当前只有您一个人在线\t",
                                    "发送消息",
                                    MessageBoxButtons.OK,
                                    MessageBoxIcon.Information);
                    return;
                }
                localTxt = string.Format("[私聊]您在 {0} 对 {1} 说：\r\n{2}\r\n\r\n", DateTime.Now, _receiver, msg);
                sendTxt  = string.Format("[私聊]{0} 在 {1} 对您说：\r\n{2}\r\n\r\n", _username, DateTime.Now, msg);
                //发送接受者用户名
                _nws.Write(Encoding.Unicode.GetBytes(_receiver), 0, Encoding.Unicode.GetBytes(_receiver).Length);
            }
            _nws.Write(Encoding.Unicode.GetBytes(sendTxt), 0, Encoding.Unicode.GetBytes(sendTxt).Length);

            chatrcd_rtb.AppendText(localTxt);
            msg_tb.Clear();
        }

        /// <summary>
        /// 有新消息来时闪烁任务栏并且保持聊天记录内容滚动到最底端，QQ就是这么玩滴~
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        [DllImport("user32.dll")]
        public static extern bool FlashWindow(IntPtr hWnd, bool bInvert);
        private void chatrcd_rtb_TextChanged(object sender, EventArgs e)
        {
            chatrcd_rtb.ScrollToCaret();
            if (this.WindowState == FormWindowState.Minimized)
            {
                FlashWindow(this.Handle, true);
            }
        }

        /// <summary>
        /// 当窗口恢复后取消任务栏的闪烁效果
        /// 当窗口最小化时判断是否要隐藏到系统托盘
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void chat_frm_SizeChanged(object sender, EventArgs e)
        {
            switch (this.WindowState)
            {
                case FormWindowState.Normal:
                    FlashWindow(this.Handle, false);
                    break;
                case FormWindowState.Minimized:
                    if (_hideFlag)
                    {
                        notifyIcon1.Visible = true;
                        this.Visible = false;
                    }
                    break;
                default:
                    break;
            }
        }

        /// <summary>
        /// 在线列表下拉框显示之前向服务器发送请求在线列表的命令
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void online_cb_DropDown(object sender, EventArgs e)
        {
            _nws.Write(new byte[] { 0, 2 }, 0, 2);
        }

        /// <summary>
        /// 聊天模式改变
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void broadcast_rb_CheckedChanged(object sender, EventArgs e)
        {
            if (private_rb.Checked)
            {
                online_cb.Enabled = true;
            }
            else
            {
                online_cb.Enabled = false;
            }
        }

        /// <summary>
        /// 设置最小化到系统托盘的标记值
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void hide_cb_CheckedChanged(object sender, EventArgs e)
        {
            _hideFlag = hide_cb.Checked;
        }

        /// <summary>
        /// 产生闪屏振动效果
        /// </summary>
        private void Nudge()
        {
            if (notifyIcon1.Visible == true)
            {
                return;
            }
            if (this.WindowState == FormWindowState.Minimized)
            {
                this.WindowState = FormWindowState.Normal;
            }
            int i = 0;
            Point _old = this.Location;
            Point _new1 = new Point(_old.X + 2, _old.Y + 2);
            Point _new2 = new Point(_old.X - 2, _old.Y - 2);
            _sp2.Play();
            while (i < 4)
            {
                this.Location = _new1;
                Thread.Sleep(60);
                this.Location = _new2;
                Thread.Sleep(60);
                i++;
            }
            this.Location = _old;
        }

        /// <summary>
        /// 发送闪屏振动
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void nudge_pb_Click(object sender, EventArgs e)
        {
            string displayTxt = null;
            if (private_rb.Checked && online_cb.Text == string.Empty)
            {
                MessageBox.Show("非聊天室模式下必须先选择一个接收者！",
                                "发送闪屏振动",
                                MessageBoxButtons.OK,
                                MessageBoxIcon.Information);
                return;
            }
            if (private_rb.Checked)
            {
                _nws.Write(new byte[] { 0, 4 }, 0, 2);
                string _receiver = online_cb.Text;
                _nws.Write(Encoding.Unicode.GetBytes(_receiver), 0, Encoding.Unicode.GetBytes(_receiver).Length);
                displayTxt = string.Format("[系统提示]您向 {0} 发送了一个闪屏振动。\r\n\r\n", _receiver);
            }
            else
            {
                _nws.Write(new byte[] { 0, 3 }, 0, 2);
                displayTxt = "[系统提示]您向所有人发送了一个闪屏振动。\r\n\r\n";
            }
            chatrcd_rtb.AppendText(displayTxt);
            Nudge();
        }

        /// <summary>
        /// 以下是系统托盘菜单的处理函数
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void close_tsmi_Click(object sender, EventArgs e)
        {
            close_btn_Click(sender, e);
        }
        private void notifyIcon1_DoubleClick(object sender, EventArgs e)
        {
            comeback_tsmi_Click(sender, e);
        }
        private void comeback_tsmi_Click(object sender, EventArgs e)
        {
            notifyIcon1.Visible = false;
            this.Visible = true;
            this.WindowState = FormWindowState.Normal;
            this.BringToFront();
        }

        #endregion
    }
}