C# 托盘程序 实例 双击显示窗体，最小化到托盘

单击任务栏  显示-隐藏切换，右键菜单，捕捉关闭窗体事件

 public partial class frmMain : Form
    {
        public frmMain()
        {
            InitializeComponent();
        }


        #region 注销


        public void Logout()
        {
            if (MessageBox.Show("确认要退出吗？", "提示", MessageBoxButtons.OKCancel) == DialogResult.OK)
            {
                notifyIcon1.Visible = false;
                FormCollection fc = Application.OpenForms;
                if (fc != null && fc.Count > 0)
                {
                    foreach (Form window in fc)
                    {
                        window.Hide();
                    }
                }
                CacheHelper.CurrentUsrName = "";
                CacheHelper.CurrentRoleId = 0;
                frmLogin fl = new frmLogin();
                fl.Show();
            }


        }


        private void 注销登陆ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            Logout();
        }


        #endregion


        #region 修改密码


        private void 修改密码ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            frmChangePwd fcp = new frmChangePwd();
            fcp.Show();
        }


        #endregion


        private void frmMain_Load(object sender, EventArgs e)
        {


        }


        private void frmMain_FormClosing(object sender, FormClosingEventArgs e)
        {
            if (MessageBox.Show("确认要退出吗？", "提示", MessageBoxButtons.OKCancel) == DialogResult.OK)
            {
                Logout();
            }
            else
            {
                e.Cancel = true;
            }
        }


        private void 最大化ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            ShowWin();
        }


        private void 退出ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            Logout();
        }


        private void frmMain_SizeChanged(object sender, EventArgs e)
        {
            if (this.WindowState == FormWindowState.Minimized)
            {
                HideWin();
            }
        }


        private void notifyIcon1_MouseClick(object sender, MouseEventArgs e)
        {
            if (e.Button == MouseButtons.Right)
            {
                contextMenuStrip1.Show(MousePosition.X, MousePosition.Y);
            }
            else
            {
                ShowWin();
            }
        }


        #region 隐藏显示窗体


        /// 

        /// 隐藏窗体
        /// 
        private void HideWin()
        {
            this.notifyIcon1.Visible = true;
            this.Hide();
        }


        /// 

        /// 显示主窗体
        /// 
        private void ShowWin()
        {
            if (Visible)
            {
                HideWin();
            }
            else
            {
                /////这里注意顺序很重要，先show 后设置state
                Show();
                WindowState = FormWindowState.Normal;
            }
        }


        #endregion
    }

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