WinForm 登录窗体 + 单实例运行

关于怎么在winform里增加登录窗体或者如何让winform程序单实例运行网上都很多例子。

然而两者结合起来呢？

//Program.cs

  static class Program
    {
        public static EventWaitHandle ProgramStarted;

        /// <summary>
        /// The main entry point for the application.
        /// </summary>
        [STAThread]
        static void Main()
        {
            bool createNew;
            ProgramStarted = new EventWaitHandle(false, EventResetMode.AutoReset, "MSFTD_SERVICE", out createNew);

            if (!createNew)
            {
                ProgramStarted.Set();
                return;
            }

            Application.EnableVisualStyles();
            Application.SetCompatibleTextRenderingDefault(false);

            AppDomain.CurrentDomain.UnhandledException += new UnhandledExceptionEventHandler(CurrentDomain_UnhandledException);
            Application.ThreadException += new System.Threading.ThreadExceptionEventHandler(Application_ThreadException);

            try
            {
                LoginForm LoginForm = new LoginForm();
                if (LoginForm.ShowDialog() == DialogResult.OK)
                {
                    Application.Run(new MainForm());
                }
            }
            catch (Exception ex)
            {
                //TODO
            }
        }

        static void CurrentDomain_UnhandledException(object sender, UnhandledExceptionEventArgs e)
        {
            //TODO
        }

        static void Application_ThreadException(object sender, System.Threading.ThreadExceptionEventArgs e)
        {
            //TODO
        }
    }

//LoginForm.cs

public partial class LoginForm : Form
    {
        RegisteredWaitHandle handle;

        public LoginForm()
        {
            InitializeComponent();
            handle = ThreadPool.RegisterWaitForSingleObject(Program.ProgramStarted, OnProgramStarted, null, -1, false);
        }

        void OnProgramStarted(object state, bool timeout)
        {
            this.Invoke((MethodInvoker)delegate
            {
                this.Show();
                this.WindowState = FormWindowState.Normal;
                this.Activate();
            });
        }　　　　　private void btn_Login_Click(object sender, EventArgs e)
        {　　　　　　 handle.Unregister(null);　　　　　　　　 this.DialogResult = DialogResult.OK;        }

//MainForm.cs

public partial class MainForm : Form
    {
        #region init method, when user try to run two exe at the same time, show tips
        public MainForm()
        {
            InitializeComponent();

            this.SizeChanged += OnSizeChanged;
            ThreadPool.RegisterWaitForSingleObject(Program.ProgramStarted, OnProgramStarted, null, -1, false);
            this.WindowState = FormWindowState.Normal;
        }

        void OnSizeChanged(object sender, EventArgs e)
        {
            if (this.WindowState == FormWindowState.Minimized)
            {
                this.notifyIcon.ShowBalloonTip(2000, "MSFTD Service", "MSFTD Service is running.", ToolTipIcon.Info);
                this.Visible = false;
            }
        }

        private void notifyIcon_MouseDoubleClick(object sender, MouseEventArgs e)
        {
            this.Visible = true;
            this.WindowState = FormWindowState.Normal;
        }

        void OnProgramStarted(object state, bool timeout)
        {
            this.Invoke((MethodInvoker)delegate
            {
                this.notifyIcon.ShowBalloonTip(2000, "MSFTD Service", "MSFTD Service is running.", ToolTipIcon.Info);
                this.Show();
                this.WindowState = FormWindowState.Normal;
                this.Activate();
            });
        }
        #endregion
    }

来源：https://www.cnblogs.com/AlvinLiang/p/4976600.html

标签

winform