WPF应用程序最小化到系统托盘

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Windows;
using System.Windows.Input;
using System.Windows.Markup;
using System.Windows.Media;
using System.Windows.Threading;
using Drawing = System.Drawing;
using Forms = System.Windows.Forms;

namespace WpfApplication1
{
    /// <summary>
    /// Represents a thin wrapper for <see cref="Forms.NotifyIcon"/>
    /// </summary>
    [ContentProperty("Text")]
    [DefaultEvent("MouseDoubleClick")]
    public class NotificationAreaIcon : FrameworkElement
    {
        Forms.NotifyIcon notifyIcon;

        public static readonly RoutedEvent MouseClickEvent = EventManager.RegisterRoutedEvent(
            "MouseClick", RoutingStrategy.Bubble, typeof(MouseButtonEventHandler), typeof(NotificationAreaIcon));

        public static readonly RoutedEvent MouseDoubleClickEvent = EventManager.RegisterRoutedEvent(
            "MouseDoubleClick", RoutingStrategy.Bubble, typeof(MouseButtonEventHandler), typeof(NotificationAreaIcon));

        public static readonly DependencyProperty IconProperty =
            DependencyProperty.Register("Icon", typeof(ImageSource), typeof(NotificationAreaIcon));

        public static readonly DependencyProperty TextProperty =
            DependencyProperty.Register("Text", typeof(string), typeof(NotificationAreaIcon));

        public static readonly DependencyProperty FormsContextMenuProperty =
            DependencyProperty.Register("MenuItems", typeof(List<Forms.MenuItem>), typeof(NotificationAreaIcon), new PropertyMetadata(new List<Forms.MenuItem>()));

        protected override void OnInitialized(EventArgs e)
        {
            base.OnInitialized(e);

            // Create and initialize the window forms notify icon based
            notifyIcon = new Forms.NotifyIcon();
            notifyIcon.Text = Text;
            if (!DesignerProperties.GetIsInDesignMode(this))
            {
                notifyIcon.Icon = FromImageSource(Icon);
            }
            notifyIcon.Visible = FromVisibility(Visibility);

            if (this.MenuItems != null && this.MenuItems.Count > 0)
            {
                notifyIcon.ContextMenu = new System.Windows.Forms.ContextMenu(this.MenuItems.ToArray());
            }

            notifyIcon.MouseDown += OnMouseDown;
            notifyIcon.MouseUp += OnMouseUp;
            notifyIcon.MouseClick += OnMouseClick;
            notifyIcon.MouseDoubleClick += OnMouseDoubleClick;

            Dispatcher.ShutdownStarted += OnDispatcherShutdownStarted;
        }

        private void OnDispatcherShutdownStarted(object sender, EventArgs e)
        {
            notifyIcon.Dispose();
        }

        private void OnMouseDown(object sender, Forms.MouseEventArgs e)
        {
            OnRaiseEvent(MouseDownEvent, new MouseButtonEventArgs(
                InputManager.Current.PrimaryMouseDevice, 0, ToMouseButton(e.Button)));
        }

        private void OnMouseUp(object sender, Forms.MouseEventArgs e)
        {
            OnRaiseEvent(MouseUpEvent, new MouseButtonEventArgs(
                InputManager.Current.PrimaryMouseDevice, 0, ToMouseButton(e.Button)));
        }

        private void OnMouseDoubleClick(object sender, Forms.MouseEventArgs e)
        {
            OnRaiseEvent(MouseDoubleClickEvent, new MouseButtonEventArgs(
                InputManager.Current.PrimaryMouseDevice, 0, ToMouseButton(e.Button)));
        }

        private void OnMouseClick(object sender, Forms.MouseEventArgs e)
        {
            OnRaiseEvent(MouseClickEvent, new MouseButtonEventArgs(
                InputManager.Current.PrimaryMouseDevice, 0, ToMouseButton(e.Button)));
        }

        private void OnRaiseEvent(RoutedEvent handler, MouseButtonEventArgs e)
        {
            e.RoutedEvent = handler;
            RaiseEvent(e);
        }

        public List<Forms.MenuItem> MenuItems
        {
            get { return (List<Forms.MenuItem>)GetValue(FormsContextMenuProperty); }
            set { SetValue(FormsContextMenuProperty, value); }
        }

        public ImageSource Icon
        {
            get { return (ImageSource)GetValue(IconProperty); }
            set { SetValue(IconProperty, value); }
        }

        public string Text
        {
            get { return (string)GetValue(TextProperty); }
            set { SetValue(TextProperty, value); }
        }

        public event MouseButtonEventHandler MouseClick
        {
            add { AddHandler(MouseClickEvent, value); }
            remove { RemoveHandler(MouseClickEvent, value); }
        }

        public event MouseButtonEventHandler MouseDoubleClick
        {
            add { AddHandler(MouseDoubleClickEvent, value); }
            remove { RemoveHandler(MouseDoubleClickEvent, value); }
        }

        #region Conversion members

        private static Drawing.Icon FromImageSource(ImageSource icon)
        {
            if (icon == null)
            {
                return null;
            }
            Uri iconUri = new Uri(icon.ToString());
            return new Drawing.Icon(Application.GetResourceStream(iconUri).Stream);
        }

        private static bool FromVisibility(Visibility visibility)
        {
            return visibility == Visibility.Visible;
        }

        private MouseButton ToMouseButton(Forms.MouseButtons button)
        {
            switch (button)
            {
                case Forms.MouseButtons.Left:
                    return MouseButton.Left;
                case Forms.MouseButtons.Right:
                    return MouseButton.Right;
                case Forms.MouseButtons.Middle:
                    return MouseButton.Middle;
                case Forms.MouseButtons.XButton1:
                    return MouseButton.XButton1;
                case Forms.MouseButtons.XButton2:
                    return MouseButton.XButton2;
            }
            throw new InvalidOperationException();
        }

        #endregion Conversion members
    }
}

 

 xmlns:forms="clr-namespace:System.Windows.Forms;assembly=System.Windows.Forms"

   <utils:NotificationAreaIcon
            Text="NotificationAreaApplication1"
                      Icon="/Gemr;component/App.ico"
                      MouseDoubleClick="OnNotificationAreaIconDoubleClick" Grid.Row="2">
                <utils:NotificationAreaIcon.MenuItems>
                    <!--Click="OnMenuItemOpenClick"-->
                    <forms:MenuItem Text="Re-login" Click="OnReLoginClick"  DefaultItem="True" />
                    <forms:MenuItem Text="Exit" Click="OnMenuItemExitClick" />
                </utils:NotificationAreaIcon.MenuItems>
            </utils:NotificationAreaIcon>

 #region Notification Icon

        bool shouldClose;
        WindowState lastWindowState;

        protected override void OnStateChanged(EventArgs e)
        {
            this.lastWindowState = WindowState;
        }

        protected override void OnClosing(System.ComponentModel.CancelEventArgs e)
        {
            if (!shouldClose)
            {
                e.Cancel = true;
                Hide();
            }
        }

        private void Open()
        {
            Show();
            WindowState = this.lastWindowState;
        }


        //双击还原
        private void OnNotificationAreaIconDoubleClick(object sender, MouseButtonEventArgs e)
        {
            if (e.ChangedButton == MouseButton.Left)
            {
                Open();
            }
        }

        //re-login

        private void OnReLoginClick(object sender, EventArgs e)
        {
            this.Logout();
        }

        private void OnMenuItemExitClick(object sender, EventArgs e)
        {
            this.shouldClose = true;
            Close();
        }

        #endregion