void BlankPage_CommandsRequested(SettingsPane sender, SettingsPaneCommandsRequestedEventArgs args)
        {
            SettingsCommand cmd = new SettingsCommand("login", "登录", (x) =>
            {
                _settingsPopup = new Popup();
                _settingsPopup.Closed += OnPopupClosed;
                Window.Current.Activated += OnWindowActivated;
                _settingsPopup.IsLightDismissEnabled = true;
                _settingsPopup.Width = _settingsWidth;
                _settingsPopup.Height = _windowBounds.Height;

                SimpleSettingsNarrow mypane = new SimpleSettingsNarrow();
                mypane.Width = _settingsWidth;
                mypane.Height = _windowBounds.Height;

                _settingsPopup.Child = mypane;
                _settingsPopup.SetValue(Canvas.LeftProperty, _windowBounds.Width - _settingsWidth);
                _settingsPopup.SetValue(Canvas.TopProperty, 0);
                _settingsPopup.IsOpen = true;
            });

            args.Request.ApplicationCommands.Add(cmd);

            SettingsCommand cmd1 = new SettingsCommand("logout", "注销", (x) =>
            {
            });

            args.Request.ApplicationCommands.Add(cmd1);
        }

 void Orders_CommandsRequested(SettingsPane sender, SettingsPaneCommandsRequestedEventArgs args)
 {
     args.Request.ApplicationCommands.Add(new SettingsCommand("settings", "Nastavení", (handler) =>
     {
         new Settings().Show();
     }));
 }

        private void CommandsRequested(SettingsPane sender, SettingsPaneCommandsRequestedEventArgs args)
        {
            args.Request.ApplicationCommands.Add(new SettingsCommand("about", "About", x =>
            {
                _flyout = new SettingsFlyout
                {
                    HeaderText = "About",
                    Content = new AboutView(),
                    IsOpen = true,
                    ContentBackgroundBrush = new SolidColorBrush(Colors.Black),
                    ContentForegroundBrush = new SolidColorBrush(Colors.White)
                };
            }));
            args.Request.ApplicationCommands.Add(new SettingsCommand("privacy", "Privacy", x =>
            {
                _flyout = new SettingsFlyout
                {
                    HeaderText = "Privacy",
                    Content = new PrivacyView(),
                    IsOpen = true,
                    ContentBackgroundBrush = new SolidColorBrush(Colors.Black),
                    ContentForegroundBrush = new SolidColorBrush(Colors.White)
                };

            }));
        }

        private void ConfigureSettings(SettingsPane sender, SettingsPaneCommandsRequestedEventArgs args)
        {
            var settingsColor = App.Current.Resources["MainAppColor"] as SolidColorBrush;

            var aboutCommand = new SettingsCommand("about", "About MetroPass", a => DialogService.ShowSettingsFlyout<AboutSettingsViewModel>(headerBrush: settingsColor));
            args.Request.ApplicationCommands.Add(aboutCommand);

            var dataSource = _bootstrapper.GetInstance<IPWDatabaseDataSource>();
            var dbOptionsCommand = new SettingsCommand("databaseOptions", "Database Options", h =>
            {
                if (dataSource.PwDatabase != null)
                {
                    DialogService.ShowSettingsFlyout<DatabaseSettingsViewModel>( onClosed: SettingsClosed, headerBrush: settingsColor);
                }
                else
                {
                    DialogService.ShowSettingsFlyout<DatabaseClosedSettingsViewModel>(headerBrush: settingsColor);
                }
            });
            args.Request.ApplicationCommands.Add(dbOptionsCommand);

            var appOptionsCommand = new SettingsCommand("metroPassOptions", "MetroPass Options", h => DialogService.ShowSettingsFlyout<AppSettingsViewModel>( headerBrush: settingsColor));
            args.Request.ApplicationCommands.Add(appOptionsCommand);

            var privacyPolicyCommand = new SettingsCommand("privacyPolicy", "Privacy Policy", a => LaunchUrl(PrivacyPolicyUrl));
            args.Request.ApplicationCommands.Add(privacyPolicyCommand);

            var supportCommand = new SettingsCommand("support", "Support & Feedback", a => LaunchUrl(SupportUrl));
            args.Request.ApplicationCommands.Add(supportCommand);

        }

        private void BlankPage_CommandsRequested(SettingsPane sender, SettingsPaneCommandsRequestedEventArgs args)
        {
            SettingsCommand cmd = new SettingsCommand("sample", "Sample Custom Setting", (x) =>
            {
                // create a new instance of the flyout
                SettingsFlyout settings = new SettingsFlyout();
                // set the desired width.  If you leave this out, you will get Narrow (346px)
                settings.FlyoutWidth = (Callisto.Controls.SettingsFlyout.SettingsFlyoutWidth)Enum.Parse(typeof(Callisto.Controls.SettingsFlyout.SettingsFlyoutWidth), settingswidth.SelectionBoxItem.ToString());

                // optionally change header and content background colors away from defaults (recommended)
                // if using Callisto's AppManifestHelper you can grab the element from some member var you held it in
                // settings.HeaderBrush = new SolidColorBrush(App.VisualElements.BackgroundColor);
                settings.HeaderBrush = new SolidColorBrush(Colors.Orange);
                settings.HeaderText = string.Format("{0} Custom Settings", App.VisualElements.DisplayName);

                // provide some logo (preferrably the smallogo the app uses)
                BitmapImage bmp = new BitmapImage(App.VisualElements.SmallLogoUri);
                settings.SmallLogoImageSource = bmp;

                // set the content for the flyout
                settings.Content = new SettingsContent();

                // open it
                settings.IsOpen = true;

                // this is only for the test app and not needed
                // you would not use this code in your real app
                ObjectTracker.Track(settings);
            });

            args.Request.ApplicationCommands.Add(cmd);
        }

        private void SettingsCommandRequested(SettingsPane sender, SettingsPaneCommandsRequestedEventArgs args)
        {
            var privacyCommand = new SettingsCommand("privacy", Strings.PrivacyStatement,
                async h => await Launcher.LaunchUriAsync(new Uri("http://videolan.org/vlc/privacy.html")));

            var specialThanks = new SettingsCommand("specialThanks", Strings.SpecialThanks,
                command =>
                {
                    Locator.NavigationService.Go(VLCPage.SpecialThanksPage);
                });

            var settings = new SettingsCommand("settings", Strings.Settings,
                command =>
                {
                    Locator.NavigationService.Go(VLCPage.SettingsPage);
                });
            var license = new SettingsCommand("license", Strings.License, command =>
            {
                Locator.NavigationService.Go(VLCPage.LicensePage);
            });
            args.Request.ApplicationCommands.Clear();
            args.Request.ApplicationCommands.Add(privacyCommand);
            args.Request.ApplicationCommands.Add(specialThanks);
            args.Request.ApplicationCommands.Add(settings);
            args.Request.ApplicationCommands.Add(license);
        }

        private void SetCommandsRequested(SettingsPane sender, SettingsPaneCommandsRequestedEventArgs args)
        {
            SettingsCommand cmd = new SettingsCommand(
                 "sample",
                 "Feedback",
                 (x) =>
                 {
                     // create a new instance of the flyout
                     SettingsFlyout settings = new SettingsFlyout();
                     settings.Title = "Provide Feedback";
                     BitmapImage bitmap = new BitmapImage(new Uri("ms-appx:///Assets/SmallLogo.png"));
                     settings.IconSource = bitmap;

                     // set the content for the flyout
                     var settingsContent = new FeedbackContent();
                     settingsContent.FeedbackSent += (s, e) =>
                     {
                         settings.Hide();
                     };

                     settings.HorizontalContentAlignment = Windows.UI.Xaml.HorizontalAlignment.Stretch;
                     settings.Content = settingsContent;

                     // open it
                     settings.Show();
                 });

            args.Request.ApplicationCommands.Add(cmd);
        }

 private void CommandsRequested(SettingsPane sender, SettingsPaneCommandsRequestedEventArgs args)
 {
     args.Request.ApplicationCommands.Add(new SettingsCommand("a", "Privacy Policy", (p) => { PrivacyCharm.IsOpen = true; }));
     args.Request.ApplicationCommands.Add(new SettingsCommand("b", "How does it work?", (p) => { HowCharm.IsOpen = true; }));
     args.Request.ApplicationCommands.Add(new SettingsCommand("s", "Developed By", (p) => { DevelopedBy.IsOpen = true; }));
     args.Request.ApplicationCommands.Add(new SettingsCommand("s", "Rate AzureSQLMonitor", (p) => { RateApp.IsOpen = true; }));
 }

        void CommandsRequested(SettingsPane sender, SettingsPaneCommandsRequestedEventArgs args)
        {
            UICommandInvokedHandler handler = new UICommandInvokedHandler(onSettingsCommand);

            SettingsCommand policyCommand = new SettingsCommand("policyCommand", "Privacy Policy", handler);
            args.Request.ApplicationCommands.Add(policyCommand);
        }

        // <snippet519>
        public void OnCommandsRequested(SettingsPane sender, SettingsPaneCommandsRequestedEventArgs args)
        {
            if (args == null || args.Request == null || args.Request.ApplicationCommands == null
                || _getSettingsCharmItems == null)
            {
                return;
            }

            var applicationCommands = args.Request.ApplicationCommands;
            var settingsCharmItems = _getSettingsCharmItems();

            foreach (var settingsCharmItem in settingsCharmItems)
            {
                var notFound = applicationCommands.FirstOrDefault(
                    (settingsCommand) => settingsCommand.Id.ToString() == settingsCharmItem.FlyoutName) == null;
                if (notFound)
                {
                    SettingsCommand cmd = new SettingsCommand(settingsCharmItem.FlyoutName,
                                                              settingsCharmItem.SettingsCharmTitle,
                                                              (o) =>
                                                              _flyoutService.ShowFlyout(settingsCharmItem.FlyoutName));
                                                                  
                    applicationCommands.Add(cmd);
                }
            }
        }

 private void CommandsRequested(SettingsPane sender, SettingsPaneCommandsRequestedEventArgs args) {
     SettingsCommand about = new SettingsCommand("About", "About", About_Click);
     SettingsCommand privacy = new SettingsCommand("Privacy", "Privacy Policy", PrivacyPolicy_Click);
     SettingsCommand history = new SettingsCommand("History", "Clear History", ClearHistory_Click);
     args.Request.ApplicationCommands.Add(about);
     args.Request.ApplicationCommands.Add(privacy);
     args.Request.ApplicationCommands.Add(history); }

 private void OnCommandsRequested(SettingsPane sender, SettingsPaneCommandsRequestedEventArgs args)
 {
     var menuCommand = new SettingsCommand("handwritingSettings", "Handwriting options", OnHandwritingSettingsCommand);
     args.Request.ApplicationCommands.Add(menuCommand);
     menuCommand = new SettingsCommand("about", "About", OnAboutCommand);
     args.Request.ApplicationCommands.Add(menuCommand);
 }

        private void OnCommandsRequested(SettingsPane sender, SettingsPaneCommandsRequestedEventArgs args)
        {
            // Add an About command
            var about = new SettingsCommand("about", "About", handler =>
                {
                    var settings = new SettingsFlyout();
                    settings.Content = new AboutUserControl();
                    settings.HeaderBrush = new SolidColorBrush(Colors.Magenta);
                    settings.Background = new SolidColorBrush(Colors.LightGreen);
                    settings.ContentBackgroundBrush = new SolidColorBrush(Colors.LightGreen);
                    settings.HeaderText = "About";
                    settings.IsOpen = true;
                });

            args.Request.ApplicationCommands.Add(about);

            var preferences = new SettingsCommand("preferences", "Preferences", (handler) =>
            {
                var settings = new SettingsFlyout();
                settings.Content = new PreferencesUserControl();
                settings.HeaderBrush = new SolidColorBrush(Colors.Magenta);
                settings.Background = new SolidColorBrush(Colors.LightGreen);
                settings.ContentBackgroundBrush = new SolidColorBrush(Colors.LightGreen);
                settings.HeaderText = "Preferences";
                settings.IsOpen = true;
            });

            args.Request.ApplicationCommands.Add(preferences);
        }

 private void SettingsPane_CommandsRequested(SettingsPane sender, SettingsPaneCommandsRequestedEventArgs args)
 {
     if (this.OnSettingsRequested != null)
     {
         this.OnSettingsRequested(args.Request.ApplicationCommands);
     }
 }

        void MainPage_CommandsRequested(SettingsPane sender, SettingsPaneCommandsRequestedEventArgs args)
        {
            if (!settingPanelInitialized)
            {
                SettingsCommand cmd = new SettingsCommand("AIMine", "Layout Options", (x) =>
                {
                    _settingsPopup = new Popup();
                    _settingsPopup.Closed += OnPopupClosed;
                    Window.Current.Activated += OnWindowActivated;
                    _settingsPopup.IsLightDismissEnabled = true;
                    _settingsPopup.Width = _settingsWidth;
                    _settingsPopup.Height = _windowBounds.Height;

                    SimpleSettingsNarrow mypane = new SimpleSettingsNarrow();
                    mypane.Width = _settingsWidth;
                    mypane.Height = _windowBounds.Height;

                    _settingsPopup.Child = mypane;
                    _settingsPopup.SetValue(Canvas.LeftProperty, _windowBounds.Width - _settingsWidth);
                    _settingsPopup.SetValue(Canvas.TopProperty, 0);
                    _settingsPopup.IsOpen = true;
                });
                args.Request.ApplicationCommands.Add(cmd);
                settingPanelInitialized = true;
            }
        }

void BlankPage_CommandsRequested(SettingsPane sender, SettingsPaneCommandsRequestedEventArgs args)
{
    // 新建一个命令
    SettingsCommand cmd = new SettingsCommand("login", "登录", (x) =>
    {
        // 新建一个Popup，并将其宽度设置为346，高度与屏幕一致
        _settingsPopup = new Popup();
        _settingsPopup.Width = 346;
        _settingsPopup.Height = Window.Current.Bounds.Height;
        _settingsPopup.IsLightDismissEnabled = true;

        // 新建一个页面,并设置该页面的相关属性（大小，位置）
        LoginPane mypane = new LoginPane();
        mypane.Height = Window.Current.Bounds.Height;
        mypane.Width = 346;
        _settingsPopup.Child = mypane;
        _settingsPopup.SetValue(Canvas.LeftProperty, Window.Current.Bounds.Width - 346);
        _settingsPopup.IsOpen = true;
    });

    args.Request.ApplicationCommands.Add(cmd);

    SettingsCommand cmd1 = new SettingsCommand("logout", "注销", (x) =>
    {
    });

    args.Request.ApplicationCommands.Add(cmd1);
}

        void CommandsRequested(SettingsPane sender, SettingsPaneCommandsRequestedEventArgs args)
        {
            var command = new SettingsCommand("settings", "Settings", (x) => {
                this._settingsPopup = new Popup();
                this._settingsPopup.Closed += this.SettingsPopupClosed;
                this._settingsPopup.Opened += this.SettingsPopupOpened;
                this._settingsPopup.IsLightDismissEnabled = true;
                this._settingsPopup.Width = this._settingsWidth;
                this._settingsPopup.Height = this._windowsBounds.Height;

                var settingsPane = new ApplicationSettings();

                settingsPane.Width = this._settingsWidth;
                settingsPane.Height = this._windowsBounds.Height;

                this._settingsPopup.Child = settingsPane;
                this._settingsPopup.SetValue(Canvas.LeftProperty, this._windowsBounds.Width - this._settingsWidth);
                this._settingsPopup.SetValue(Canvas.TopProperty, 0);
                this._settingsPopup.IsOpen = true;

                Window.Current.Activated += OnWindowActivated;
            });

            args.Request.ApplicationCommands.Add(command);
        }

        ///////////////////////////////////////////////////////////////////////////////////
        // Update with URLs to About, Support and Privacy Policy Web Pages
        ///////////////////////////////////////////////////////////////////////////////////
        void settingsPane_CommandsRequested(SettingsPane sender, SettingsPaneCommandsRequestedEventArgs args)
        {
            var rl = new ResourceLoader();

            var aboutCmd = new SettingsCommand("About", rl.GetString("SETTINGS_PANEL_CMD_ABOUT"), async (x) =>
            {
                await Launcher.LaunchUriAsync(new Uri(""));
            });

            args.Request.ApplicationCommands.Add(aboutCmd);

            var supportCmd = new SettingsCommand("Support", rl.GetString("SETTINGS_PANEL_CMD_SUPPORT"), async (x) =>
            {
                await Launcher.LaunchUriAsync(new Uri(""));
            });

            args.Request.ApplicationCommands.Add(supportCmd);

            var policyCmd = new SettingsCommand("PrivacyPolicy", rl.GetString("SETTINGS_PANEL_CMD_PRIVACY_POLICY"), async (x) =>
            {
                await Launcher.LaunchUriAsync(new Uri(""));
            });

            args.Request.ApplicationCommands.Add(policyCmd);
        }

 private void SettingsPaneOnCommandsRequested(SettingsPane sender, SettingsPaneCommandsRequestedEventArgs args)
 {
     if (GetCommandsAction != null)
     {
         GetCommandsAction(args.Request.ApplicationCommands);
     }
 }

        private void BlankPage_CommandsRequested(SettingsPane sender, SettingsPaneCommandsRequestedEventArgs args)
        {
            SettingsCommand cmd = new SettingsCommand("sample", "Sample Custom Setting", (x) =>
            {
                // create a new instance of the flyout
                SettingsFlyout settings = new SettingsFlyout();
                // set the desired width.  If you leave this out, you will get Narrow (346px)
                settings.FlyoutWidth = (Callisto.Controls.SettingsFlyout.SettingsFlyoutWidth)Enum.Parse(typeof(Callisto.Controls.SettingsFlyout.SettingsFlyoutWidth), settingswidth.SelectionBoxItem.ToString());

                // optionally change header and content background colors away from defaults (recommended)
                //settings.Background = new SolidColorBrush(Colors.Red);
                settings.HeaderBrush = new SolidColorBrush(Colors.Orange);
                settings.HeaderText = "Foo Bar Custom Settings";

                // provide some logo (preferrably the smallogo the app uses)
                BitmapImage bmp = new BitmapImage(new Uri("ms-appx:///Assets/SmallLogo.png"));
                settings.SmallLogoImageSource = bmp;

                // set the content for the flyout
                settings.Content = new SettingsContent();

                // open it
                settings.IsOpen = true;

                // this is only for the test app and not needed
                // you would not use this code in your real app
                ObjectTracker.Track(settings);
            });

            args.Request.ApplicationCommands.Add(cmd);
        }