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How to use LoadStateEventArgs method of AppUIBasics.Common.NavigationHelper class

Best WinAppDriver code snippet using AppUIBasics.Common.NavigationHelper.LoadStateEventArgs

NavigationHelper.cs

Source:NavigationHelper.cs

...37    ///         this.navigationHelper.LoadState += navigationHelper_LoadState;38    ///         this.navigationHelper.SaveState += navigationHelper_SaveState;39    ///     }40    ///41    ///     private void navigationHelper_LoadState(object sender, LoadStateEventArgs e)42    ///     { }43    ///     private void navigationHelper_SaveState(object sender, LoadStateEventArgs e)44    ///     { }45    /// </code>46    ///47    /// 2) Register the page to call into the NavigationManager whenever the page participates48    ///     in navigation by overriding the <see cref="Windows.UI.Xaml.Controls.Page.OnNavigatedTo"/>49    ///     and <see cref="Windows.UI.Xaml.Controls.Page.OnNavigatedFrom"/> events.50    /// <code>51    ///     protected override void OnNavigatedTo(NavigationEventArgs e)52    ///     {53    ///         navigationHelper.OnNavigatedTo(e);54    ///     }55    ///56    ///     protected override void OnNavigatedFrom(NavigationEventArgs e)57    ///     {58    ///         navigationHelper.OnNavigatedFrom(e);59    ///     }60    /// </code>61    /// </example>62    [Windows.Foundation.Metadata.WebHostHidden]63    public class NavigationHelper : DependencyObject64    {65        private Page Page { get; set; }66        private Frame Frame { get { return this.Page.Frame; } }67        /// <summary>68        /// Initializes a new instance of the <see cref="NavigationHelper"/> class.69        /// </summary>70        /// <param name="page">A reference to the current page used for navigation.71        /// This reference allows for frame manipulation.</param>72        public NavigationHelper(Page page)73        {74            this.Page = page;75        }76        #region Process lifetime management77        private string _pageKey;78        /// <summary>79        /// Handle this event to populate the page using content passed80        /// during navigation as well as any state that was saved by81        /// the SaveState event handler.82        /// </summary>83        public event LoadStateEventHandler LoadState;84        /// <summary>85        /// Handle this event to save state that can be used by86        /// the LoadState event handler. Save the state in case87        /// the application is suspended or the page is discarded88        /// from the navigation cache.89        /// </summary>90        public event SaveStateEventHandler SaveState;91        /// <summary>92        /// Invoked when this page is about to be displayed in a Frame.93        /// This method calls <see cref="LoadState"/>, where all page specific94        /// navigation and process lifetime management logic should be placed.95        /// </summary>96        /// <param name="e">Event data that describes how this page was reached.  The Parameter97        /// property provides the group to be displayed.</param>98        public void OnNavigatedTo(NavigationEventArgs e)99        {100            var frameState = SuspensionManager.SessionStateForFrame(this.Frame);101            this._pageKey = "Page-" + this.Frame.BackStackDepth;102            if (e.NavigationMode == NavigationMode.New)103            {104                // Clear existing state for forward navigation when adding a new page to the105                // navigation stack106                var nextPageKey = this._pageKey;107                int nextPageIndex = this.Frame.BackStackDepth;108                while (frameState.Remove(nextPageKey))109                {110                    nextPageIndex++;111                    nextPageKey = "Page-" + nextPageIndex;112                }113                // Pass the navigation parameter to the new page114                this.LoadState?.Invoke(this, new LoadStateEventArgs(e.Parameter, null));115            }116            else117            {118                // Pass the navigation parameter and preserved page state to the page, using119                // the same strategy for loading suspended state and recreating pages discarded120                // from cache121                this.LoadState?.Invoke(this, new LoadStateEventArgs(e.Parameter, (Dictionary<string, object>)frameState[this._pageKey]));122            }123        }124        /// <summary>125        /// Invoked when this page will no longer be displayed in a Frame.126        /// This method calls <see cref="SaveState"/>, where all page specific127        /// navigation and process lifetime management logic should be placed.128        /// </summary>129        /// <param name="e">Event data that describes how this page was reached.  The Parameter130        /// property provides the group to be displayed.</param>131        public void OnNavigatedFrom(NavigationEventArgs e)132        {133            var frameState = SuspensionManager.SessionStateForFrame(this.Frame);134            var pageState = new Dictionary<string, object>();135            this.SaveState?.Invoke(this, new SaveStateEventArgs(pageState));136            frameState[_pageKey] = pageState;137        }138        #endregion139    }140    /// <summary>141    /// RootFrameNavigationHelper registers for standard mouse and keyboard142    /// shortcuts used to go back and forward. There should be only one143    /// RootFrameNavigationHelper per view, and it should be associated with the144    /// root frame.145    /// </summary>146    /// <example>147    /// To make use of RootFrameNavigationHelper, create an instance of the148    /// RootNavigationHelper such as in the constructor of your root page.149    /// <code>150    ///     public MyRootPage()151    ///     {152    ///         this.InitializeComponent();153    ///         this.rootNavigationHelper = new RootNavigationHelper(MyFrame);154    ///     }155    /// </code>156    /// </example>157    [Windows.Foundation.Metadata.WebHostHidden]158    public class RootFrameNavigationHelper159    {160        private Frame Frame { get; set; }161        SystemNavigationManager systemNavigationManager;162        private Microsoft.UI.Xaml.Controls.NavigationView CurrentNavView { get; set; }163        /// <summary>164        /// Initializes a new instance of the <see cref="RootNavigationHelper"/> class.165        /// </summary>166        /// <param name="rootFrame">A reference to the top-level frame.167        /// This reference allows for frame manipulation and to register navigation handlers.</param>168        public RootFrameNavigationHelper(Frame rootFrame, Microsoft.UI.Xaml.Controls.NavigationView currentNavView)169        {170            this.Frame = rootFrame;171            this.Frame.Navigated += (s, e) =>172            {173                // Update the Back button whenever a navigation occurs.174                UpdateBackButton();175            };176            this.CurrentNavView = currentNavView;177            // Handle keyboard and mouse navigation requests178            this.systemNavigationManager = SystemNavigationManager.GetForCurrentView();179            systemNavigationManager.BackRequested += SystemNavigationManager_BackRequested;180            // must register back requested on navview181            if (ApiInformation.IsApiContractPresent("Windows.Foundation.UniversalApiContract", 6))182            {183                CurrentNavView.BackRequested += NavView_BackRequested;184            }185            // Listen to the window directly so we will respond to hotkeys regardless186            // of which element has focus.187            Window.Current.CoreWindow.Dispatcher.AcceleratorKeyActivated +=188                CoreDispatcher_AcceleratorKeyActivated;189            Window.Current.CoreWindow.PointerPressed +=190                this.CoreWindow_PointerPressed;191        }192        private void NavView_BackRequested(Microsoft.UI.Xaml.Controls.NavigationView sender, Microsoft.UI.Xaml.Controls.NavigationViewBackRequestedEventArgs args)193        {194            TryGoBack();195        }196        private bool TryGoBack()197        {198            // don't go back if the nav pane is overlayed199            if (this.CurrentNavView.IsPaneOpen && (this.CurrentNavView.DisplayMode == Microsoft.UI.Xaml.Controls.NavigationViewDisplayMode.Compact || this.CurrentNavView.DisplayMode == Microsoft.UI.Xaml.Controls.NavigationViewDisplayMode.Minimal))200            {201                return false;202            }203            bool navigated = false;204            if (this.Frame.CanGoBack)205            {206                this.Frame.GoBack();207                navigated = true;208            }209            210            return navigated;211        }212        private bool TryGoForward()213        {214            bool navigated = false;215            if (this.Frame.CanGoForward)216            {217                this.Frame.GoForward();218                navigated = true;219            }220            return navigated;221        }222        private void SystemNavigationManager_BackRequested(object sender, BackRequestedEventArgs e)223        {224            if (!e.Handled)225            {226                e.Handled = TryGoBack();227            }228        }229        private void UpdateBackButton()230        {231            if (ApiInformation.IsApiContractPresent("Windows.Foundation.UniversalApiContract", 6))232            {233                this.CurrentNavView.IsBackEnabled = this.Frame.CanGoBack ? true : false;234            } else235            {236                systemNavigationManager.AppViewBackButtonVisibility = this.Frame.CanGoBack ? AppViewBackButtonVisibility.Visible : AppViewBackButtonVisibility.Collapsed;237            }238            239        }240        /// <summary>241        /// Invoked on every keystroke, including system keys such as Alt key combinations.242        /// Used to detect keyboard navigation between pages even when the page itself243        /// doesn't have focus.244        /// </summary>245        /// <param name="sender">Instance that triggered the event.</param>246        /// <param name="e">Event data describing the conditions that led to the event.</param>247        private void CoreDispatcher_AcceleratorKeyActivated(CoreDispatcher sender,248            AcceleratorKeyEventArgs e)249        {250            var virtualKey = e.VirtualKey;251            // Only investigate further when Left, Right, or the dedicated Previous or Next keys252            // are pressed253            if ((e.EventType == CoreAcceleratorKeyEventType.SystemKeyDown ||254                e.EventType == CoreAcceleratorKeyEventType.KeyDown) &&255                (virtualKey == VirtualKey.Left || virtualKey == VirtualKey.Right ||256                (int)virtualKey == 166 || (int)virtualKey == 167))257            {258                var coreWindow = Window.Current.CoreWindow;259                var downState = CoreVirtualKeyStates.Down;260                bool menuKey = (coreWindow.GetKeyState(VirtualKey.Menu) & downState) == downState;261                bool controlKey = (coreWindow.GetKeyState(VirtualKey.Control) & downState) == downState;262                bool shiftKey = (coreWindow.GetKeyState(VirtualKey.Shift) & downState) == downState;263                bool noModifiers = !menuKey && !controlKey && !shiftKey;264                bool onlyAlt = menuKey && !controlKey && !shiftKey;265                if (((int)virtualKey == 166 && noModifiers) ||266                    (virtualKey == VirtualKey.Left && onlyAlt))267                {268                    // When the previous key or Alt+Left are pressed navigate back269                    e.Handled = TryGoBack();270                }271                else if (((int)virtualKey == 167 && noModifiers) ||272                    (virtualKey == VirtualKey.Right && onlyAlt))273                {274                    // When the next key or Alt+Right are pressed navigate forward275                    e.Handled = TryGoForward();276                }277            }278        }279        /// <summary>280        /// Invoked on every mouse click, touch screen tap, or equivalent interaction.281        /// Used to detect browser-style next and previous mouse button clicks282        /// to navigate between pages.283        /// </summary>284        /// <param name="sender">Instance that triggered the event.</param>285        /// <param name="e">Event data describing the conditions that led to the event.</param>286        private void CoreWindow_PointerPressed(CoreWindow sender,287            PointerEventArgs e)288        {289            var properties = e.CurrentPoint.Properties;290            // Ignore button chords with the left, right, and middle buttons291            if (properties.IsLeftButtonPressed || properties.IsRightButtonPressed ||292                properties.IsMiddleButtonPressed)293                return;294            // If back or forward are pressed (but not both) navigate appropriately295            bool backPressed = properties.IsXButton1Pressed;296            bool forwardPressed = properties.IsXButton2Pressed;297            if (backPressed ^ forwardPressed)298            {299                e.Handled = true;300                if (backPressed) this.TryGoBack();301                if (forwardPressed) this.TryGoForward();302            }303        }304    }305    /// <summary>306    /// Represents the method that will handle the <see cref="NavigationHelper.LoadState"/>event307    /// </summary>308    public delegate void LoadStateEventHandler(object sender, LoadStateEventArgs e);309    /// <summary>310    /// Represents the method that will handle the <see cref="NavigationHelper.SaveState"/>event311    /// </summary>312    public delegate void SaveStateEventHandler(object sender, SaveStateEventArgs e);313    /// <summary>314    /// Class used to hold the event data required when a page attempts to load state.315    /// </summary>316    public class LoadStateEventArgs : EventArgs317    {318        /// <summary>319        /// The parameter value passed to <see cref="Frame.Navigate(Type, object)"/>320        /// when this page was initially requested.321        /// </summary>322        public object NavigationParameter { get; private set; }323        /// <summary>324        /// A dictionary of state preserved by this page during an earlier325        /// session.  This will be null the first time a page is visited.326        /// </summary>327        public Dictionary<string, object> PageState { get; private set; }328        /// <summary>329        /// Initializes a new instance of the <see cref="LoadStateEventArgs"/> class.330        /// </summary>331        /// <param name="navigationParameter">332        /// The parameter value passed to <see cref="Frame.Navigate(Type, object)"/>333        /// when this page was initially requested.334        /// </param>335        /// <param name="pageState">336        /// A dictionary of state preserved by this page during an earlier337        /// session.  This will be null the first time a page is visited.338        /// </param>339        public LoadStateEventArgs(object navigationParameter, Dictionary<string, object> pageState)340            : base()341        {342            this.NavigationParameter = navigationParameter;343            this.PageState = pageState;344        }345    }346    /// <summary>347    /// Class used to hold the event data required when a page attempts to save state.348    /// </summary>349    public class SaveStateEventArgs : EventArgs350    {351        /// <summary>352        /// An empty dictionary to be populated with serializable state.353        /// </summary>...

SectionPage.xaml.cs

Source:SectionPage.xaml.cs

...94        /// <param name="e">Event data that provides both the navigation parameter passed to95        /// <see cref="Frame.Navigate(Type, Object)"/> when this page was initially requested and96        /// a dictionary of state preserved by this page during an earlier97        /// session.  The state will be null the first time a page is visited.</param>98        private async void navigationHelper_LoadState(object sender, LoadStateEventArgs e)99        {100            var group = await ControlInfoDataSource.GetGroupAsync((String)e.NavigationParameter);101            Group = group;102        }103        /// <summary>104        /// Invoked when an item is clicked.105        /// </summary>106        /// <param name="sender">The GridView displaying the item clicked.</param>107        /// <param name="e">Event data that describes the item clicked.</param>108        void ItemView_ItemClick(object sender, ItemClickEventArgs e)109        {110            // Navigate to the appropriate destination page, configuring the new page111            // by passing required information as a navigation parameter112            var itemId = ((ControlInfoDataItem)e.ClickedItem).UniqueId;...

InterviewPage.xaml.cs

Source:InterviewPage.xaml.cs

...95        /// <param name="e">Event data that provides both the navigation parameter passed to96        /// <see cref="Frame.Navigate(Type, Object)"/> when this page was initially requested and97        /// a dictionary of state preserved by this page during an earlier98        /// session.  The state will be null the first time a page is visited.</param>99        private async void navigationHelper_LoadState(object sender, LoadStateEventArgs e)100        {101            var config = await InterviewerDataSource.GetConfiguration();102            Configuration = config;103            MainViewModel.ViewModel.SelectedConfiguration = config;104            this.DataContext = MainViewModel.ViewModel;105        }        106        private void SearchBox_QuerySubmitted(SearchBox sender, SearchBoxQuerySubmittedEventArgs args)107        {108            //this.Frame.Navigate(typeof(SearchResultsPage), args.QueryText);109        }110        #region NavigationHelper registration111        /// The methods provided in this section are simply used to allow112        /// NavigationHelper to respond to the page's navigation methods.113        /// ...

LoadStateEventArgs

Using AI Code Generation

1using System;2using System.Collections.Generic;3using System.IO;4using System.Linq;5using System.Runtime.InteropServices.WindowsRuntime;6using Windows.ApplicationModel;7using Windows.ApplicationModel.Activation;8using Windows.ApplicationModel.Core;9using Windows.Foundation;10using Windows.Foundation.Collections;11using Windows.UI;12using Windows.UI.Core;13using Windows.UI.ViewManagement;14using Windows.UI.Xaml;15using Windows.UI.Xaml.Controls;16using Windows.UI.Xaml.Controls.Primitives;17using Windows.UI.Xaml.Data;18using Windows.UI.Xaml.Input;19using Windows.UI.Xaml.Media;20using Windows.UI.Xaml.Navigation;21{22    {23        public App()24        {25            this.InitializeComponent();26            this.Suspending += OnSuspending;27        }28        protected override void OnLaunched(LaunchActivatedEventArgs args)29        {30            Frame rootFrame = Window.Current.Content as Frame;31            if (rootFrame == null)32            {33                rootFrame = new Frame();34                SuspensionManager.RegisterFrame(rootFrame, "AppFrame");35                rootFrame.Language = Windows.Globalization.ApplicationLanguages.Languages[0];36                if (args.PreviousExecutionState == ApplicationExecutionState.Terminated)37                {38                    {39                        SuspensionManager.RestoreAsync().GetResults();40                    }41                    catch (SuspensionManagerException)42                    {

LoadStateEventArgs

Using AI Code Generation

1protected override void OnNavigatedTo(NavigationEventArgs e)2{3    base.OnNavigatedTo(e);4    navigationHelper.OnNavigatedTo(e);5}6protected override void OnNavigatedFrom(NavigationEventArgs e)7{8    base.OnNavigatedFrom(e);9    navigationHelper.OnNavigatedFrom(e);10}11private void LoadState(object sender, LoadStateEventArgs e)12{

LoadStateEventArgs

Using AI Code Generation

1        protected override void OnNavigatedTo(NavigationEventArgs e)2        {3            NavigationHelper.LoadStateEventArgs(e);4        }5        protected override void OnNavigatedFrom(NavigationEventArgs e)6        {7            NavigationHelper.SaveStateEventArgs(e);8        }9        protected override void OnNavigatedTo(NavigationEventArgs e)10        {11            NavigationHelper.LoadStateEventArgs(e);12        }13        protected override void OnNavigatedFrom(NavigationEventArgs e)14        {15            NavigationHelper.SaveStateEventArgs(e);16        }17        protected override void OnNavigatedTo(NavigationEventArgs e)18        {19            NavigationHelper.LoadStateEventArgs(e);20        }21        protected override void OnNavigatedFrom(NavigationEventArgs e)22        {23            NavigationHelper.SaveStateEventArgs(e);24        }25        protected override void OnNavigatedTo(NavigationEventArgs e)26        {27            NavigationHelper.LoadStateEventArgs(e);28        }29        protected override void OnNavigatedFrom(NavigationEventArgs e)30        {31            NavigationHelper.SaveStateEventArgs(e);32        }33        protected override void OnNavigatedTo(NavigationEventArgs e)34        {35            NavigationHelper.LoadStateEventArgs(e);36        }37        protected override void OnNavigatedFrom(NavigationEventArgs e)38        {39            NavigationHelper.SaveStateEventArgs(e);40        }41        protected override void OnNavigatedTo(NavigationEventArgs e)42        {43            NavigationHelper.LoadStateEventArgs(e);44        }45        protected override void OnNavigatedFrom(NavigationEventArgs e)46        {47            NavigationHelper.SaveStateEventArgs(e);48        }49        protected override void OnNavigatedTo(NavigationEventArgs e)50        {51            NavigationHelper.LoadStateEventArgs(e);52        }53        protected override void OnNavigatedFrom(NavigationEventArgs e)54        {55            NavigationHelper.SaveStateEventArgs(e);

LoadStateEventArgs

Using AI Code Generation

1{2    public Page1()3    {4        this.InitializeComponent();5    }6    protected override void OnNavigatedTo(NavigationEventArgs e)7    {8        base.OnNavigatedTo(e);9        var navigationHelper = new NavigationHelper(this);10        navigationHelper.LoadState += navigationHelper_LoadState;11    }12    void navigationHelper_LoadState(object sender, LoadStateEventArgs e)13    {

LoadStateEventArgs

Using AI Code Generation

1protected override void OnNavigatedTo(NavigationEventArgs e)2{3    navigationHelper.OnNavigatedTo(e);4    var state = navigationHelper.LoadStateEventArgs;5    if (state != null)6    {7    }8}9protected override void OnNavigatedTo(NavigationEventArgs e)10{11    navigationHelper.OnNavigatedTo(e);12    var state = navigationHelper.LoadStateEventArgs;13    if (state != null)14    {15    }16}17protected override void OnNavigatedTo(NavigationEventArgs e)18{19    navigationHelper.OnNavigatedTo(e);20    var state = navigationHelper.LoadStateEventArgs;21    if (state != null)22    {23    }24}25protected override void OnNavigatedTo(NavigationEventArgs e)26{27    navigationHelper.OnNavigatedTo(e);28    var state = navigationHelper.LoadStateEventArgs;29    if (state != null)30    {31    }32}33protected override void OnNavigatedTo(NavigationEventArgs e)34{35    navigationHelper.OnNavigatedTo(e);36    var state = navigationHelper.LoadStateEventArgs;37    if (state != null)38    {39    }40}41protected override void OnNavigatedTo(NavigationEventArgs e)42{43    navigationHelper.OnNavigatedTo(e);44    var state = navigationHelper.LoadStateEventArgs;45    if (state != null)46    {47    }48}49protected override void OnNavigatedTo(NavigationEventArgs e)50{51    navigationHelper.OnNavigatedTo(e);52    var state = navigationHelper.LoadStateEventArgs;

LoadStateEventArgs

Using AI Code Generation

1protected override void OnNavigatedTo(NavigationEventArgs e)2{3    base.OnNavigatedTo(e);4    navigationHelper.OnNavigatedTo(e);5}6protected override void OnNavigatedFrom(NavigationEventArgs e)7{8    navigationHelper.OnNavigatedFrom(e);9    base.OnNavigatedFrom(e);10}11private void LoadState(object sender, LoadStateEventArgs e)12{

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