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

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

NavigationHelper.cs

Source:NavigationHelper.cs Github

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...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>...

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LoadStateEventArgs

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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.Foundation;9using Windows.Foundation.Collections;10using Windows.UI.Xaml;11using Windows.UI.Xaml.Controls;12using Windows.UI.Xaml.Controls.Primitive;13using Windows.UI.Xaml.Data;14using Windows.UI.Xaml.Input;15using Windows.UI.Xaml.Media;16using Windows.UI.Xaml.Navigation;17{18 {19 public App()20 {21 this.InitializeComponent();22 this.Suspending += OnSuspending;23 }24 protected override void OnLaunched(LaunchActivatedEventArgs args)25 {26 Frame rootFrame = Window.Current.Content as Frame;27 if (rootFrame == null)28 {29 rootFrame = new Frame();30 rootFrame.NavigationFailed += OnNavigationFailed;31 if (args.PreviousExecutionState == ApplicationExecutionState.Terminated)32 {

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LoadStateEventArgs

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1using System;2using System.Collections.Generic;3using System.IO;4using System.Linq;5using Windows.ApplicationModel;6using Windows.Foundation;7using Windows.Foundation.Collections;8using Windows.UI.Xaml;9using Windows.UI.Xaml.Controls;10using Windows.UI.Xaml.Controls.Primitive;11using Windows.UI.Xaml.Data;12using Windows.UI.Xaml.Input;13using Windows.UI.Xaml.Media;14using Windows.UI.Xaml.Navigation;15using AppUIBasics.Common;16using Windows.UI.Xaml.Media.Imaging;17using Windows.Storage;18{19 {20 public Page4()21 {22 this.InitializeComponent();23 }24 protected override void LoadState(Object navigationParameter, Dictionary<String, Object> pageState)25 {

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LoadStateEventArgs

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1{2 {3 public LoadStateEventArgs(object navigationParameter, Dictionary<string, object> pageState)4 {5 this.NavigationParameter = navigationParameter;6 this.PageState = pageState;7 }8 public object NavigationParameter { get; private set; }9 public Dictionary<string, object> PageState { get; private set; }10 }11}12{13 {14 public SaveStateEventArgs(Dictionary<string, object> pageState)15 {16 this.PageState = pageState;17 }18 public Dictionary<string, object> PageState { get; private set; }19 }20}21{22 {23 DependencyProperty.RegisterAttached("LoadState", typeof(LoadStateEventHandler), typeof(NavigationHelper), new PropertyMetadata(null, OnLoadStatePropertyChanged));24 DependencyProperty.RegisterAttached("SaveState", typeof(SaveStateEventHandler), typeof(NavigationHelper), new PropertyMetadata(null, OnSaveStatePropertyChanged));25 public static LoadStateEventHandler GetLoadState(DependencyObject obj)26 {27 return (LoadStateEventHandler)obj.GetValue(LoadStateProperty);28 }29 public static void SetLoadState(DependencyObject obj, LoadStateEventHandler value)30 {31 obj.SetValue(LoadStateProperty, value);32 }33 public static SaveStateEventHandler GetSaveState(DependencyObject obj)34 {35 return (SaveStateEventHandler)obj.GetValue(SaveStateProperty);36 }37 public static void SetSaveState(DependencyObject obj, SaveStateEventHandler value)38 {39 obj.SetValue(SaveStateProperty, value);40 }41 private static void OnLoadStatePropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)42 {43 var frame = d as Frame;44 if (frame == null)45 {46 throw new InvalidOperationException("The LoadState attached property can only be set on Frames");47 }48 if (e.NewValue != null && e.OldValue == null)49 {

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LoadStateEventArgs

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1using System;2using Windows.UI.Xaml;3using Windows.UI.Xaml.Controls;4using Windows.UI.Xaml.Navigation;5using AppUIBasics.Common;6{7 {8 public Scenario4()9 {10 InitializeComponent();11 }12 private void OnPageLoaded(object sender, RoutedEventArgs e)13 {

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LoadStateEventArgs

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1{2 public App()3 {4 InitializeComponent();5 Suspending += OnSuspending;6 }7 protected override void OnLaunched(LaunchActivatedEventArgs e)8 {9 Frame rootFrame = Window.Current.Content as Frame;10 if (rootFrame == null)11 {12 rootFrame = new Frame();13 rootFrame.NavigationFailed += OnNavigationFailed;14 if (e.PreviousExecutionState == ApplicationExecutionState.Terminated)15 {16 {

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LoadStateEventArgs

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1using AppUIBasics.Common;2using Windows.UI.Xaml.Controls;3using Windows.UI.Xaml.Navigation;4{5 {6 public Scenario4()7 {8 this.InitializeComponent();9 }10 protected override void OnNavigatedTo(NavigationEventArgs e)11 {12 LoadStateEventArgs loadState = e.Parameter as LoadStateEventArgs;13 if (loadState != null)14 {15 txtBox.Text = loadState.NavigationState.ToString();16 }17 }18 }19}20using AppUIBasics.Common;21using Windows.UI.Xaml.Controls;22using Windows.UI.Xaml.Navigation;23{24 {25 public Scenario4()26 {27 this.InitializeComponent();28 }29 protected override void OnNavigatingFrom(NavigatingCancelEventArgs e)30 {31 SaveStateEventArgs saveState = new SaveStateEventArgs();32 saveState.NavigationState = txtBox.Text;33 e.Parameter = saveState;34 }35 }36}

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LoadStateEventArgs

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

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LoadStateEventArgs

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1protected override void OnNavigatedTo(NavigationEventArgs e)2{3 if (e.Parameter != null)4 {5 LoadStateEventArgs loadStateEventArgs = (LoadStateEventArgs)e.Parameter;6 this._selectedItem = loadStateEventArgs.SelectedItem;7 this._selectedItemIndex = loadStateEventArgs.SelectedIndex;8 }9}10protected override void OnNavigatedTo(NavigationEventArgs e)11{12 if (e.Parameter != null)13 {14 LoadStateEventArgs loadStateEventArgs = (LoadStateEventArgs)e.Parameter;15 this._selectedItem = loadStateEventArgs.SelectedItem;16 this._selectedItemIndex = loadStateEventArgs.SelectedIndex;17 }18}19protected override void OnNavigatedTo(NavigationEventArgs e)20{21 if (e.Parameter != null)22 {23 LoadStateEventArgs loadStateEventArgs = (LoadStateEventArgs)e.Parameter;24 this._selectedItem = loadStateEventArgs.SelectedItem;25 this._selectedItemIndex = loadStateEventArgs.SelectedIndex;26 }27}28protected override void OnNavigatedTo(NavigationEventArgs e)29{30 if (e.Parameter != null)31 {32 LoadStateEventArgs loadStateEventArgs = (LoadStateEventArgs)e.Parameter;33 this._selectedItem = loadStateEventArgs.SelectedItem;34 this._selectedItemIndex = loadStateEventArgs.SelectedIndex;35 }36}37protected override void OnNavigatedTo(NavigationEventArgs e)38{39 if (e.Parameter != null)40 {

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LoadStateEventArgs

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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.Foundation;9using Windows.Foundation.Collections;10using Windows.UI.Xaml;11using Windows.UI.Xaml.Controls;12using Windows.UI.Xaml.Controls.Primitive;13using Windows.UI.Xaml.Data;14using Windows.UI.Xaml.Input;15using Windows.UI.Xaml.Media;16using Windows.UI.Xaml.Navigation;17{18 {19 public App()20 {21 this.InitializeComponent();22 this.Suspending += this.OnSuspending;23 }24 protected override void OnLaunched(LaunchActivatedEventArgs args)25 {26 Frame rootFrame = Window.Current.Content as Frame;27 if (rootFrame == null)28 {29 rootFrame = new Frame();

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