Topics. Windows Phone

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Joanna Collins
5 years ago
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1 Session 4.5

2 Topics

3 The Story So Far 3

4 Multi-page applications 4

5 Adding another page 5

6 Pages and projects 6

7 Page Navigation private void page2button_click(object sender, RoutedEventArgs e) { NavigationService.Navigate( new Uri("/CustomerDetailPage.xaml", UriKind.RelativeOrAbsolute)); } 7

8 The UriKind private void page2button_click(object sender, RoutedEventArgs e) { NavigationService.Navigate( new Uri("/CustomerDetailPage.xaml", UriKind.RelativeOrAbsolute)); } 8

9 Missing page exceptions 9

10 Using the Back button 10

11 Overriding the Back button 11

12 Disabling the Back Button private void PhoneApplicationPage_BackKeyPress( object sender, System.ComponentModel.CancelEventArgs e) { e.cancel = true; } 12

13 Using a MessageBox private void PhoneApplicationPage_BackKeyPress( object sender, System.ComponentModel.CancelEventArgs e) { if (MessageBox.Show("Do you really want to exit?", "Page Exit", MessageBoxButton.OKCancel)!= MessageBoxResult.OK) { e.cancel = true; } } 13

14 Passing data between pages 14

15 Assembling a data uri // Get the selected customer from the list Customer selectedcustomer = customerlist.selecteditem as Customer; // Build a navigation string containing the information NavigationService.Navigate( new Uri("/CustomerDetailPage.xaml?" + "name=" + selectedcustomer.name + "&" + "address=" + selectedcustomer.address, UriKind.Relative)); 15

16 Page navigated events 16

17 Loading data from the uri protected override void OnNavigatedTo (System.Windows.Navigation.NavigationEventArgs e) { string name, address; if (NavigationContext.QueryString.TryGetValue("name", out name)) nametextblock.text = name; } 17

18 Demo 2: Passing Data 18

19 Sharing objects between pages 19

20 The App.xaml page 20

21 The App class public partial class App : Application { // To be used from all pages in the application public Customer ActiveCustomer; } 21

22 Getting a reference to the App protected override void OnNavigatedTo( System.Windows.Navigation.NavigationEventArgs e) { base.onnavigatedto(e); // Get the parent App containing the active customer App thisapp = Application.Current as App; // Set the data context for the Grid to the selected // customer customerdisplaygrid.datacontext = thisapp.activecustomer; } 22

23 Getting a reference to the App protected override void OnNavigatedTo( System.Windows.Navigation.NavigationEventArgs e) { base.onnavigatedto(e); // Get the parent App containing the active customer App thisapp = Application.Current as App; // Set the data context for the Grid to the selected // customer customerdisplaygrid.datacontext = thisapp.activecustomer; } 23

24 Getting a reference to the App protected override void OnNavigatedTo( System.Windows.Navigation.NavigationEventArgs e) { base.onnavigatedto(e); // Get the parent App containing the active customer App thisapp = Application.Current as App; // Set the data context for the Grid to the selected // customer customerdisplaygrid.datacontext = thisapp.activecustomer; } 24

25 Getting a reference to the App protected override void OnNavigatedTo( System.Windows.Navigation.NavigationEventArgs e) { base.onnavigatedto(e); // Get the parent App containing the active customer App thisapp = Application.Current as App; // Set the data context for the Grid to the selected // customer customerdisplaygrid.datacontext = thisapp.activecustomer; } 25

26 Setting the Edit Data Context protected override void OnNavigatedTo( System.Windows.Navigation.NavigationEventArgs e) { base.onnavigatedto(e); // Get the parent App containing the active customer App thisapp = Application.Current as App; // Set the data context for the Grid to the selected // customer customerdisplaygrid.datacontext = thisapp.activecustomer; } 26

27 Demo 3: Shared Data 27

28 Review 28

Microsoft Corporation

Microsoft Corporation http://www.jeff.wilcox.name/ 2 3 Display 480x800 QVGA Other resolutions in the future Capacitive touch 4+ contact points Sensors A-GPS, Accelerometer, Compass, Light Camera 5+ megapixels