Download Windows Phone 8 Development Internals by Andrew Whitechapel PDF
By Andrew Whitechapel
Drill into home windows telephone eight layout and structure - and study top practices for construction quite a few purposes. Led through senior participants of the center home windows cellphone Developer Platform crew, you are going to study the underlying expertise to help you construct larger apps. each one bankruptcy makes a speciality of a unmarried home windows mobile construction block or characteristic zone and indicates you the way to use it on your purposes - delivering you helpful insights into the home windows mobilephone platform layout and API floor.
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Extra resources for Windows Phone 8 Development Internals
Relative URLs are used for navigation to another page within the app. Absolute URLs can be used with HyperlinkButton controls to navigate to external web pages via the web browser (Internet Explorer). Backward navigation should typically be done via the hardware Back button on the device. If the user navigates back from the initial page, this must terminate the app, as depicted in Figure 2-6. Start Exit Launch Back 3 Main Page Nav 1 Back 2 Page 2 Nav 2 Back 1 Page 3 Figure 2-6 An overview of intra-app page navigation.
Transient application state The state that applies across the app that does not need to persist between runs of the app; for example cached web service data. State property when the app handles the Deactivated event, and retrieve it in the Activated event. Persistent state The state of any kind that needs to persist across runs of the app—essentially, anything that would upset the user if you didn’t save it. Store this to persistent storage incrementally during the lifetime of the app. Your last chance to do this is during the Deactivated and Closing events (the app might not return from Deactivated, and will not return from Closing), but you should not leave all persistence to these events.
This is explored in detail in Chapter 4. For now, you can ignore it. ” to the end of the URI, and then appending “key/value” pairs. Relative)); } } If you use a query string, in the receiving page, this is provided as an IDictionary property on the NavigationContext, which itself is a property of the Page object. You can use both a query string and a fragment in the same URL, but this is not likely to be useful: it would require you to handle both, and to parse the URL in both cases to extract either one.