You need to recommend which code must be implemented to meet the requirements for resuming the video tour downloads.
Develop the solution by selecting and ordering the required code snippets. You may not need all of the code snippets.
Select and Place:
Correct Answer:
Explanation/Reference:
Note:
* GetCurrentDownloadsAsync
Returns a collection of pending downloads that are not associated with a group.
* await Task.WhenAny
By using Task.WhenAny, you can start multiple tasks at the same time and process them one by one as they’re completed rather than process them in the order in which they’re started.
* From scenario:
/When a customer clicks the details of a listing, the app must start downloading the video tour in the background.
/ When the app starts, the app must verify whether there are any pending downloads, and resume any paused downloads.
/ When downloading the video tours, the app must remain responsive, and each download must be processed on a separate thread.
Incorrect:
* Not: await Task.WhenAll (need separate threads)
You apply the Task.WhenAll method to a collection of tasks. The application of WhenAll returns a single task that isn’t complete until every task in the collection is completed. The tasks appear to run in parallel, but no additional threads are created. The tasks can complete in any order.
* Not: RequestUnconstrainedDownloadsAsync
Used to request an unconstrained download operation. When this method is called the user is provided with a UI prompt that they can use to indicate their consent for an unconstrained operation.
An unconstrained transfer operation will run without the resource restrictions normally associated with background network operations while a device is running on battery.
