windows-store-apps - w3toppers.com

Adding headers when using httpClient.GetAsync

A later answer, but because no one gave this solution… If you do not want to set the header on the HttpClient instance by adding it to the DefaultRequestHeaders, you could set headers per request. But you will be obliged to use the SendAsync() method. This is the right solution if you want to reuse … Read more

How does Windows 8 Runtime (WinRT / Windows Store apps / Windows 10 Universal App) compare to Silverlight and WPF? [closed]

At the lowest level, WinRT is an object model defined on ABI level. It uses COM as a base (so every WinRT object implements IUnknown and does refcounting), and builds from there. It does add quite a lot of new concepts in comparison to COM of old, most of which come directly from .NET – … Read more

how to use MVVMLight SimpleIoc? [closed]

SimpleIoc crib sheet: 1) You register all your interfaces and objects in the ViewModelLocator class ViewModelLocator { static ViewModelLocator() { ServiceLocator.SetLocatorProvider(() => SimpleIoc.Default); if (ViewModelBase.IsInDesignModeStatic) { SimpleIoc.Default.Register<IDataService, Design.DesignDataService>(); } else { SimpleIoc.Default.Register<IDataService, DataService>(); } SimpleIoc.Default.Register<MainViewModel>(); SimpleIoc.Default.Register<SecondViewModel>(); } public MainViewModel Main { get { return ServiceLocator.Current.GetInstance<MainViewModel>(); } } } 2) Every object is a singleton by … Read more

Synchronously waiting for an async operation, and why does Wait() freeze the program here

The await inside your asynchronous method is trying to come back to the UI thread. Since the UI thread is busy waiting for the entire task to complete, you have a deadlock. Moving the async call to Task.Run() solves the issue. Because the async call is now running on a thread pool thread, it doesn’t … Read more

How do I access a control inside a XAML DataTemplate?

The problem you are experiencing is that the DataTemplate is repeating and the content is being generated by the FlipView. The Name is not exposed because it would conflict with the previous sibling that was generated (or the next one that will be). So, to get a named element in the DataTemplate you have to … Read more

Is it possible to await an event instead of another async method?

You can use an instance of the SemaphoreSlim Class as a signal: private SemaphoreSlim signal = new SemaphoreSlim(0, 1); // set signal in event signal.Release(); // wait for signal somewhere else await signal.WaitAsync(); Alternatively, you can use an instance of the TaskCompletionSource<T> Class to create a Task<T> that represents the result of the button click: … Read more