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Book Overview & Buying
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Table Of Contents
Modernizing Your Windows Applications with the Windows App SDK and WinUI
By :
In Chapter 3, The Windows App SDK for a WPF Developer, you already met the Dispatcher class. It's a special class provided by the XAML framework that you can use to dispatch a task on the UI thread. Since every WinUI application has a single UI thread, Dispatcher becomes especially important when you are executing some code on a background thread but then, at some point, you have to interact with a UI control. Without using the Dispatcher class, the operation would raise an exception, since you can't update the UI from a different thread than the UI one.
UWP exposes a Dispatcher class on every page, which belongs to the Windows.UI.Core.CoreDispatcher namespace. Here is an example of how to use it:
await Dispatcher.RunAsync(Windows.UI.Core.
CoreDispatcherPriority.Normal, () =>
{
txtHeader.Text = "This is a header";
});
Actions on the UI thread are dispatched using the RunAsync() method, which...