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Are there any standard tools, or recommended approaches for async tasks execution?
UPD I understand, how to use threads. I only need to know the recommended WPF way to block UI while performing async call, and how to update progress info.
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GetAwaiter. GetResult pattern to actually convert async to sync. But if you do that byitself in WPF or another SynchronizationContext bound to a particular thread you deadlock. This code avoids deadlock by transferring the async operation to the threadpool which is not synchronized to a particular thread.
An asynchronous task is defined by a computation that runs on a background thread and whose result is published on the UI thread. An asynchronous task is defined by 3 generic types, called Params , Progress and Result , and 4 steps, called onPreExecute , doInBackground , onProgressUpdate and onPostExecute .
Async void methods can wreak havoc if the caller isn't expecting them to be async. When the return type is Task, the caller knows it's dealing with a future operation; when the return type is void, the caller might assume the method is complete by the time it returns.
An AsyncTask streamlines the following common background process: Pre - Execute code on the UI thread before starting a task (e.g show ProgressBar) Task - Run a background task on a thread given certain inputs (e.g fetch data) Updates - Display progress updates during the task (optional)
You can use several ways, for example:
And since .NET 4, the preferred way is to use Tasks.
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