How to Perform Background Tasks in WPF with Progress Reporting and Cancellation?

Background Execution in WPF

In WPF applications, tasks that may block the UI thread should be executed in the background. When selecting an appropriate approach, consider factors such as thread blocking, progress reporting, cancellation, and multithreading support.

Task-Based API and Async/Await

With .NET 4.5 or later (or .NET 4.0 with Microsoft.Bcl.Async), the Task-based API using async/await offers the optimal solution for background execution. It enables a convenient and structured coding experience.

Example

The following code demonstrates an example of using async/await to execute a task in the background:

private async void Start(object sender, RoutedEventArgs e)
{
    try
    {
        await Task.Run(() =>
        {
            int progress = 0;
            for (; ; )
            {
                Thread.Sleep(1);
                progress++;
                Logger.Info(progress);
            }
        });
    }
    catch (Exception ex)
    {
        MessageBox.Show(ex.Message);
    }
}

This code creates a task that runs in the background, allowing progress reporting through the progress variable and cancellation through the CancellationTokenSource (not shown).

Additional Resources

For further information and in-depth understanding:

• [How to execute task in the WPF background while able to provide report and allow cancellation?](https://stackoverflow.com/questions/498416/how-to-execute-task-in-the-wpf-background-while-able-to-provide-report-and-al)
• Async in 4.5: Enabling Progress and Cancellation in Async APIs (blog post)
• [Async and Await](https://docs.microsoft.com/en-us/dotnet/csharp/programming-guide/concepts/async/)
• [Async/Await FAQ](https://docs.microsoft.com/en-us/dotnet/csharp/programming-guide/concepts/async/async-faq)

The above is the detailed content of How to Perform Background Tasks in WPF with Progress Reporting and Cancellation?. For more information, please follow other related articles on the PHP Chinese website!