Async/Await vs. BackgroundWorker: When Should I Use Which for Asynchronous Operations?

.NET asynchronous operation: comparison and application scenario of Async/Await and BackgroundWorker

.NET 4.5 and C# 5 introduced Async/Await features, which brought new options for asynchronous programming, and also triggered a comparison with the old background task management tool BackgroundWorker. Both are used to handle asynchronous operations, but their role and application scenarios are very different.

Async/Await: Waiting asynchronous

Async/Await is a language grammar that simplifies asynchronous programming. It allows developers to write asynchronous code executing concurrently without blocking UI threads to ensure the response of UI. Async/Await is usually based on task asynchronous mode (TAP), which contains asynchronous operations and its continuation mechanism.

BackgroundWorker: Backstage task management

BackgroundWorker is used to manage long -term operation tasks in the background threads, which is independent of the UI thread. It provides a simple mechanism that uninstalls the heavy operation to the background without affecting the response speed of UI. BackgroundWorker has a built -in progress report and cancellation function, simplifying the realization of asynchronous tasks. When to use async/await

Async/Await is especially suitable for the following scenes:

I/O operations need to be performed asynchronously, such as obtaining data from network services or reading files.

Use asynchronous commission or incident to allow asynchronous to continue existing operations.

Need to concurrently wait for multiple asynchronous operations to complete, while maintaining UI response.
• When to use BackgroundWorker
BackgroundWorker is most suitable for the following situations:

The calculation dense process that needs to be run in the background.

You need to report the progress or cancel the operation from the UI thread.

You need to uninstall a large number of work to a separate thread to avoid the UI freeze.

BackgroundWorker and Async/Await compare
• Although both on the surface are processed asynchronous tasks, BackgroundWorker and Async/Await are completely different concepts:

Async/Await mainly focuses on asynchronous programming and uses TAP to perform operations; BackgroundWorker focuses on managing background tasks to provide schedule reports and cancellation functions. Async/Await is suitable for interaction with I/O operations and other asynchronous structures, while BackgroundWorker is designed to designed for long operation tasks that may not involve asynchronous operations.

Async/Await and C#language syntax are seamless, providing simple and elegant asynchronous code writing methods; BackgroundWorker uses event -based programming, which may lead to lengthy code.

• In the end, choosing Async/Await or BackgroundWorker depends on the specific needs of the asynchronous task that need to be processed in the application. Async/Await enables developers to write high response and concurrent code, while BackgroundWorker provides a more direct method to manage background operations with progress reports and cancellation functions.

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