What is the use of BackgroundWorker in VB net?

What is the use of BackgroundWorker in VB net?

Summary. BackgroundWorker is useful for creating a background process, one which won’t block the user interface if it takes a long time to run. Often, disk or network accesses are the slowest and should be put on a background thread if possible.

What is a BackgroundWorker?

The BackgroundWorker class allows you to run an operation on a separate, dedicated thread. Time-consuming operations like downloads and database transactions can cause your user interface (UI) to seem as though it has stopped responding while they are running.

Is BackgroundWorker obsolete?

BackgroundWorker is explicitly labeled as obsolete in . NET 4.5: in the book By Joseph Albahari, Ben Albahari “C# 5.0 in a Nutshell: The Definitive Reference”

What is WPF BackgroundWorker?

The BackgroundWorker class is used to run time-consuming tasks in the background; it leaves the user interface responsive. BackgroundWorker.rar. Sometimes we need to perform some time consuming tasks such as downloads etc. Execution of these tasks consumes a large amount of time.

How do I use BackgroundWorker?

The steps are extremely simple:

1. Create a BackgroundWorker object.
2. Tell the BackgroundWorker object what task to run on the background thread (the DoWork function).
3. Tell it what function to run on the UI thread when the work is complete (the RunWorkerCompleted function).

Is BackgroundWorker threaded?

BackgroundWorker, is a component in . NET Framework, that allows executing code as a separate thread and then report progress and completion back to the UI.

What is BackgroundWorker in Winforms?

The BackgroundWorker class exposes the DoWork event, to which your worker thread is attached through a DoWork event handler. The DoWork event handler takes a DoWorkEventArgs parameter, which has an Argument property.

Does Task run create a new thread?

Inside DoComplexCalculusAsync(), Task. Run uses another new thread from thread pool to do the heavy calculations in the background. Thus the thread pool has to deal with unexpectedly loosing one thread from the pool. When the thread completes the computations it is returned back to the thread pool thread.

How do I get rid of BackgroundWorker?

BackgroundWorker has its own, unique way of doing cancellation. First, when constructing the BGW instance, be sure to set BackgroundWorker. WorkerSupportsCancellation to true . Then, the calling code can request the worker to cancel by calling BackgroundWorker.

What is the difference between BackgroundWorker and thread?

BackgroundWorker has already implemented functionality of reporting progress, completion and cancellation – so you don’t need to implement it by yourself. Usage of Thread gives you more control over the async process execution (e.g. thread priority or choosing beetween foreground/background thread type).

What is the difference between threads and tasks?

A thread is one of the many possible workers which performs that task. In . NET 4.0 terms, a Task represents an asynchronous operation. Thread(s) are used to complete that operation by breaking the work up into chunks and assigning to separate threads.

Should I use await Task run?

If you use Task. Run with an I/O operation, you’re creating a thread (and probably occupying a CPU core) that will mostly be waiting. It may be a quick and easy way to keep your application responsive, but it’s not the most efficient use of system resources. A much better approach is to use await without Task.