Tutorial by Examples: backgroundworker

Once the instance of the BackgroundWorker has been declared, it must be given properties and event handlers for the tasks it performs. /* This is the backgroundworker's "DoWork" event handler. This method is what will contain all the work you wish to have your progra...

This allows the BackgroundWorker to be cancelled in between tasks bgWorker.WorkerSupportsCancellation = true; This allows the worker to report progress between completion of tasks... bgWorker.WorkerReportsProgress = true; //this must also be used in conjunction with the ProgressChanged event...

A BackgroundWorker is commonly used to perform tasks, sometimes time consuming, without blocking the UI thread. // BackgroundWorker is part of the ComponentModel namespace. using System.ComponentModel; namespace BGWorkerExample { public partial class ExampleForm : Form { ...

The following example demonstrates the use of a BackgroundWorker to update a WinForms ProgressBar. The backgroundWorker will update the value of the progress bar without blocking the UI thread, thus showing a reactive UI while work is done in the background. namespace BgWorkerExample { public...

See below for a simple example of how to use a BackgroundWorker object to perform time-intensive operations in a background thread. You need to: Define a worker method that does the time-intensive work and call it from an event handler for the DoWork event of a BackgroundWorker. Start the execu...

Executing a task with the background worker. Double Click on the BackgroundWorker control from the Toolbox This is how the BackgroundWorker appears after adding it. Double click on the added control to get the BackgroundWorker1_DoWork event and add the code to be executed when the BackgroundW...

You cannot access any GUI components from the BackgroudWorker. For example if you try to do something like this Private Sub BackgroundWorker1_DoWork(sender As Object, e As DoWorkEventArgs) TextBox1.Text = "Done" End Sub you will receive a runtime error saying that "Cross-thr...

You need to import System.ComponentModel for using background worker Imports System.ComponentModel Then Declare a private variable Private bgWorker As New BackgroundWorker You need to create two methods for background worker's DoWork and RunWorkerCompleted events and assign them. Private Su...