Note: The code below is just a test I'm performing so I can take the structure and expand it to a real-world, time-consuming, stored-proc. Of course, I'd like the progressbar to update during the counting. Interestingly, the two counts do occur at the same time (which is the intent.win!) but the progressbar doesn't change at all until after the BackgroundWorker has finished. One runs directly from the form (in the main thread) and another is performed by a BackgroundWorker.
Add Images into Toolbar Buttons in VB.NET.ListView Control with Multiple Column in VB.NET.
ComboBox with AutoComplete TextBox in VB.NET.The following code is added when you drag a BackgroundWorker component onto a Form.įriend WithEvents BackgroundWorker1 As System.ComponentModel. We can create the BackgroundWorker at design-time by dragging onto a Form or at run-time using the BackgroundWorker class. In this article, I will demonstrate how to use the BackgroundWorker component to execute a time consuming process while main thread is still available to the user interface. We can execute this process in a separate thread also known as a worker or secondary thread.Ī BackgroundWorker component executes code in a separate dedicated secondary thread. If we have an application that has some code that is very time consuming such as large text file parsing and takes several minutes or longer, you may not want your users to wait till the process is finished. A primary thread is the default, main thread of applications and executes the code by default. If you have ever written multi-threaded applications, you must be familiar with primary and secondary threads.
If you look at the Component tab Toolbox of Visual Studio 2010, you will notice the BackgroundWorker component is the first in the list.
0 kommentar(er)
