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BackgroundWorker and ProgressBar demo

, 23 May 2010 CPOL
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A simple demonstration of how to use a BackgroundWorker with a ProgressBar
This gets asked almost daily so I've written this short demonstration code to demonstrate how to use a System.ComponentModel.BackgroundWorker in combination with a System.Windows.Forms.ProgressBar. All the code is commented so the flow/steps should be easy to understand.
 
Just drop a ProgressBar (progressBar1) and a BackgroundWorker (backgroundWorker1) onto your form and copy and paste this code to see it in action.
public partial class Form1 : Form
{
    public Form1()
    {
        InitializeComponent();
        Shown += new EventHandler(Form1_Shown);
 
        // To report progress from the background worker we need to set this property
        backgroundWorker1.WorkerReportsProgress = true;
        // This event will be raised on the worker thread when the worker starts
        backgroundWorker1.DoWork += new DoWorkEventHandler(backgroundWorker1_DoWork);
        // This event will be raised when we call ReportProgress
        backgroundWorker1.ProgressChanged += new ProgressChangedEventHandler(backgroundWorker1_ProgressChanged);
    }
    void Form1_Shown(object sender, EventArgs e)
    {
        // Start the background worker
        backgroundWorker1.RunWorkerAsync();
    }
    // On worker thread so do our thing!
    void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e)
    {
        // Your background task goes here
        for (int i = 0; i <= 100; i++)
        {
            // Report progress to 'UI' thread
            backgroundWorker1.ReportProgress(i);
            // Simulate long task
            System.Threading.Thread.Sleep(100);
        }
    }
    // Back on the 'UI' thread so we can update the progress bar
    void backgroundWorker1_ProgressChanged(object sender, ProgressChangedEventArgs e)
    {
        // The progress percentage is a property of e
        progressBar1.Value = e.ProgressPercentage;
    }
}

License

This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

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DaveyM69
CEO Dave Meadowcroft
United Kingdom United Kingdom
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Comments and Discussions

 
QuestionGetting exception System.InvalidOperationException PinprofessionalGovind K24-Aug-14 21:20 
AnswerRe: Getting exception System.InvalidOperationException PinmentorDaveyM6914-Oct-14 3:38 
QuestionIs there any reason...? PinmemberJames McCullough10-Nov-13 15:48 
AnswerRe: Is there any reason...? PinmentorDaveyM6911-Nov-13 1:44 
GeneralRe: Is there any reason...? PinmemberJames McCullough11-Nov-13 8:41 
QuestionBackgroundWorker and ProgressBar Pinmemberrainer_martin25-Jul-13 18:17 
GeneralMy vote of 5 Pinmemberrainer_martin25-Jul-13 18:16 
QuestionVB.Net Code for BackgroundWorker and ProgressBar Demo PinmemberMember 886365516-May-13 10:34 
AnswerRe: VB.Net Code for BackgroundWorker and ProgressBar Demo PinmentorDaveyM6920-May-13 2:45 
GeneralRe: VB.Net Code for BackgroundWorker and ProgressBar Demo PinmemberMember 886365520-May-13 17:59 
GeneralMy vote of 5 PinmemberaGISer24-Apr-13 22:00 
QuestionI am new to Background Worker and Progress Bar Here Pinmemberprashantn.pol1-Jan-13 23:00 
GeneralMy vote of 5 Pinmembertausif_91-Aug-12 3:57 
GeneralMy vote of 4 Pinmembersirama200430-Jul-12 23:01 
GeneralMy vote of 4 Pinmemberprasad kolekar6015-Jun-12 1:26 
GeneralReason for my vote of 5 Simple and to the point. PinmemberProEnggSoft24-Feb-12 4:18 
GeneralReason for my vote of 5 Simple, straightforward, well commen... Pinmember5cw12-Feb-12 11:51 
GeneralThanks a whole lot, I'm a newbe, and after searching thru 30... PinmemberInflicter15-Sep-11 8:48 
GeneralReason for my vote of 5 Simple to the point In Title PinmemberAirelement07414-Jun-11 7:17 
GeneralReason for my vote of 4 practical Pinmemberphiyano2-Aug-10 17:13 

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