Show a ProgressBar While Processing on a Background Thread : BackgroundWorker « Windows Presentation Foundation « C# / CSharp Tutorial





<Window x:Class="WpfApplication1.Window1"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="WPF" Height="100" Width="200">
    <StackPanel>
        <ProgressBar Name="progressBar" Margin="4"/>
        <Button Name="button" Click="button_Click">Start</Button>
    </StackPanel>
</Window>

//File:Window.xaml.cs
using System.ComponentModel;
using System.Threading;
using System.Windows;
using System.Windows.Input;

namespace WpfApplication1
{
    public partial class Window1 : Window
    {
        private BackgroundWorker worker = new BackgroundWorker();

        public Window1()
        {
            InitializeComponent();
            worker.WorkerReportsProgress = true;
            worker.DoWork += new DoWorkEventHandler(worker_DoWork);
            worker.RunWorkerCompleted += new RunWorkerCompletedEventHandler(worker_RunWorkerCompleted);
            worker.ProgressChanged += worker_ProgressChanged;
        }

        private void button_Click(object sender, RoutedEventArgs e)
        {
            worker.RunWorkerAsync();
            this.Cursor = Cursors.Wait;
            button.IsEnabled = false;
        }

        private void worker_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
        {
            this.Cursor = Cursors.Arrow;
            if(e.Error != null)
                MessageBox.Show(e.Error.Message);
            button.IsEnabled = true;
        }
        private void worker_DoWork(object sender, DoWorkEventArgs e)
        {
            for(int i = 1; i <= 100; i++)
            {
                Thread.Sleep(100);
                worker.ReportProgress(i);
            }
        }

        private void worker_ProgressChanged(object sender, ProgressChangedEventArgs e)
        {
            progressBar.Value = e.ProgressPercentage;
        }
    }
}
WPF Show A Progress Bar While Processing On A Background Thread










24.152.BackgroundWorker
24.152.1.Execute a Method Asynchronously Using a Background Worker ThreadExecute a Method Asynchronously Using a Background Worker Thread
24.152.2.Track the Progress of a Background Worker ThreadTrack the Progress of a Background Worker Thread
24.152.3.Support the Cancellation of a Background Worker ThreadSupport the Cancellation of a Background Worker Thread
24.152.4.Create a Background Worker Thread in XAMLCreate a Background Worker Thread in XAML
24.152.5.Show a ProgressBar While Processing on a Background ThreadShow a ProgressBar While Processing on a Background Thread
24.152.6.Use BackgroundWorker to run task at backgroundUse BackgroundWorker to run task at background
24.152.7.A Cancellable ProgressBar While Processing on a Background ThreadA Cancellable ProgressBar While Processing on a Background Thread
24.152.8.Show a Continuous Progress Bar While Processing on a Background ThreadShow a Continuous Progress Bar While Processing on a Background Thread
24.152.9.Using a BackgroundWorker: progress changed and completedUsing a BackgroundWorker: progress changed and completed
24.152.10.Unblock Thread with BackgroundWorkerUnblock Thread with BackgroundWorker