xmlns:x='http://schemas.microsoft.com/winfx/2006/xaml'
xmlns:d='http://schemas.microsoft.com/expression/blend/2008'
xmlns:mc='http://schemas.openxmlformats.org/markup-compatibility/2006'
mc:Ignorable='d'
d:DesignWidth='640'
d:DesignHeight='480'>
Start
//File:Window.xaml.cs
using System.ComponentModel;
using System.Threading;
using System.Windows;
using System.Windows.Input;
using System;
using System.Windows.Controls;
namespace SilverlightApplication3
{
public partial class MainPage : UserControl
{
private BackgroundWorker worker = new BackgroundWorker();
public MainPage()
{
InitializeComponent();
worker.WorkerSupportsCancellation = true;
worker.DoWork += new DoWorkEventHandler(worker_DoWork);
worker.RunWorkerCompleted += new RunWorkerCompletedEventHandler(worker_RunWorkerCompleted);
}
private void button_Click(object sender, RoutedEventArgs e)
{
if (!worker.IsBusy)
{
this.Cursor = Cursors.Wait;
progressBar.IsIndeterminate = true;
button.Content = "Cancel";
worker.RunWorkerAsync();
}
else
{
worker.CancelAsync();
}
}
private void worker_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
{
this.Cursor = Cursors.Arrow;
if (e.Error != null)
{
Console.WriteLine(e.Error.Message);
}
button.Content = "Start";
progressBar.IsIndeterminate = false;
}
private void worker_DoWork(object sender, DoWorkEventArgs e){
for (int i = 1; i <= 100; i++)
{
if (worker.CancellationPending)
break;
Thread.Sleep(50);
}
}
}
}