Implement INotifyPropertyChanged to notify the binding targets when the values of properties change.
Bind to an Existing Object Instance
Digital Clock
Add ApplicationCommands.Cut to TextBox with TextBox.CommandBindings
Execute a Method Asynchronously Using a Background Worker Thread
//File:Window.xaml.cs
using System;
using System.Windows;
using System.ComponentModel;
namespace WpfApplication1
{
public partial class Window1 : Window
{
private BackgroundWorker worker = new BackgroundWorker();
private long from= 1;
private long to = 200;
private long biggestPrime;
public Window1(): base()
{
InitializeComponent();
worker.DoWork += new DoWorkEventHandler(worker_DoWork);
worker.RunWorkerCompleted += new RunWorkerCompletedEventHandler(worker_RunWorkerCompleted);
}
private void Start_Click(object sender, RoutedEventArgs e)
{
worker.RunWorkerAsync();
btnStart.IsEnabled = false;
txtBiggestPrime.Text = string.Empty;
}
private void worker_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
{
btnStart.IsEnabled = true;
txtBiggestPrime.Text = biggestPrime.ToString();
}
private void worker_DoWork(object sender, DoWorkEventArgs e)
{
for(long current = from; current <= to; current++)
{
biggestPrime = current;
}
}
}
}
[/csharp]
Track the Progress of a Background Worker Thread
//File:Window.xaml.cs
using System;
using System.ComponentModel;
using System.Windows;
namespace WpfApplication1
{
public partial class Window1 : Window
{
private BackgroundWorker worker = new BackgroundWorker();
private long from = 2;
private long to = 20000;
private long biggestPrime;
public Window1() : base()
{
InitializeComponent();
worker.WorkerReportsProgress = true;
worker.DoWork += new DoWorkEventHandler(worker_DoWork);
worker.RunWorkerCompleted += new RunWorkerCompletedEventHandler(worker_RunWorkerCompleted);
worker.ProgressChanged += worker_ProgressChanged;
}
private void StartStop_Click(object sender, RoutedEventArgs e)
{
worker.RunWorkerAsync();
btnStartStop.IsEnabled = false;
txtBiggestPrime.Text = string.Empty;
}
private void worker_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
{
btnStartStop.IsEnabled = true;
txtBiggestPrime.Text = biggestPrime.ToString();
}
private void worker_DoWork(object sender, DoWorkEventArgs e)
{
for(long current = from; current <= to; current++){
biggestPrime = current;
int percentComplete = Convert.ToInt32(((double) current / to) * 100d);
worker.ReportProgress(percentComplete);
System.Threading.Thread.Sleep(10);
}
}
private void worker_ProgressChanged(object sender, ProgressChangedEventArgs e)
{
txtPercent.Text = e.ProgressPercentage.ToString() + "%";
}
}
}
[/csharp]
Support the Cancellation of a Background Worker Thread
//File:Window.xaml.cs
using System;
using System.ComponentModel;
using System.Windows;
namespace WpfApplication1
{
public partial class Window1 : Window
{
private BackgroundWorker worker = new BackgroundWorker();
private long from = 2;
private long to = 2000;
private long biggestPrime;
public Window1(): base()
{
InitializeComponent();
worker.WorkerSupportsCancellation = true;
worker.DoWork += new DoWorkEventHandler(worker_DoWork);
worker.RunWorkerCompleted += new RunWorkerCompletedEventHandler(worker_RunWorkerCompleted);
}
private void StartStop_Click(object sender, RoutedEventArgs e)
{
if(!worker.IsBusy)
{
worker.RunWorkerAsync();
btnStartStop.Content = “Cancel”;
txtBiggestPrime.Text = string.Empty;
}
else
{
worker.CancelAsync();
}
}
private void worker_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
{
if(e.Cancelled)
{
MessageBox.Show(“Operation was canceled”);
}
btnStartStop.Content = “Start”;
txtBiggestPrime.Text = biggestPrime.ToString();
}
private void worker_DoWork(object sender, DoWorkEventArgs e)
{
for(long current = from; current <= to; current++)
{
if(worker.CancellationPending)
{
e.Cancel = true;
return;
}
biggestPrime = current;
}
}
}
}
[/csharp]