<Window x:Class="Commands.NoCommandTextBox"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="NoCommandTextBox" Height="300" Width="300">
    <Grid>
      <TextBox Name="txt"/>
    </Grid>
</Window>
//File:Window.xaml.cs
using System;
using System.Collections.Generic;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Shapes;

namespace Commands
{
    public partial class NoCommandTextBox : System.Windows.Window
    {
        public NoCommandTextBox()
        {
            InitializeComponent();           
        
            txt.CommandBindings.Add(new CommandBinding(ApplicationCommands.Cut, null, SuppressCommand));

        }
     
        private void SuppressCommand(object sender, CanExecuteRoutedEventArgs e)
        {
            e.CanExecute = false;
            e.Handled = true;
        }
    }
}

   
     

Start



//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]

Start




//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]

Start



//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]

Start


//File:Window.xaml.cs

using System;
using System.ComponentModel;
using System.Threading;
using System.Windows;
using System.Windows.Input;

namespace WpfApplication1
{
public partial class Window1 : Window
{
private readonly BackgroundWorker worker;

public Window1()
{
InitializeComponent();
worker = this.FindResource(“backgroundWorker”) as BackgroundWorker;
}

private void button_Click(object sender, RoutedEventArgs e)
{
if(!worker.IsBusy)
{
this.Cursor = Cursors.Wait;
worker.RunWorkerAsync();
button.Content = “Cancel”;
}else{
worker.CancelAsync();
}
}

private void BackgroundWorker_DoWork(object sender, System.ComponentModel.DoWorkEventArgs e)
{
for(int i = 1; i <= 100; i++) { if(worker.CancellationPending) break; Thread.Sleep(100); worker.ReportProgress(i); } } private void BackgroundWorker_RunWorkerCompleted(object sender, System.ComponentModel.RunWorkerCompletedEventArgs e) { this.Cursor = Cursors.Arrow; Console.WriteLine(e.Error.Message); button.Content = "Start"; } private void BackgroundWorker_ProgressChanged(object sender, System.ComponentModel.ProgressChangedEventArgs e) { progressBar.Value = e.ProgressPercentage; } } } [/csharp]

Start

//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; } } } [/csharp]

Start

//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; } } } [/csharp]