<Application
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
x:Class="ActivationSample.App"
StartupUri="MainWindow.xaml"
Startup="App_Startup"
Activated="App_Activated"
Deactivated="App_Deactivated"
Exit="App_Exit">
</Application>
//File:Window.xaml.cs
using System;
using System.Windows;
using System.Windows.Forms;
using System.Windows.Threading;
namespace ActivationSample
{
public partial class App : System.Windows.Application
{
void App_Startup(object sender, StartupEventArgs e)
{
}
void App_Activated(object sender, EventArgs e)
{
Console.WriteLine("App_Activated");
}
void App_Deactivated(object sender, EventArgs e)
{
Console.WriteLine("Deactivated");
}
void App_Exit(object sender, ExitEventArgs e)
{
Console.WriteLine("Exit");
}
}
}
Windows Presentation Foundation
Cancel event by setting CanExecute and Handled to false
<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;
}
}
}
ToolBar and event handler
<Window x:Class="Commands.TwoDocument"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="TwoDocument" Height="300" Width="300">
<Window.Resources>
<CommandBinding x:Key="binding" Command="ApplicationCommands.Save" Executed="SaveCommand" CanExecute="SaveCommand_CanExecute" />
</Window.Resources>
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="Auto"></RowDefinition>
<RowDefinition Height="Auto"></RowDefinition>
<RowDefinition></RowDefinition>
<RowDefinition></RowDefinition>
</Grid.RowDefinitions>
<ToolBarTray Grid.Row="1">
<ToolBar>
<Button Command="New">New</Button>
<Button Command="Open">Open</Button>
<Button Command="Save">Save</Button>
</ToolBar>
<ToolBar>
<Button Command="Cut">Cut</Button>
<Button Command="Copy">Copy</Button>
<Button Command="Paste">Paste</Button>
</ToolBar>
</ToolBarTray>
<TextBox Margin="5" Grid.Row="2" TextWrapping="Wrap" AcceptsReturn="True" TextChanged="txt_TextChanged">
<TextBox.CommandBindings>
<StaticResource ResourceKey="binding"></StaticResource>
</TextBox.CommandBindings>
</TextBox>
</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 TwoDocument : System.Windows.Window
{
public TwoDocument()
{
InitializeComponent();
}
private void SaveCommand(object sender, ExecutedRoutedEventArgs e)
{
}
private void txt_TextChanged(object sender, RoutedEventArgs e)
{
}
private void SaveCommand_CanExecute(object sender, CanExecuteRoutedEventArgs e)
{
e.CanExecute = false;
}
}
}
Event firing sequence
<Window
x:Class="TunnelingBubbling.Window1"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="TunnelingBubbling">
<Grid MouseLeftButtonDown="MouseDownGrid" PreviewMouseLeftButtonDown="PreviewMouseDownGrid" Width="300" Height="300">
<Button PreviewMouseLeftButtonDown="PreviewMouseDownButton" MouseLeftButtonDown="MouseDownButton"
Click="MyClickEvent" Name="btnGo">
<TextBox MouseLeftButtonDown="MouseLeftButtonDown" PreviewMouseLeftButtonDown="PreviewMouseLeftButtonDown"
Width="200" Height="30" Name="textBox1">
</TextBox>
</Button>
</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;
using System.Diagnostics;
namespace TunnelingBubbling
{
public partial class Window1 : System.Windows.Window
{
public Window1()
{
InitializeComponent();
}
private void PreviewMouseDownGrid(object sender, RoutedEventArgs e)
{
Debug.WriteLine("PreviewMouseDownGrid");
}
private void PreviewMouseDownButton(object sender, RoutedEventArgs e)
{
Debug.WriteLine("PreviewMouseDownButton");
}
private void PreviewMouseLeftButtonDown(object sender, RoutedEventArgs e)
{
Debug.WriteLine("PreviewMouseLeftButtonDown");
}
private void MyClickEvent(object sender, RoutedEventArgs e)
{
Debug.WriteLine("MyClickEvent");
}
private void MouseLeftButtonDown(object sender, RoutedEventArgs e)
{
Debug.WriteLine("MouseLeftButtonDown");
}
private void MouseDownButton(object sender, RoutedEventArgs e)
{
Debug.WriteLine("MouseDownButton");
}
private void MouseDownGrid(object sender, RoutedEventArgs e)
{
Debug.WriteLine("MouseDownGrid");
}
}
}
Raise the ScrollChanged event of a ScrollViewer
<Window xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
x:Class="ScrollChangedEventArgs_layout.Window1"
Title="ScrollChangedEventArgs Sample">
<ScrollViewer>
<Border BorderBrush="Black" BorderThickness="2" Background="White">
<StackPanel HorizontalAlignment="Left" Margin="10">
<TextBlock FontSize="20" FontWeight="Bold">
ScrollChangedEvent Sample<LineBreak/>
</TextBlock>
<TextBlock Margin="0,0,0,15">Use the ScrollBar to activate the ScrollChanged event.</TextBlock>
<Button Name="btn1" Click="scrollTrue">Enable Content Scrolling</Button>
<ScrollViewer Name="sv1" CanContentScroll="False" ScrollChanged="sChanged">
<FlowDocument FontFamily="Arial" PageWidth="400">
<Paragraph>
Lorem ipsum dolor sit amet, consectetuer adipiscing elit, sed diam nonummy nibh euismod tincidunt ut
laoreet dolore magna aliquam erat volutpat. Ut wisi enim ad minim veniam, quis nostrud exerci tation
ullamcorper suscipit lobortis nisl ut aliquip ex ea commodo consequat. Duis autem vel eum iriure.
Lorem ipsum dolor sit amet, consectetuer adipiscing elit, sed diam nonummy nibh euismod tincidunt ut
laoreet dolore magna aliquam erat volutpat. Ut wisi enim ad minim veniam, quis nostrud exerci tation
ullamcorper suscipit lobortis nisl ut aliquip ex ea commodo consequat. Duis autem vel eum iriure.
Lorem ipsum dolor sit amet, consectetuer adipiscing elit, sed diam nonummy nibh euismod tincidunt ut
laoreet dolore magna aliquam erat volutpat. Ut wisi enim ad minim veniam, quis nostrud exerci tation
ullamcorper suscipit lobortis nisl ut aliquip ex ea commodo consequat. Duis autem vel eum iriure.
</Paragraph>
<Paragraph>
Lorem ipsum dolor sit amet, consectetuer adipiscing elit, sed diam nonummy nibh euismod tincidunt ut
laoreet dolore magna aliquam erat volutpat. Ut wisi enim ad minim veniam, quis nostrud exerci tation
ullamcorper suscipit lobortis nisl ut aliquip ex ea commodo consequat. Duis autem vel eum iriure.
Lorem ipsum dolor sit amet, consectetuer adipiscing elit, sed diam nonummy nibh euismod tincidunt ut
laoreet dolore magna aliquam erat volutpat. Ut wisi enim ad minim veniam, quis nostrud exerci tation
ullamcorper suscipit lobortis nisl ut aliquip ex ea commodo consequat. Duis autem vel eum iriure.
Lorem ipsum dolor sit amet, consectetuer adipiscing elit, sed diam nonummy nibh euismod tincidunt ut
laoreet dolore magna aliquam erat volutpat. Ut wisi enim ad minim veniam, quis nostrud exerci tation
ullamcorper suscipit lobortis nisl ut aliquip ex ea commodo consequat. Duis autem vel eum iriure.
</Paragraph>
<Paragraph>
Lorem ipsum dolor sit amet, consectetuer adipiscing elit, sed diam nonummy nibh euismod tincidunt ut
laoreet dolore magna aliquam erat volutpat. Ut wisi enim ad minim veniam, quis nostrud exerci tation
ullamcorper suscipit lobortis nisl ut aliquip ex ea commodo consequat. Duis autem vel eum iriure.
Lorem ipsum dolor sit amet, consectetuer adipiscing elit, sed diam nonummy nibh euismod tincidunt ut
laoreet dolore magna aliquam erat volutpat. Ut wisi enim ad minim veniam, quis nostrud exerci tation
ullamcorper suscipit lobortis nisl ut aliquip ex ea commodo consequat. Duis autem vel eum iriure.
Lorem ipsum dolor sit amet, consectetuer adipiscing elit, sed diam nonummy nibh euismod tincidunt ut
laoreet dolore magna aliquam erat volutpat. Ut wisi enim ad minim veniam, quis nostrud exerci tation
ullamcorper suscipit lobortis nisl ut aliquip ex ea commodo consequat. Duis autem vel eum iriure.
</Paragraph>
<Paragraph>
Lorem ipsum dolor sit amet, consectetuer adipiscing elit, sed diam nonummy nibh euismod tincidunt ut
laoreet dolore magna aliquam erat volutpat. Ut wisi enim ad minim veniam, quis nostrud exerci tation
ullamcorper suscipit lobortis nisl ut aliquip ex ea commodo consequat. Duis autem vel eum iriure.
Lorem ipsum dolor sit amet, consectetuer adipiscing elit, sed diam nonummy nibh euismod tincidunt ut
laoreet dolore magna aliquam erat volutpat. Ut wisi enim ad minim veniam, quis nostrud exerci tation
ullamcorper suscipit lobortis nisl ut aliquip ex ea commodo consequat. Duis autem vel eum iriure.
Lorem ipsum dolor sit amet, consectetuer adipiscing elit, sed diam nonummy nibh euismod tincidunt ut
laoreet dolore magna aliquam erat volutpat. Ut wisi enim ad minim veniam, quis nostrud exerci tation
ullamcorper suscipit lobortis nisl ut aliquip ex ea commodo consequat. Duis autem vel eum iriure.
</Paragraph>
<Paragraph>
Lorem ipsum dolor sit amet, consectetuer adipiscing elit, sed diam nonummy nibh euismod tincidunt ut
laoreet dolore magna aliquam erat volutpat. Ut wisi enim ad minim veniam, quis nostrud exerci tation
ullamcorper suscipit lobortis nisl ut aliquip ex ea commodo consequat. Duis autem vel eum iriure.
Lorem ipsum dolor sit amet, consectetuer adipiscing elit, sed diam nonummy nibh euismod tincidunt ut
laoreet dolore magna aliquam erat volutpat. Ut wisi enim ad minim veniam, quis nostrud exerci tation
ullamcorper suscipit lobortis nisl ut aliquip ex ea commodo consequat. Duis autem vel eum iriure.
Lorem ipsum dolor sit amet, consectetuer adipiscing elit, sed diam nonummy nibh euismod tincidunt ut
laoreet dolore magna aliquam erat volutpat. Ut wisi enim ad minim veniam, quis nostrud exerci tation
ullamcorper suscipit lobortis nisl ut aliquip ex ea commodo consequat. Duis autem vel eum iriure.
</Paragraph>
<Paragraph>
Lorem ipsum dolor sit amet, consectetuer adipiscing elit, sed diam nonummy nibh euismod tincidunt ut
laoreet dolore magna aliquam erat volutpat. Ut wisi enim ad minim veniam, quis nostrud exerci tation
ullamcorper suscipit lobortis nisl ut aliquip ex ea commodo consequat. Duis autem vel eum iriure.
Lorem ipsum dolor sit amet, consectetuer adipiscing elit, sed diam nonummy nibh euismod tincidunt ut
laoreet dolore magna aliquam erat volutpat. Ut wisi enim ad minim veniam, quis nostrud exerci tation
ullamcorper suscipit lobortis nisl ut aliquip ex ea commodo consequat. Duis autem vel eum iriure.
Lorem ipsum dolor sit amet, consectetuer adipiscing elit, sed diam nonummy nibh euismod tincidunt ut
laoreet dolore magna aliquam erat volutpat. Ut wisi enim ad minim veniam, quis nostrud exerci tation
ullamcorper suscipit lobortis nisl ut aliquip ex ea commodo consequat. Duis autem vel eum iriure.
</Paragraph>
</FlowDocument>
</ScrollViewer>
</StackPanel>
</Border>
</ScrollViewer>
</Window>
//File:Window.xaml.cs
using System;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
namespace ScrollChangedEventArgs_layout
{
public partial class Window1 : Window
{
public void scrollTrue(object sender, RoutedEventArgs e)
{
sv1.CanContentScroll = true;
sv1.Height = 600;
btn1.Visibility = Visibility.Collapsed;
}
public void sChanged(object sender, ScrollChangedEventArgs e)
{
if (sv1.CanContentScroll == true)
{
Console.WriteLine("ScrollChangedEvent just Occurred");
Console.WriteLine("ExtentHeight is now " + e.ExtentHeight.ToString());
Console.WriteLine("ExtentWidth is now " + e.ExtentWidth.ToString());
Console.WriteLine("ExtentHeightChange was " + e.ExtentHeightChange.ToString());
Console.WriteLine("ExtentWidthChange was " + e.ExtentWidthChange.ToString());
Console.WriteLine("HorizontalOffset is now " + e.HorizontalOffset.ToString());
Console.WriteLine("VerticalOffset is now " + e.VerticalOffset.ToString());
Console.WriteLine("HorizontalChange was " + e.HorizontalChange.ToString());
Console.WriteLine("VerticalChange was " + e.VerticalChange.ToString());
Console.WriteLine("ViewportHeight is now " + e.ViewportHeight.ToString());
Console.WriteLine("ViewportWidth is now " + e.ViewportWidth.ToString());
Console.WriteLine("ViewportHeightChange was " + e.ViewportHeightChange.ToString());
Console.WriteLine("ViewportWidthChange was " + e.ViewportWidthChange.ToString());
}
}
}
}
Generate Click Events Repeatedly While a Button Is Clicked
<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>
<Slider Name="slider" Maximum="100" Minimum="0" Value="50" />
<StackPanel Orientation="Horizontal">
<RepeatButton Click="SliderLeft_Click" Content="Click Me"
Height="23" Margin="10" Width="70"
ToolTip="Click to move slider left" />
<RepeatButton Click="SliderRight_Click" ClickMode="Hover"
Content="Touch Me" Height="23" Margin="10"
ToolTip="Hover to move slider right" Width="70" />
</StackPanel>
</StackPanel>
</Window>
//File:Window.xaml.cs
using System.Windows;
namespace WpfApplication1
{
public partial class Window1 : Window
{
public Window1()
{
InitializeComponent();
}
private void SliderLeft_Click(object sender, RoutedEventArgs e)
{
slider.Value -= 1;
}
private void SliderRight_Click(object sender, RoutedEventArgs e)
{
slider.Value += 1;
}
}
}
Check handler event sender
<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="150" Width="250">
<StackPanel>
<Popup AllowsTransparency="True" Height="100" HorizontalOffset="1cm" Name="myPopup"
Placement="Right" StaysOpen="True" Width="200" >
<Border BorderBrush="Black" BorderThickness="2">
<DockPanel Background="White" LastChildFill="True">
<TextBlock Background="AliceBlue" DockPanel.Dock="Top"
FontSize="16" HorizontalAlignment="Stretch"
Margin="5" Text="A WPF Popup" />
<Button Click="btnClosePopup_Click" Content="Close"
DockPanel.Dock="Bottom" Margin="5"
HorizontalAlignment="Right" MaxHeight="23"/>
<Image DockPanel.Dock="Top" Margin="5"
Source="c:image.gif" />
</DockPanel>
</Border>
</Popup>
<StackPanel>
<StackPanel.Resources>
<Style TargetType="{x:Type Button}">
<Setter Property="Margin" Value="2" />
<EventSetter Event="Click" Handler="btnShowPopup_Click" />
</Style>
</StackPanel.Resources>
<Button Content="Show Popup" Name="btnShowPopup" />
</StackPanel>
</StackPanel>
</Window>
//File:Window.xaml.cs
using System;
using System.Collections.Generic;
using System.Linq;
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.Navigation;
using System.Windows.Shapes;
using System.Windows.Controls.Primitives;
namespace WpfApplication1
{
public partial class Window1 : Window
{
public Window1()
{
InitializeComponent();
}
private void btnClosePopup_Click(object sender, RoutedEventArgs e)
{
myPopup.IsOpen = false;
}
private void btnShowPopup_Click(object sender, RoutedEventArgs e)
{
if (sender == btnShowPopup){
myPopup.IsOpen = true;
}
}
}
}