Check handler event sender : Event « Windows Presentation Foundation « VB.Net

1. VB.Net
2. Windows Presentation Foundation
3. Event

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.vb
Imports System
Imports System.Collections.Generic
Imports System.Linq
Imports System.Text
Imports System.Windows
Imports System.Windows.Controls
Imports System.Windows.Data
Imports System.Windows.Documents
Imports System.Windows.Input
Imports System.Windows.Media
Imports System.Windows.Media.Imaging
Imports System.Windows.Navigation
Imports System.Windows.Shapes
Imports System.Windows.Controls.Primitives

Namespace WpfApplication1
  Public Partial Class Window1
    Inherits Window
    Public Sub New()
      InitializeComponent()
    End Sub

    Private Sub btnClosePopup_Click(sender As Object, e As RoutedEventArgs)
      myPopup.IsOpen = False
    End Sub

    Private Sub btnShowPopup_Click(sender As Object, e As RoutedEventArgs)
      If sender Is btnShowPopup Then

        myPopup.IsOpen = True
      End If
    End Sub
  End Class
End Namespace

   
    
    
    
  

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