How to Close Popup on Button click in WPF using VB.NET

Introduction
Here in this article we are discussing that how can you close a Popup on Button click in WPF. A Popup is a new primitive control in the WPF framework. A Popup is considered as a container that appears suddenly when some action is taken. A Popup window floats over a page or window providing functionality for some quick action. Popups are represented by the Popup class. The implementation of example needs StackPanel, DockPanel, Popup and Button control.


Getting Started

• Simply create a new WPF application.
• Drag StackPanel, DockPanel, Popup and Button control on your MianWindow.your window will look like below.
  
  
   
• Your MainWindow.xaml will look like below.
  
  <Window x:Class="MainWindow"
      xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
      xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
      Title="MainWindow" Height="274" Width="337">
      <StackPanel>
          <Popup AllowsTransparency="True" Height="70" HorizontalOffset="1cm" Name="popupWindow"
  Placement="Right" StaysOpen="True" Width="200" >
              <Border BorderBrush="SkyBlue" BorderThickness="2">
                  <DockPanel Background="LemonChiffon" LastChildFill="True">
                      <TextBlock Background="LemonChiffon" DockPanel.Dock="Top"
  FontSize="14" HorizontalAlignment="Stretch"
  Margin="5" Text="My first popup of WPF" />
                      <Button Click="butnExitPopup_Click" Content="Exit"
  DockPanel.Dock="Bottom" Margin="5"
  HorizontalAlignment="Right" MaxHeight="23"/>
                  </DockPanel>
              </Border>
          </Popup>
          <StackPanel>
              <StackPanel.Resources>
                  <Style TargetType="{x:Type Button}">
                      <Setter Property="Margin" Value="2" />
                      <EventSetter Event="Click" Handler="butnDisplayPopup_Click" />
                  </Style>
              </StackPanel.Resources>
              <Button Content="Display Popup" Name="butnDisplayPopup" />
          </StackPanel>
      </StackPanel>
  </Window>
   
• Add the below code in code behind file.
  
      Private Sub butnExitPopup_Click(sender As Object, e As RoutedEventArgs)
          popupWindow.IsOpen = False
      End Sub
      Private Sub butnDisplayPopup_Click(sender As Object, e As RoutedEventArgs)
          If sender Is butnDisplayPopup Then
              popupWindow.IsOpen = True
          End If
      End Sub
   
• Now run your application.

Output