ISESteroids

2.6.3.27

WPFSamples/Full Examples/Dropdown list and data binding.ps1

#region XAML window definition
# Right-click XAML and choose WPF/Edit... to edit WPF Design
# in your favorite WPF editing tool
$xaml = @'
<Window
   xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
   xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
   MinWidth="200"
   Width ="400"
   SizeToContent="Height"
   Title="Service Stopper"
   Topmost="True">
   <Grid Margin="10,40,10,10">
      <Grid.ColumnDefinitions>
         <ColumnDefinition Width="Auto"/>
         <ColumnDefinition Width="*"/>
      </Grid.ColumnDefinitions>
      <Grid.RowDefinitions>
            <RowDefinition Height="Auto"/>
            <RowDefinition Height="Auto"/>
            <RowDefinition Height="*"/>
      </Grid.RowDefinitions>
        <TextBlock Grid.Column="1" Margin="10">Choose Service to Stop:</TextBlock>
 
      <TextBlock Grid.Column="0" Grid.Row="1" Margin="5">Service</TextBlock>
      <ComboBox Name="ComboService" Grid.Column="1" Grid.Row="1" Margin="5"></ComboBox>
       
      <StackPanel Orientation="Horizontal" HorizontalAlignment="Right" VerticalAlignment="Bottom" Margin="0,10,0,0" Grid.Row="2" Grid.ColumnSpan="2">
        <Button Name="ButOk" MinWidth="80" Height="22" Margin="5">Stop Service</Button>
        <Button Name="ButCancel" MinWidth="80" Height="22" Margin="5">Cancel</Button>
      </StackPanel>
   </Grid>
</Window>
'@

function Convert-XAMLtoWindow
{
   param
   (
    [Parameter(Mandatory)]
    [string]
    $XAML,

    [string[]]
    $NamedElement=$null,

    [switch]
    $PassThru
   )

   Add-Type -AssemblyName PresentationFramework

   $reader = [XML.XMLReader]::Create([System.IO.StringReader]$XAML)
   $result = [Windows.Markup.XAMLReader]::Load($reader)
   foreach($Name in $NamedElement)
   {
    $result | Add-Member NoteProperty -Name $Name -Value $result.FindName($Name) -Force
   }

   if ($PassThru)
   {
    $result
   }
   else
   {
    $null = $window.Dispatcher.InvokeAsync{
      $result = $window.ShowDialog()
      Set-Variable -Name result -Value $result -Scope 1
    }.Wait()
    $result
   }
}


function Show-WPFWindow
{
   param
   (
    [Parameter(Mandatory)]
    [Windows.Window]
    $Window
   )

   $result = $null
   $null = $window.Dispatcher.InvokeAsync{
    $result = $window.ShowDialog()
    Set-Variable -Name result -Value $result -Scope 1
   }.Wait()
   $result
}

$window = Convert-XAMLtoWindow -XAML $xaml -NamedElement 'ButCancel', 'ButOk', 'ComboService' -PassThru

# add click handlers
$window.ButOk.add_Click{
   # when clicked, take the selected item from the combo box and stop the service
   # using -whatif to just simulate for now
   # TODO: Remove -whatif in next line to actually stop a service
   $window.ComboService.SelectedItem | Stop-Service -WhatIf
   # update the combo box (if we really stopped a service, the list would now be shorter)
   $window.ComboService.ItemsSource = Get-Service | Where-Object Status -eq Running | Sort-Object -Property DisplayName
}

$window.ButCancel.add_Click{
   # close window
   $window.DialogResult = $false
}

# fill the combobox with some powershell objects
$window.ComboService.ItemsSource = Get-Service | Where-Object Status -eq Running | Sort-Object -Property DisplayName
# tell the combobox to use the property "DisplayName" to display the object in its list
$window.ComboService.DisplayMemberPath = 'DisplayName'
# tell the combobox to preselect the first element
$window.ComboService.SelectedIndex = 0

Show-WPFWindow -Window $window
#endregion