PowerShell WPF dynamically render close tabs button

Question

I'm trying to create a RDP manager for myself. Since a RDP manager adds and closes tabs dynamically during the use I need this to work properly in WPF.

If I add a function (method) to the button, inside the tabitem template, it works perfectly fine in visual studio. When i copy over the XAML to my PowerShell script, I cannot run a function when that button is being pressed. Since the button is inside a template i have no way to access the button controls inside the PowerShell script to create an add_click({ #somecode }).

This is my WPF tabcontrol:

 <TabControl Name="MainTabControlRDPPages" ItemsSource="{Binding Tabs}">
  <TabControl.ItemContainerStyle>
    <Style TargetType="TabItem">
      <Setter Property="HeaderTemplate">
        <Setter.Value>
          <DataTemplate DataType="local:TabViewModel">
            <Grid>
              <Grid.ColumnDefinitions>
                <ColumnDefinition Width="*" />
                <ColumnDefinition Width="Auto" />
              </Grid.ColumnDefinitions>
              <TextBlock Grid.Column="0" Text="{Binding}"/>
              <Button Grid.Column="1" x:Name="button_close" Click="RunPowershellTest">
                <Button.Template>
                  <ControlTemplate TargetType="Button">
                    <Path Data="M0,0 L8,8 M8,0 L0,8" StrokeThickness="3" VerticalAlignment="Center" Margin="5,4,0,2">
                      <Path.Style>
                        <Style TargetType="{x:Type Path}">
                          <Style.Triggers>
                            <Trigger Property="IsMouseOver" Value="False">
                            <Setter Property="Stroke" Value="LightGray" />
                          </Trigger>
                            <Trigger Property="IsMouseOver" Value="True">
                            <Setter Property="Stroke" Value="Black" />
                          </Trigger>
                          </Style.Triggers>
                        </Style>
                      </Path.Style>
                    </Path>
                  </ControlTemplate>
                </Button.Template>
              </Button>
             </Grid>
            </DataTemplate>
          </Setter.Value>
        </Setter>
      </Style>
  </TabControl.ItemContainerStyle>

  <TabItem Header="No Session" />
</TabControl>

I'm using this code in PowerShell to read all the controls and give them a name.

$reader =(New-Object System.Xml.XmlNodeReader $xaml)
$Window = [Windows.Markup.XamlReader]::Load( $reader )
$xaml.SelectNodes("//*[@Name]") | ForEach-Object { Set-Variable -Name 
($_.Name) -Value $window.FindName($_.Name) -Scope Script }

How do I make sure I can create a click event for the button_close button? If there's an option to manually add a WPF formatted tabitem during Powershell execution without specifying a template I'm fine with that too.

UPDATE

The button only needs to close the tabpage. If this can be done within XAML i'm fine with that.

You have to find the control (`$x = $Window.FindName('name')`, then assign the event handler to it (`$x.add_Close({})`). — Maximilian Burszley, Apr 06 '18 at 16:52
The control is in a template, powershell returns $null for the button name. I'm unable to find the control this way. — jr13216, Apr 06 '18 at 17:00
I don't use wpf with powershell I just do wpf. So this might not be practical. You've presumably got all that XAML in some template somewhere. Could you not associate click with a fixed event handler within that? Is #SomeCode actually going to be dynamic or is it literally just to get a reference to the tabcontrol and remove it's parent tab item out that tabcontrol? — Andy, Apr 06 '18 at 18:29
I only need the button to remove It's parent tab. An implementation within XAML is fine for me if posible. — jr13216, Apr 06 '18 at 18:57

score 0 · Accepted Answer · answered Apr 08 '18 at 07:42

Thanks to the help of someone inside a PowerShell facebook group I have the solution below. This creates a handler for the tabcontrol where it checks if a button was pressed inside the header. If yes, proceed with closing the tabpage.

[System.Windows.RoutedEventHandler]$EventontabControl = {
    $script:headerName = $_.OriginalSource
    Write-Host $headername

    $script:MainTabControlRDPPageToClose = $_.Source
    $MainTabControlRDPPages.Items.Remove($MainTabControlRDPPageToClose)
}
$MainTabControlRDPPages.AddHandler([System.Windows.Controls.Button]::ClickEvent, $EventontabControl)

PowerShell WPF dynamically render close tabs button

1 Answers1