How can I find node within XAML with SelectNodes? - xaml

Question

I'd like to find Button node within XAML in following PowerShell script. But I can't find it.
[xml]$xaml1 = #'
<Window
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="MainWindow" Height="400" Width="640">
<Button Content="Button" HorizontalAlignment="Left" Margin="99,20,0,0" VerticalAlignment="Top" Width="60" Height="30"/>
</Window>
'#
$xaml1.SelectNodes("//Button") | ForEach {
$_.Name
}
# No OUTOUT from above code!
When I delete line 3 and 4, it works.
[xml]$xaml2 = #'
<Window
Title="MainWindow" Height="400" Width="640">
<Button Content="Button" HorizontalAlignment="Left" Margin="99,20,0,0" VerticalAlignment="Top" Width="60" Height="30"/>
</Window>
'#
$xaml2.SelectNodes("//Button") | ForEach {
$_.Name
}
# OUTPUT of above code:
Button
How can I find node within XAML with SelectNodes?

Answer 1

I found solution by checking property of each node.The following code works fine.
$xaml.SelectNodes("//*") | ? {$_.LocalName -eq "Button"} | % {
# action for each Button Node
}
The following is sample code using above.
[xml]$xaml = #'
<Window
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="MainWindow" Height="300" Width="300">
<StackPanel>
<Button x:Name="button0" Content="Button0"/>
<Button x:Name="button1" Content="Button1"/>
<Button x:Name="button2" Content="Button2"/>
<Button x:Name="button3" Content="Button3"/>
<Button x:Name="button4" Content="Button4"/>
<Button x:Name="button5" Content="Button5"/>
<ScrollViewer x:Name="scrollViewer" Height="150">
<TextBlock x:Name="msg" TextWrapping="Wrap"/>
</ScrollViewer>
</StackPanel>
</Window>
'#
$reader = New-Object System.Xml.XmlNodeReader $xaml
$frm = [System.Windows.Markup.XamlReader]::Load($reader)
$scrollViewer = $frm.FindName("scrollViewer")
$msg = $frm.FindName("msg")
$xaml.SelectNodes("//*") | ? {$_.LocalName -eq "Button"} | % {
$button = $frm.FindName($_.Name)
$button.add_Click({
$msg.Inlines.add($this.Content + " pushed`n")
$scrollViewer.ScrollToBottom()
})
}
$result = $frm.ShowDialog()

Answer 2

I'm sorry the followings are code:
[xml]$xaml1 = #'
<Window
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
Title="MainWindow" Height="400" Width="640">
<Button Content="Button" HorizontalAlignment="Left" Margin="99,20,0,0" VerticalAlignment="Top" Width="60" Height="30"/>
</Window>
'#
[System.Xml.XmlNamespaceManager] $nsmgr = $xaml1.NameTable;
$nsmgr.AddNamespace($null, 'http://schemas.microsoft.com/winfx/2006/xaml/presentation');
$xaml1.SelectSingleNode("//Button", $nsmgr)

Answer 3

Try this:
$xaml1.Window.Button

Answer 4

$xaml.SelectNodes("//*[#Name]") | ForEach-Object {Set-Variable -Name ($.Name) -Value $Form.FindName($.Name)}
Now you have the Controls as Variable...
if the Name of a Button is "button" you have a variable $button in Powershell.
add a click like this then...
$button.add_click({write-host "clicked!!"})