WPF UserControl

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    • #49571
      Topics: 2
      Replies: 2
      Points: 0
      Rank: Member

      The requirement is to display a user control in a tab item. The below is the code I am trying. I am trying to use a WPF User control in PowerShell. Everything is working fine but when I select the tab item then getting the focus error.

      I tried to resolve it by own and even tried to seek help from others but unfortunately unable to fix it.

      Add-Type -AssemblyName PresentationFramework
      [xml]$MainXAML = @"
      [xml]$UserControlXAML = @"
      $MainReader = New-Object System.Xml.XmlNodeReader $MainXAML
      $Window_Main= [Windows.Markup.XamlReader]::Load($MainReader) in 
      $UC_Reader = New-Object System.Xml.XmlNodeReader $UserControlXAML
      $Window_UC= [Windows.Markup.XamlReader]::Load($UC_Reader)
      $MainXAML.SelectNodes("//*[@Name]") | %{ Set-Variable -Name ("WPF_Main_"+$_.Name) -Value $Window_Main.FindName($_.Name) -Scope "Script" }
      $UserControlXAML.SelectNodes("//*[@Name]") | %{ Set-Variable -Name ("WPF_UC_"+$_.Name) -Value $Window_UC.FindName($_.Name) -Scope "Script" }
          Write-Host -ForegroundColor Green "I am in the click event."
          $TabItem1 = New-Object System.Windows.Controls.TabItem
          $TabItem1.Header = "Eureka"

      Error that I am getting

      Hide   Copy Code
      Exception calling "ShowDialog" with "0" argument(s): "Must disconnect specified child from current parent Visual before attaching to new parent Visual."
      At line:50 char:1
      + $Window_Main.ShowDialog()
      + ~~~~~~~~~~~~~~~~~~~~~~~~~
          + CategoryInfo          : NotSpecified: (:) [], MethodInvocationException
          + FullyQualifiedErrorId : ArgumentException
    • #49626
      Topics: 13
      Replies: 4872
      Points: 1,844
      Helping HandTeam Member
      Rank: Community Hero

      Sadly, and I hate to do this, but you might get better results in StackOverflow – more developers there, more playing with WPF. But please, if you do figure it out, a link to the solution will be appreciated by future generations ;).

    • #49664
      Topics: 0
      Replies: 20
      Points: 0
      Rank: Member

      Can you try to re-paste your code? I'm not seeing any of the XAML code so I cannot test to see what the issue might be.

      • #49668
        Topics: 2
        Replies: 2
        Points: 0
        Rank: Member

        Hi Prox,
        every time the xml part is vanishing. Let me try gist. In other hand may I have your email address so that I can post it to you?

    • #49741
      Topics: 2
      Replies: 2
      Points: 0
      Rank: Member

      I have fixed this issue. I am unable to paste the solved code here since xml part is auto wiping. The solution is, we should create all the controls with in a grid control and add only the grid control to the target control 🙂

    • #101277
      Topics: 0
      Replies: 1
      Points: 0
      Rank: Member

      Hi Sagar,

      Would you please provide an example in plain text? I am running into the same problem using User Control within PowerShell.

      As you can see from my example below, I get a namespace error when I try implementing UserControls within PowerShell. Am I wrong, is it possible? Any help is appreciated.

      For example:
      If I tried implementing a XAML User Control and binding it with PowerShell but it fails with a namespace error. My test project has two XAML files and one PS1 script that can be found in my GitHub.


      Project files
      1. MainWindow.xaml
      2. MyListBoxItem.xaml
      3. UsrControl.PS1

      PowerShell error:
      PS C:\WINDOWS\system32> C:\Temp\UserControl\usrcontrol.ps1
      Get-ChildItem : Exception calling "Load" with "1" argument(s): "Cannot create unknown type '{clr-namespace:Test.Controls;assembly=Test.Controls}MyListBoxItem'."
      At C:\Temp\UserControl\usrcontrol.ps1:68 char:8
      + $wpf = Get-ChildItem -Path $path -Filter *.xaml -file | Where-Object ...
      + ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
      + CategoryInfo : NotSpecified: (:) [Get-ChildItem], MethodInvocationException
      + FullyQualifiedErrorId : XamlParseException,Microsoft.PowerShell.Commands.GetChildItemCommand

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