I am new to XAML and Visual Studio and am working on my first project. When try to load my code into Powershell, I get the following error,
"Exception calling "Load" with "1" argument(s): "Cannot create unknown type '{http://schemas.microsoft.com/winfx/2006/xaml/presentation}Null'." To show the form, run the following You cannot call a method on a null-valued expression. At C:\FileLocation.ps1:320 char:1
$Form1.ShowDialog() | out-null
- CategoryInfo : InvalidOperation: (:) [], RuntimeException
- FullyQualifiedErrorId : InvokeMethodOnNull If I remove "xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" from my code I get the error,
"Exception calling "Load" with "1" argument(s): "Cannot create unknown type 'Window'."
Below is my entire code:
$inputXML = @"
<Window x:Class="JICXAML.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:local="clr-namespace:JICXAML"
xmlns:fa="http://schemas.awesome.incremented/wpf/xaml/fontawesome.sharp"
mc:Ignorable="d" Height="740" Width="900" WindowStartupLocation="CenterScreen"
WindowStyle="None" AllowsTransparency="True" Background="Transparent" ResizeMode="CanResizeWithGrip">
<Window.Resources>
<Style x:Key="menuButton" TargetType="Button">
<Setter Property="Background" Value="Transparent" />
<Setter Property="Foreground" Value="#707db2" />
<Setter Property="Margin" Value="0 0 0 5"/>
<Setter Property="Height" Value="45"/>
<Setter Property="FocusVisualStyle" Value="{x:Null}"/>
<Setter Property="Tag" Value="#6673b7"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="Button">
<Border Background="{TemplateBinding Background}" BorderThickness=" 4 0 0 0" BorderBrush="Transparent">
<ContentPresenter HorizontalAlignment="Stretch" VerticalAlignment="Center"/>
</Border>
</ControlTemplate>
</Setter.Value>
</Setter>
<Style.Triggers>
<Trigger Property="IsMouseOver" Value="True">
<Setter Property="Foreground" Value="#bccaf1"/>
<Setter Property="Tag" Value="#E9A422"/>
<Setter Property="Background">
<Setter.Value>
<LinearGradientBrush StartPoint="0, 0.5" EndPoint="1,0.5">
<GradientStop Color="#31407b" Offset="0"/>
<GradientStop Color="#495385" Offset="3"/>
</LinearGradientBrush>
</Setter.Value>
</Setter>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="Button">
<Border Background="{TemplateBinding Background}" BorderThickness="4 0 0 0" BorderBrush="#a5a1f5">
<ContentPresenter HorizontalAlignment="Stretch" VerticalAlignment="Center"/>
</Border>
</ControlTemplate>
</Setter.Value>
</Setter>
</Trigger>
</Style.Triggers>
</Style>
<Style x:Key="menuButtonIcon" TargetType="fa:IconImage">
<Setter Property="Width" Value="23"/>
<Setter Property="Height" Value="23"/>
<Setter Property="Margin" Value="5 0 20 0"/>
<Setter Property="Foreground" Value="{Binding Path=Tag, RelativeSource= {RelativeSource FindAncestor, AncestorType={x:Type Button}}}"/>
</Style>
<Style x:Key="menuButtonText" TargetType="TextBlock">
<Setter Property="FontSize" Value="17"/>
<Setter Property="Margin" Value="-25 0 0 0"/>
<Setter Property="VerticalAlignment" Value="Center"/>
<Setter Property="Foreground" Value="{Binding Path=Foreground,RelativeSource= {RelativeSource FindAncestor, AncestorType={x:Type Button}}}"/>
</Style>
<Style x:Key="menuButtonActive" TargetType="Button">
<Setter Property="Background">
<Setter.Value>
<LinearGradientBrush StartPoint="0, 0.5" EndPoint="1,0.5">
<GradientStop Color="#31407b" Offset="0"/>
<GradientStop Color="#495385" Offset="3"/>
</LinearGradientBrush>
</Setter.Value>
</Setter>
<Setter Property="Foreground" Value="#707db2"/>
<Setter Property="Margin" Value="0 0 0 5"/>
<Setter Property="Height" Value="45"/>
<Setter Property="FocusVisualStyle" Value="{x:Null}"/>
<Setter Property="Tag" Value="#7071f0"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="Button">
<Border Background="{TemplateBinding Background}" BorderThickness=" 4 0 0 0" BorderBrush="#a5a1f5">
<ContentPresenter HorizontalAlignment="Stretch" VerticalAlignment="Center"/>
</Border>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
<Style x:Key="topMenuButton" TargetType="Button">
<Setter Property="Background" Value="Transparent" />
<Setter Property="Foreground" Value="#707db2" />
<Setter Property="Margin" Value="-40 10 10 -60"/>
<Setter Property="Height" Value="45"/>
<Setter Property="FocusVisualStyle" Value="{x:Null}"/>
<Setter Property="Tag" Value="#6673b7"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="Button">
<Border Background="{TemplateBinding Background}" BorderThickness=" 4 0 0 0" BorderBrush="Transparent">
<ContentPresenter HorizontalAlignment="Stretch" VerticalAlignment="Center"/>
</Border>
</ControlTemplate>
</Setter.Value>
</Setter>
<Style.Triggers>
<Trigger Property="IsMouseOver" Value="True">
<Setter Property="Tag" Value="#E9A422"/>
<Setter Property="Foreground" Value="{Binding Path=Tag, RelativeSource= {RelativeSource FindAncestor, AncestorType={x:Type Button}}}"/>
<Setter Property="Effect">
<Setter.Value>
<DropShadowEffect/>
</Setter.Value>
</Setter>
</Trigger>
</Style.Triggers>
</Style>
</Window.Resources>
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="250"/>
<ColumnDefinition Width="*"/>
</Grid.ColumnDefinitions>
<!--Left Menu-->
<Border CornerRadius="10 0 0 10" MouseDown="Border_MouseDown">
<Border.Background>
<LinearGradientBrush StartPoint="0.5,0" EndPoint="0.5,10.5">
<GradientStop Color="#223266" Offset="0"/>
<GradientStop Color="#27396b" Offset=".5"/>
</LinearGradientBrush>
</Border.Background>
<StackPanel>
<!--Logo-->
<StackPanel Orientation="Horizontal" HorizontalAlignment="Center" Margin="0 35 0 0">
<Border Width="40" Height="40">
<Image Source="C:\Users\Angel\source\repos\JICXAML\jic_logo_final.png" Margin="-75,-34,-57,-141">
</Image>
</Border>
</StackPanel>
<Separator Height="1" Margin="10 111" Background="#46558a"/>
<!--Menu Buttons-->
<Button Style="{StaticResource menuButton}">
<StackPanel Orientation="Horizontal">
<fa:IconImage Icon="Users" Style="{StaticResource menuButtonIcon}" Width="70" Height="30"/>
<TextBlock Text="Find User" Style="{StaticResource menuButtonText}"/>
</StackPanel>
</Button>
<Button Style="{StaticResource menuButton}">
<StackPanel Orientation="Horizontal">
<fa:IconImage Icon="Computer" Style="{StaticResource menuButtonIcon}" Width="70" Height="30"/>
<TextBlock Text="Find Computer" Style="{StaticResource menuButtonText}"/>
</StackPanel>
</Button>
<Button Style="{StaticResource menuButton}">
<StackPanel Orientation="Horizontal">
<fa:IconImage Icon="Print" Style="{StaticResource menuButtonIcon}" Width="70" Height="30"/>
<TextBlock Text="Find Printer" Style="{StaticResource menuButtonText}"/>
</StackPanel>
</Button>
<Button Style="{StaticResource menuButton}">
<StackPanel Orientation="Horizontal">
<fa:IconImage Icon="CompactDisc" Style="{StaticResource menuButtonIcon}" Width="70" Height="30"/>
<TextBlock Text="Install Apps" Style="{StaticResource menuButtonText}"/>
</StackPanel>
</Button>
<Button Style="{StaticResource menuButton}">
<StackPanel Orientation="Horizontal">
<fa:IconImage Icon="Columns" Style="{StaticResource menuButtonIcon}" Width="70" Height="30"/>
<TextBlock Text="Legacy Panels" Style="{StaticResource menuButtonText}"/>
</StackPanel>
</Button>
</StackPanel>
</Border>
<!--Main Section-->
<Border Grid.Column="1" CornerRadius="0 10 10 0" MouseDown="Border_MouseDown">
<Border.Background>
<LinearGradientBrush StartPoint="1,0" EndPoint="0,1">
<GradientStop Color="#223266" Offset="1"/>
<GradientStop Color="#41518f" Offset="1"/>
</LinearGradientBrush>
</Border.Background>
<Grid>
<!--Top Menu-->
<Grid.RowDefinitions>
<RowDefinition Height="35" MinHeight="20" />
<RowDefinition Height="*"/>
</Grid.RowDefinitions>
<Border Grid.Row="1" CornerRadius="0 0 10 0" MouseDown="Border_MouseDown">
<Border.Background>
<LinearGradientBrush StartPoint="1,0" EndPoint="0,1">
<GradientStop Color="#41518f" Offset="0"/>
<GradientStop Color="#2c386c" Offset="1"/>
</LinearGradientBrush>
</Border.Background>
</Border>
<StackPanel Orientation="Horizontal" VerticalAlignment="Center" HorizontalAlignment="Left" Margin="0 0,0,0" Height="60" Width="203">
<Button Style="{StaticResource topMenuButton}">
<StackPanel Orientation="Horizontal" Margin="20,0,0,0">
<fa:IconImage Icon="WindowMinimize" Style="{StaticResource menuButtonIcon}" Width="20" Height="30" Margin="40,-50,0,15"/>
</StackPanel>
</Button>
<Button Style="{StaticResource topMenuButton}">
<StackPanel Orientation="Horizontal">
<fa:IconImage Icon="WindowRestore" Style="{StaticResource menuButtonIcon}" Width="20" Height="30" Margin="60,-50,5,15"/>
</StackPanel>
</Button>
<Button Style="{StaticResource topMenuButton}">
<StackPanel Orientation="Horizontal">
<fa:IconImage Icon="WindowClose" Style="{StaticResource menuButtonIcon}" Width="20" Height="30" Margin="60,-50,20,15"/>
</StackPanel>
</Button>
<Menu Margin="0,0,0,697">
<MenuItem Header="File">
<MenuItem Header="Exit"/>
</MenuItem>
</Menu>
</StackPanel>
</Grid>
</Border>
</Grid>
</Window>
"@
$inputXML = $inputXML -replace 'mc:Ignorable="d"','' -replace "x:N",'N' -replace '^<Win.*', '<Window'
[void][System.Reflection.Assembly]::LoadWithPartialName('presentationframework')
[xml]$XAML = $inputXML
#Read XAML
$reader=(New-Object System.Xml.XmlNodeReader $xaml)
try{$Form1=[Windows.Markup.XamlReader]::Load( $reader )}
catch [System.Management.Automation.MethodInvocationException] {
Write-Warning "We ran into a problem with the XAML code. Check the syntax for this control..."
write-host $error[0].Exception.Message -ForegroundColor Red
If ($error[0].Exception.Message -like "*button*") {
write-warning "Ensure your <button in the `$inputXML does NOT have a Click=ButtonClick property. PS can't handle this`n`n`n`n"
}
}
catch{# If it broke some other way <img draggable="false" role="img" class="emoji" alt="😀" src="https://s0.wp.com/wp-content/mu-plugins/wpcom-smileys/twemoji/2/svg/1f600.svg">
Write-Host "Unable to load Windows.Markup.XamlReader. Double-check syntax and ensure .net is installed."
}
#===========================================================================
#Store Form Objects In PowerShell
#===========================================================================
$xaml.SelectNodes("//*[@Name]") | %{Set-Variable -Name "WPF$($_.Name)" -Value $Form.FindName($_.Name)}
Function Get-FormVariables{
If ($global:ReadmeDisplay -ne $true){Write-host "If you need to reference this display again, run Get-FormVariables" -ForegroundColor Yellow;$global:ReadmeDisplay=$true}
write-host "Found the following interactable elements from our form" -ForegroundColor Cyan
get-variable WPF*
}
#===========================================================================
# Shows the form
#===========================================================================
write-host "To show the form, run the following" -ForegroundColor Cyan
$Form1.ShowDialog() | out-null
Alternatively, if anyone knows how to run powershell commandlets in XAML, that would be great too. Thanks for any help that anyone can provide.
