使用嵌入式 XAML GUI 更改 Powershell 脚本中的标题栏图标

Question

这是我的第一篇文章。我正在使用用于 GUI 的嵌入式 XAML 代码在 Powershell 中编写脚本启动器应用程序。 XAML 在 Visual Studio 中粗略制作，然后导出到 Powershell 并手动调整。简单且可维护，但我一直在尝试更改应用程序的标题栏图标。更改图标是内部品牌需求。

通用 Powershell 图标确实出现在我的应用程序的标题栏中。而且我想我已经尝试调整本网站和其他地方提到的每一种 XAML 和代码隐藏技术来安装我自己的 ICO 图标。没有喜悦。有些需要使用 Visual Studio，我希望不要再使用了。最简单的建议 XAML 路由似乎是添加这样的一行...

Icon="MyFavicon.ico"

...在下面测试平台的标题行下方。但这会引发此错误：

Exception calling "Load" with "1" argument(s): "Failed to create a 'Icon' from the text 'StribLogoFavicon.ico'."
At M:\Scripting\Saxophone\Test\trivial_xaml_and_ps_for_icon_troubleshooting_v18.ps1:26 char:2
+     $Window = [Windows.Markup.XamlReader]::Load($Reader)
+     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : NotSpecified: (:) [], MethodInvocationException
    + FullyQualifiedErrorId : XamlParseException

You cannot call a method on a null-valued expression.
At M:\Scripting\Saxophone\Test\trivial_xaml_and_ps_for_icon_troubleshooting_v18.ps1:28 char:1
+ $Window.ShowDialog()
+ ~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : InvalidOperation: (:) [], RuntimeException
    + FullyQualifiedErrorId : InvokeMethodOnNull

FWIW，相同的 ICO 文件以前在该项目的 HTA 版本的标题栏中工作。我还尝试了第二个 ICO 文件。

ICO 文件的位置对于我的部署而言并不重要。我尝试编写脚本的根文件夹和子文件夹。

这是我的项目的骨架。任何人都可以提出解决方案吗？也许我们可以使用这个测试平台来记录一个易于确认的测试平台。谢谢！

#Trivial pared-down app GUI for icon troubleshooting
    Add-Type -AssemblyName presentationframework, presentationcore, windowsbase
    #Begin XAML code for GUI
    [xml]$xaml = @"
    <Window
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
            x:Name="Demo_WPF_Window"
            Title="How to change icon at left?" Height="150" Width="320" WindowStyle="SingleBorderWindow" Background="#FFECBD5A" ResizeMode="NoResize"
    >
        <Grid x:Name="Grid">
            <Grid Margin="18,64,0,18">
            <Grid.ColumnDefinitions>
                <ColumnDefinition Width="25*"/>
                <ColumnDefinition Width="126*"/>
                <ColumnDefinition Width="6*"/>
            </Grid.ColumnDefinitions>
        </Grid>
        <Label x:Name="Label_Icon_testbed" Content="Icon is ICO file in same folder as PS1 script" HorizontalAlignment="Left" Height="45" Margin="19,10,0,0" VerticalAlignment="Top" Width="240" FontSize="11" FontWeight="Bold" Grid.ColumnSpan="2"/>
    </Grid>
   </Window>
"@
#Prepare the GUI
    $Reader = New-Object System.Xml.XmlNodeReader $xaml
    $Window = [Windows.Markup.XamlReader]::Load($Reader)
#Render the GUI
    $Window.ShowDialog()

Answer 1

我能够通过在 Window Loaded 事件中设置图标来添加一个图标：

#region Load the Assemblies
Add-Type -assemblyName PresentationFramework
Add-Type -assemblyName PresentationCore
Add-Type -assemblyName WindowsBase
#endregion

#region XAML
[xml]$XAML = @"
<Window
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="Testing" Height="200" Width="300" >

</Window>
"@
#endregion XAML

#Load the XAML and catch a failure
$reader=(New-Object System.Xml.XmlNodeReader $xaml) 
try{$Window=[Windows.Markup.XamlReader]::Load( $reader )}
catch{Write-Host "Unable to load Windows.Markup.XamlReader. Some possible causes for this problem include: .NET Framework is missing PowerShell must be launched with PowerShell -sta, invalid XAML code was encountered."; exit}

##XAML Should have loaded NOW

#Set all "Names" as Variables
$xaml.SelectNodes("//*[@*[contains(translate(name(.),'n','N'),'Name')]]") | ForEach-Object{
    Set-Variable -Name ($_.Name) -Value $Window.FindName($_.Name)
}

#region EVENTS
$Window.add_Loaded({
    $Window.Icon = "C:\Path\to\Icon.ico"
})
#endregion EVENTS


##Show the Window - Wrap ShowDialog in the Async Dispatcher to prevent powershell from crashing on second run
$async = $window.Dispatcher.InvokeAsync({
    $window.ShowDialog() | Out-Null
})
$async.Wait() | Out-Null

Answer 2

这是 Shamus 的有效答案——非常感谢！ -- 与上面的testbed代码底部集成：

$Reader = New-Object System.Xml.XmlNodeReader $xaml

$Window = [Windows.Markup.XamlReader]::Load($Reader)


$Window.add_Loaded({
    $Window.Icon = "C:\full\path\to\favicon.ico"
})

$Window.ShowDialog()