wpf - 使用Powershell的Add-type编译WPF Xaml，而不使用PowerBoots

Question

我想在XAML中嵌入WPF代码，然后使用powershell add-type进行编译。
有PowerBoots，但我不想使用它。我要嵌入的代码是here。我提到了实现的The PowershellGuy way，但仍然需要使用文件后面的代码。

Add-Type -AssemblyName presentationframework
[xml]$xaml = @' 
<Window 
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
Title="Window1"  Height="350" Width="525" AllowsTransparency="True"  
WindowStyle="None" 
WindowState="Maximized" Topmost="False"  IsHitTestVisible="False">
</Window> 
'@ 

$reader=(New-Object Xml.XmlNodeReader $xaml) 
$Form=[Windows.Markup.XamlReader]::Load( $reader ) 
$Form.ShowDialog() | out-null

链接中的代码背后的代码是

protected override void OnRender(DrawingContext drawingContext)
{ 
   base.OnRender(drawingContext); 
   var screenGeometry = new RectangleGeometry(new Rect(0, 0, ActualWidth,   ActualHeight)); 
   var excludeRectangle = new RectangleGeometry(new Rect(200, 200, 150, 150)); 
   drawingContext.PushClip(CombinedGeometry.Combine(screenGeometry, excludeRectangle, GeometryCombineMode.Exclude, null)); 
   drawingContext.PushOpacity(.8);
   drawingContext.DrawRectangle(Brushes.Black, null, new Rect(0, 0, ActualWidth, ActualHeight));
   drawingContext.Pop(); drawingContext.Pop(); 
    } 

谢谢!

Answer 1

您无法在通过XamlReader加载的XAML上保留任何代码，这基本上意味着您无法做您想做的事情(在宽松的XAML中覆盖Window的OnRender方法)而不创建新的派生类型从Window类...

但这对您想做的事情来说太过分了，我认为:

Add-Type -AssemblyName presentationframework
[xml]$xaml = @' 
<Window 
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
AllowsTransparency="True" WindowStyle="None" 
Background="#AA000000" WindowState="Maximized" 
Height="{x:Static SystemParameters.PrimaryScreenHeight}"
Width="{x:Static SystemParameters.PrimaryScreenWidth}" 
Title="Window Title" Topmost="False"  IsHitTestVisible="False"></Window> 
'@ 

$reader=(New-Object Xml.XmlNodeReader $xaml) 
$Form=[Windows.Markup.XamlReader]::Load( $reader ) 
$Form.ShowDialog() | out-null