new FontFamily( "file:///absolutepath#fontname" ) doesn't load TTF

[Red-Rover]

Describe the bug
Loading a font dynamically from the file system doesn't work correctly in a WinUI 3 Desktop application. Loading fonts dynamically using the file:///absolutepath#fontname syntax works in WPF.

Steps to reproduce the bug
Steps to reproduce the behavior:

1. Create a blank project using the "Blank App, Packaged (WinUI Desktop)" Visual Studio Template
2. Add a TextBlock to the to the MainWindow.xaml file with the following properties:

3. In the MainWindow.cs file add the following after InitializeComponent() in the MainWindow() constuctor:

_textBlock.FontFamily = new FontFamily(@"file:///absoluatepath#fontname");

// replace absolutepath with the path to a TTF and fontname with the name of the font.

4. Run the application.

Expected behavior
It should load the font and apply it to the component.

Version Info

NuGet package version:
[Microsoft.WinUI 3.0.0-preview3.201113.0]

Windows app type:

UWP	Win32
	Yes

Windows 10 2004 20262.1010 Windows Feature Experience Pack 120.27510.103230.0

Device form factor	Saw the problem?
Desktop	Yes
Xbox
Surface Hub
IoT

[StephenLPeters]

@MikeHillberg FYI

[chrisglein]

Not a surprising gap given that WinUI3 is coming from the code written to target UWP and not Win32, and in UWP absolute file paths are not so much a thing.

To be clear, this is a mismatch with WPF, not a mismatch between inbox OS XAML and WinUI3?

[github-actions]

This issue is stale because it has been open 180 days with no activity. Remove stale label or comment or this will be closed in 5 days.

[thecco]

So how can I load fontfamily from file path?
I need to publish as a single file. (can't use 'Copy to Output Directory')
I want to use EmbeddedResource, but I can't do this either.

Finally, I wrote the ttf file in AppData folder from EmbeddedResource.
How do I load this now?

[castorix]

Finally, I wrote the ttf file in AppData folder from EmbeddedResource. How do I load this now?

It works with relative path for custom fonts or full path for System fonts
I used it in DWriteCore test to fill the ComboBoxes with fonts ({x:Bind FontFamilyPath} in XAML, pFonts.Add in code)

[PetrMinar]

Hello to all,

I just discovered this old issue while searching for the same thing. And I found an workaround, though a bit limited. Hope it might help you a bit.