ApplicationIcon for WinUI3 Unpackaged version

[qerdinger]

Describe the bug

Hello,

Why doesn't the parameter ApplicationIcon in the .csproj file work as its name suggests with a WinUI3 Unpackaged App ?

MyProj.csproj

<ApplicationIcon>Assets\icon_name.ico</ApplicationIcon>

I have to use a small snippet of code to fix this "bug" :

private void LoadIcon(string iconName)
{
    this.AppWindow.SetIcon(Path.Combine(AppContext.BaseDirectory, $"Assets/{iconName}.ico"));
}

When the LoadIcon function is not called, my application takes the default icon (Win32)

Here’s how it appears on the taskbar:

And here’s how it looks on the window bar:

Am I doing something wrong or is it a bug ?

Thanks
Quentin

Steps to reproduce the bug

1/ Set the ApplicationIcon parameter on the XAML file

<ApplicationIcon>Assets\icon_name.ico</ApplicationIcon>

2/ Run/Launch the application

Here’s how it appears on the taskbar:

And here’s how it looks on the window bar:

Expected behavior

No response

Screenshots

NuGet package version

Windows App SDK 1.6.3: 1.6.250108002

Packaging type

Unpackaged

Windows version

WIN11 10.0.26100.0

IDE

Visual Studio 2022

Additional context

No response

[castorix]

ApplicationIcon is for the executable/Taskbar, not the window caption

[qerdinger]

ApplicationIcon is for the executable/Taskbar, not the window caption

Hi @castorix,
Thanks for your information.
I noticed that ApplicationIcon changes the executable icon, but I initially thought it would also change the taskbar icon.
It seems that the taskbar icon is updated at runtime using the default icon to sync with the window caption.

[ghost1372]

ApplicationIcon is for the executable/Taskbar, not the window caption

Hi @castorix, Thanks for your information. I noticed that ApplicationIcon changes the executable icon, but I initially thought it would also change the taskbar icon. It seems that the taskbar icon is updated at runtime using the default icon to sync with the window caption.

v1.7-exp3 introduced a new API
SetTaskBarIcon/SetTitleBarIcon
We'll have to see if api is added to the next preview version.

[DarranRowe]

Just to add, WM_SETICON should still work.