Running WASM on All Solution Doesn't work in VS

[michael-hawker]

Describe the bug

Related to #306

If I generate the solution and build it in VS, and then run WASM from the commandline:

dotnet run --project tooling\ProjectHeads\AllComponents\Wasm\CommunityToolkit.App.Wasm.csproj

Everything works as expected.

But if I run from VS, it doesn't work, the call to WasmAppHost fails as it's looking at the wrong path:

WasmAppHost --use-staticwebassets --runtime-config I:\code\Labs-Windows\tooling\ProjectHeads\AllComponents\Wasm\bin\Debug\net9.0\CommunityToolkit.App.Wasm.runtimeconfig.json

(Notice the browser-wasm subfolder is missing)

Correct command:

WasmAppHost --use-staticwebassets --runtime-config I:\code\Labs-Windows\tooling\ProjectHeads\AllComponents\Wasm\bin\Debug\net9.0\browser-wasm\CommunityToolkit.App.Wasm.runtimeconfig.json

Steps to reproduce

1. Clone repo
2. GenerateAllSolution.bat
3. Run WASM head in VS

Fails to run

Expected behavior

Run WASM head

Screenshots

No response

Code Platform

• UWP
• WinAppSDK / WinUI 3
• Web Assembly (WASM)
• Android
• iOS
• MacOS
• Linux / GTK

Windows Build Number

• Windows 10 1809 (Build 17763)
• Windows 10 1903 (Build 18362)
• Windows 10 1909 (Build 18363)
• Windows 10 2004 (Build 19041)
• Windows 10 20H2 (Build 19042)
• Windows 10 21H1 (Build 19043)
• Windows 11 21H2 (Build 22000)
• Other (specify)

Other Windows Build number

No response

App minimum and target SDK version

• Windows 10, version 1809 (Build 17763)
• Windows 10, version 1903 (Build 18362)
• Windows 10, version 1909 (Build 18363)
• Windows 10, version 2004 (Build 19041)
• Other (specify)

Other SDK version

No response

Visual Studio Version

2022

Visual Studio Build Number

No response

Device form factor

No response

Additional context

Tried in VS 2026 as well, had a few more issues trying to build there.

Help us help you

No, I'm unable to contribute a solution.

[michael-hawker]

Though still a bit stuck, as even through running on the command line works and allows me to open the app in a page, the Uno Progress bar seems to get stuck at 100% and the full app doesn't load.

FYI @Arlodotexe for when you're back, I was trying to make the improvements in sample-app-wasm-improvements but getting stuck here trying to run and validate. Not sure what broke here again. 🥲

I'll see if I can pull the new PRs updating Uno and if I have any better luck tomorrow.