debug GetStartedApp with error of file not found

[cd-willi]

Hi, folks. I am new hand. I encounter a problem while debugging TestStartedApp using Visual Studio 2022 Communite:
The type initializer for 'Avalonia.Diagnostics.Conventions' threw an exception.
Source=Avalonia.Diagnostics
StackTrace:
at Avalonia.Diagnostics.Conventions.get_DefaultScreenshotHandler()
at Avalonia.Diagnostics.DevToolsOptions..ctor()
at Avalonia.DevToolsExtensions.AttachDevTools(TopLevel root)
at GetStartedApp.Views.MainWindow.InitializeComponent(Boolean loadXaml, Boolean attachDevTools) in C:\projects\2023\c#\avalonia\GetStartedApp\GetStartedApp\Avalonia.Generators\Avalonia.Generators.NameGenerator.AvaloniaNameSourceGenerator\GetStartedApp.Views.MainWindow.g.cs:line 29
at GetStartedApp.Views.MainWindow..ctor() in C:\projects\2023\c#\avalonia\GetStartedApp\GetStartedApp\Views\MainWindow.axaml.cs:line 9
at GetStartedApp.App.OnFrameworkInitializationCompleted() in C:\projects\2023\c#\avalonia\GetStartedApp\GetStartedApp\App.axaml.cs:line 21
at Avalonia.AppBuilder.SetupUnsafe()
at Avalonia.AppBuilder.Setup()
at Avalonia.AppBuilder.SetupWithLifetime(IApplicationLifetime lifetime)
at Avalonia.ClassicDesktopStyleApplicationLifetimeExtensions.StartWithClassicDesktopLifetime(AppBuilder builder, String[] args, ShutdownMode shutdownMode)
at GetStartedApp.Desktop.Program.Main(String[] args) in C:\projects\2023\c#\avalonia\GetStartedApp\GetStartedApp.Desktop\Program.cs:line 14

This exception was originally thrown at this call stack:
[External Code]

Inner Exception 1:
FileNotFoundException: Could not find file 'C:\Users\myname\OneDrive\image\Screenshots'.

[cd-willi]

Why the first app 'Welcome to Avalonia!' trys to access a subdir of my onedrive folder which actually not exists.

[cd-willi]

My first date with Avalonia was pinned with doubt of security concern?

[jp2masa]

You can look at the source, here:

Avalonia/src/Avalonia.Diagnostics/Diagnostics/Conventions.cs

Lines 8 to 17 in 4a30a54

	public static string DefaultScreenshotsRoot
	{
	get
	{
	var dir = System.IO.Path.Combine(
	Environment.GetFolderPath(Environment.SpecialFolder.MyPictures), "Screenshots");
	Directory.CreateDirectory(dir);
	return dir;
	}
	}

So, that path is returned by Environment.GetFolderPath(Environment.SpecialFolder.MyPictures). The .NET docs specify that the return value is:

The path to the specified system special folder, if that folder physically exists on your computer; otherwise, an empty string ("").

A folder will not physically exist if the operating system did not create it, the existing folder was deleted, or the folder is a virtual directory, such as My Computer, which does not correspond to a physical path.

So, that folder should exist.

[thevortexcloud]

Which sample are you trying to run? As far as I am aware the default app created by the template does not take any screenshots.

[cd-willi]

I follow the guide from https://docs.avaloniaui.net/docs/get-started/test-drive/create-a-project, and create the app using the command: dotnet new avalonia.app -o GetStartedApp.

[cd-willi]

My OS is Windows 11 version 22H2. I have installed Visual Studio 2022 17.8.0 and extensions Avalonia Toolkit, Avalonia Template Studio and Avalonia for Visual Studio 2022. I created this first Avalonia app following guide and didn't make any editing, and then encountered the problem described above while running it in debug mode.

[thevortexcloud]

Sounds like it's just an issue with the diagnostics package. By default it only runs on debug builds. You could of course just remove the package to disable it entirely. But you do lose access to useful things like the inspector if you do that.

[cd-willi]

@jp2masa， this line of code Directory.CreateDirectory(dir) might not work correctly, since I solved the problem by manually creating the subdir.