Avalonia | Develop Desktop , Embedded , Mobile and WebAssembly

As the title says. It seems that Avalonia Bitmap requires file path, so the only solution that comes to my mind is saving image, and then displaying it. But it's not exactly what I want to do, I would want to directly display the image from memory.

Iam trying to build an cross platform desktop application using avalonia(.net 6). Actually Iam new to avalonia. I want to shutdown my application explicitly. The default shutdown mode OnLastWindowClose , I want to change it to OnExplicitShutdown. I got a hint that it want to configure in the Application Lifetime at App axaml.cs . But I don't know how to do it. Anyone please help me. Please give me a detailed description about each and every step to configure it.

I am trying to learn some .net6 and c# and I am struggling with regular expressions a lot. More specificaly with Avalonia in Windows if that is relevant. I am trying to do a small app with 2 textboxes. I write text on one and get the text "filtered" in the other one using a value converter. I would like to filter math expressions to try to solve them later on. Something simple, kind of a way of writing text math and getting results real time. I have been trying for several weeks to figure this regular expression on my own with no success whatsoever. I would like to replace in my string "_Expression{BLABLA}" for "BLABLA". For testing my expressions I have been checking in http://regexstorm.net/ and https://regex101.com/ and according to them my matches should be correct (unless I misunderstood the results). But the results in my little app are extremely odd to me and I finally decided to ask for help. Here is my code:

The app is developed by using Avalonia and .net core. I notarized the app and not get any errors. But I got the following error when check the result of the app notarization:

I'm trying to create an Avalonia App which uses several UserControl Views by binding the content in the MainWindow to a property Content in the MainWindowViewModel.(I believe this is standard for MVVM).

I want to be able to handle user inputs such as tapping the screen, pressing buttons etc, while also letting those events to bubble up to the MainWindow so that all inputs from the user can be monitored. This would allow a generic handler which could be simply used update an inactivity timer.

The furthest events seems to be within the same UserControl however I would like to handle the event from the MainWindow. This would mean that everytime a new UserControl is created, the inactivity timer would still function without major changes.

Here is how I'm currently handling tap events on the UserControls:

I am new to Avalonia/ WPF, Xaml and desktop development in general so please forgive and clarify any related misunderstandings I demonstrate. I will continue to study available documentation but I am having a difficult time finding material which addresses the point I am getting stuck on.

I am trying to implement a composition-root, constructor-injection based dependency-injection system in my Avalonia application, using the recommended MVVM pattern and associated Avalonia project template. I have some familiarity with the Microsoft.Extensions.DependencyInjection package so have been trying to work with this system.

Between tutorials for WPF and Avalonia based on this DI framework as well as other frameworks, I have tried to piece together a working solution. I think I have things figured out conceptually as far as registering Services and ViewModels and setting up constructors for these classes appropriately such that the framework will inject dependencies into these classes on instantiation. However, where I am getting stuck is with how to implement constructor injection for View classes.

I attempted to register both MainWindow and MainWindowViewModel as services:

Background:
I am creating an avaloniaUI project and in it I have a json config with a class that serializes and deserializes it on initialization and editing. If the file can't be found on initialization the class makes a new one with a list of default properties. This class is supposed to be the only part of the code that can do that.

Problem:
For some reason the config file, when it does not exist already, is created before the constructor call of the config serializer class. That lead my friends and I to think that the file was being created somewhere else in the project. That can't be the case though because I've used a control f tool to comb the entire project for references of any filestreams, create commands, or a reference to the config path and I found nothing else that's capable of generating a file other than the code that's supposed to create the config but never runs. So what happens is the file is created empty before the code that's supposed to handle generation is called thus skipping the proper generation code which leads to json loading an empty string when the file is deserialized and it creates null value exceptions.

I'm working on a project where I'm creating an AvaloniaUI frontend which would be able to be managed remotely via a REST API. In order to solve this, I created an Avalonia application, then added an additional project to the solution using the 'ASP.NET Core API' template.

I used the following question as a template for setup:

Hosting ASP.NET Core API in a Windows Forms Application

Here they have a similar use case, however with a winforms project rather than Avalonia.

Program.cs:

Startup.cs

When the API project starts async, the server doesn't seem to be running as it refuses the connection. The only way I have been able to get it to respond to get requests has been to set the API project as the startup project (before I had made the changes to Program.cs).

Any help at all will be appreciated, I'm relatively inexperienced when it comes to ASP.NET, so I apologise if this is a relatively simple issue.