Function behind Button not getting executed

[SirZeeno]

<Button Grid.Column="1" x:DataType="importWindow:ImportWindow" Command="{Binding AddPathToQueue}" CommandParameter="{Binding ElementName=PathTextBox}">
                <StackPanel Orientation="Horizontal">
                    <ui:SymbolIcon Symbol="Add" FontSize="20" Foreground="White" HorizontalAlignment="Center"/>
                    <TextBlock Text="Add Path"/>
                </StackPanel>
            </Button>

public void AddPathToQueue(TextBox textBox)
    {
        ConsoleExt.WriteLineWithPretext("Added Path", ConsoleExt.OutputType.Info);
    }

I am trying to execute the function with the press of a button, and this way of executing worked for me before, the only different thing is that I am setting the data type for the button itself since the rest of the axaml relies on a different datatype. What I am expecting is a console output of "Added Path" but nothing is happening when I press the button.

To clarify, all the references in terms of bindings and data type are current and link up in my IDE and don't produce any compile errors or any errors when the button is pressed and this all takes place in a window that gets created when a button is pressed. All it produces is absolutely nothing, so any help is greatly appreciated in this. :)

[timunie]

I highly suggest to follow the MVVM pattern and use Commands in the ViewModel. Typically you do not pass View-items to the Command, but the containing text. Sample:
https://github.com/AvaloniaUI/Avalonia.Samples/tree/main/src/Avalonia.Samples/MVVM/CommandSample

[SirZeeno]

The button is greyed out even with the CanExecute removed, but the command is declared as specified by the sample

AddPathToQueueCommand = ReactiveCommand.Create<string?>(path => AddPathToQueue(path));

even the IDE is telling me that the AddPathToQueueCommand is being used by the axaml binding and when I set it to the ReactiveCommand.Create function.

[thevortexcloud]

My next guess is you are binding to the wrong thing or your datacontext is null. Are you binding to a list of items by any chance? Have you checked if your view model constructor is actually being called?

You should be able to check the data context using the dev tools.

[SirZeeno]

the command and parameter in the f12 are null even though I am declaring them in the "public MainViewModel()" function, which should execute right away when the class gets called, shouldn't it?

[thevortexcloud]

A constructor will be called whenever the class is instantiated. If it's not being instantiated it wont be called. You can prove that the constructor is being called by putting a break point inside it with your IDE and seeing if it gets hit.

Avalonia generally does not try to instantiate your view models for you. You need to that yourself somehow (and in some cases explicitly set the view model as the data context for your view). The main window's view model is typically set in the App.axaml.cs file. Like this:

    public override void OnFrameworkInitializationCompleted() {
        if (ApplicationLifetime is IClassicDesktopStyleApplicationLifetime desktop) {
            desktop.MainWindow = new MainWindow {
                DataContext = new MainWindowViewModel(),
            };
        }

        base.OnFrameworkInitializationCompleted();
    }

Child/other views can be created by instantiating view models and using a view locator to work out what view to load. Or you can just manually set it all up in your view's code behind. There are many ways to structure it.

Without seeing more of your code it's hard to say what is going on here.

[SirZeeno]

Thank you, i just needed to set the Datacontext inside the creation of the window, which I didn't know you had to do.

[thevortexcloud]

You are welcome. I suggest you look into how the view locator works, which will auto create your views and assign the datacontext for you.

https://docs.avaloniaui.net/docs/concepts/view-locator