C#•11mo ago

Blazor "auto-bindable" property source generator

anyone know lib that can auto generate required event and property? For example:

  [BindableParameter]
  public bool Visible { get; set; }

  [BindableParameter]
  public bool Visible { get; set; }

Auto generate into:

    private bool _visible;

    [Parameter]
    public bool Visible
    {
        get => _visible;
        set
        {
            if (_visible == value) return;

            _visible = value;
            VisibleChanged.InvokeAsync(value);
        }
    }
    [Parameter]
    public EventCallback<bool> VisibleChanged { get; set; }

    private bool _visible;

    [Parameter]
    public bool Visible
    {
        get => _visible;
        set
        {
            if (_visible == value) return;

            _visible = value;
            VisibleChanged.InvokeAsync(value);
        }
    }
    [Parameter]
    public EventCallback<bool> VisibleChanged { get; set; }

???

8 Replies

Thinker•11mo ago

You would have to put the attribute on a field instead.

[BindableParameter]
private bool _visible;

[BindableParameter]
private bool _visible;

You can't replace code so you wouldn't be able to transform public bool Visible { get; set; } into something else wait nvm

CrosRoad95OP•11mo ago

hmm it's fine, but do you know lib that can do it for me? As you can see, it is a lot of boilerplate

Thinker•11mo ago

You could try CommunityToolkit.Mvvm

Pobiega•11mo ago

CommunityToolkit.Mvvm does exactly this, I believe the attribute is called ObservableProperty https://learn.microsoft.com/en-us/dotnet/communitytoolkit/mvvm/generators/overview

public string? Name
{
    get => name;
    set
    {
        if (!EqualityComparer<string?>.Default.Equals(name, value))
        {
            string? oldValue = name;
            OnNameChanging(value);
            OnNameChanging(oldValue, value);
            OnPropertyChanging();
            name = value;
            OnNameChanged(value);
            OnNameChanged(oldValue, value);
            OnPropertyChanged();
        }
    }
}

partial void OnNameChanging(string? value);
partial void OnNameChanged(string? value);

partial void OnNameChanging(string? oldValue, string? newValue);
partial void OnNameChanged(string? oldValue, string? newValue);

public string? Name
{
    get => name;
    set
    {
        if (!EqualityComparer<string?>.Default.Equals(name, value))
        {
            string? oldValue = name;
            OnNameChanging(value);
            OnNameChanging(oldValue, value);
            OnPropertyChanging();
            name = value;
            OnNameChanged(value);
            OnNameChanged(oldValue, value);
            OnPropertyChanged();
        }
    }
}

partial void OnNameChanging(string? value);
partial void OnNameChanged(string? value);

partial void OnNameChanging(string? oldValue, string? newValue);
partial void OnNameChanged(string? oldValue, string? newValue);

this is what it generates for

[ObservableProperty]
private string? name;

[ObservableProperty]
private string? name;

CrosRoad95OP•11mo ago

let's code it myself

CrosRoad95OP•11mo ago

Should not be that hard

CrosRoad95OP•11mo ago

Pobiega•11mo ago

Look up how the mvvm lib is written, it's open source.

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Blazor "auto-bindable" property source generator