Roslyn source generator to create dependency and attached properties for WPF, Xamarin.Forms, and .NET MAUI

Requirements

• Your class should be partial.
• If you create a dependency property (WPF) or bindable property (Xamarin.Forms & .NET MAUI), your class should inherit from System.Windows.DependencyObject or Xamarin.Forms.BindableObject or Microsoft.Maui.Controls.BindableObject according to the project type. Attached properties don't have this requirement.
• Bindables creates the static constructor for the class to initialize the dependency properties. If you have custom static constructor for a type, you can't use Bindables on it.

Example (WPF)

Check Types for Frameworks for other frameworks.

Your Code

using System.Windows;
using Bindables.Wpf;

public partial class YourClass : DependencyObject
{
    private static readonly string DefaultValue = "Test";

    [DependencyProperty(typeof(string))]
    public static readonly DependencyProperty RegularProperty;

    // You can use any visibility modifier.
    [DependencyProperty(typeof(string))]
    private static readonly DependencyPropertyKey ReadOnlyPropertyKey;

    [DependencyProperty(typeof(string), OnPropertyChanged = nameof(PropertyChangedCallback), DefaultValueField = nameof(DefaultValue), Options = FrameworkPropertyMetadataOptions.BindsTwoWayByDefault)]
    public static readonly DependencyProperty CustomizedProperty;

    private static void PropertyChangedCallback(DependencyObject obj, DependencyPropertyChangedEventArgs args)
    {
    }
}

Generated Code

// Generated by Bindables
using System.Windows;

#nullable enable

public partial class YourClass
{
    [global::System.CodeDom.Compiler.GeneratedCode("Bindables.Wpf.WpfPropertyGenerator", "1.4.1")]
    public string? Regular
    {
        get => (string?)GetValue(RegularProperty);
        set => SetValue(RegularProperty, value);
    }

    [global::System.CodeDom.Compiler.GeneratedCode("Bindables.Wpf.WpfPropertyGenerator", "1.4.1")]
    public static readonly DependencyProperty ReadOnlyProperty;

    [global::System.CodeDom.Compiler.GeneratedCode("Bindables.Wpf.WpfPropertyGenerator", "1.4.1")]
    public string? ReadOnly
    {
        get => (string?)GetValue(ReadOnlyProperty);
        private set => SetValue(ReadOnlyPropertyKey, value);
    }

    [global::System.CodeDom.Compiler.GeneratedCode("Bindables.Wpf.WpfPropertyGenerator", "1.4.1")]
    public string? Customized
    {
        get => (string?)GetValue(CustomizedProperty);
        set => SetValue(CustomizedProperty, value);
    }

    [global::System.CodeDom.Compiler.GeneratedCode("Bindables.Wpf.WpfPropertyGenerator", "1.4.1")]
    static YourClass()
    {
        RegularProperty = DependencyProperty.Register(
            nameof(Regular),
            typeof(string),
            typeof(YourClass),
            new FrameworkPropertyMetadata());

        ReadOnlyPropertyKey = DependencyProperty.RegisterReadOnly(
            nameof(ReadOnly),
            typeof(string),
            typeof(YourClass),
            new FrameworkPropertyMetadata());

        ReadOnlyProperty = ReadOnlyPropertyKey.DependencyProperty;

        CustomizedProperty = DependencyProperty.Register(
            nameof(Customized),
            typeof(string),
            typeof(YourClass),
            new FrameworkPropertyMetadata(DefaultValue, (FrameworkPropertyMetadataOptions)256, PropertyChangedCallback));
    }
}

Options

You can pass following options:

Signature of OnPropertyChanged method should be:

Signature of OnCoerceValue method should be:

Types for Frameworks