PropertyBind 0.1.2

PropertyBind

Property synchronization process using Source Generator.

Demo

Assume that the Blog class has a Post class collection, and the Post class has a Blog property.

In this case, you need to write code like the following to synchronize the Blog class without any conflicts.

using System.Collections.ObjectModel;
using System.Collections.Specialized;

public class Blog
{
	public ObservableCollection<Post> Posts { get; } = new();

	public Blog()
	{
		Posts.CollectionChanged += Posts_CollectionChanged;
	}

	private void Posts_CollectionChanged(object? sender, NotifyCollectionChangedEventArgs e)
	{
		if (e.Action == NotifyCollectionChangedAction.Add)
		{
			if (e.NewItems == null) return;
			foreach (Post item in e.NewItems)
			{
				item.Blog = this;
			}
		}
	}
}

public class Post
{
	public Blog Blog { get; set; } = null!;
}

The above code is very tedious. Therefore, by using the SourceGenerator PropertyBind, you can write code with the same meaning as above using attributes.

using System.Collections.ObjectModel;

[GeneratePropertyBind(nameof(Posts), nameof(Post.Blog))]
public partial class Blog
{
	public ObservableCollection<Post> Posts { get; } = new();
}

public class Post
{
	public Blog Blog { get; set; } = null!;
}

Specify the property name of the collection in the first argument.

In the second argument, specify the property name you want to associate with itself.

Note: auto-generated code

GeneratePropertyBindAttribute.cs

namespace PropertyBind
{
    [AttributeUsage(AttributeTargets.Class, AllowMultiple = false, Inherited = false)]
    internal sealed class GeneratePropertyBindAttribute : Attribute
    {
        public string ObservableCollectionPropertyName { get; } 
        public string BindPropertyName { get; } 
        public GeneratePropertyBindAttribute(string observableCollectionPropertyName, string bindPropertyName)
        {
            this.ObservableCollectionPropertyName = observableCollectionPropertyName;
			this.BindPropertyName = bindPropertyName;
        }
    }
}

Blog.g.cs

using System.Collections.Specialized;

public partial class Blog
{
	public Blog()
	{
		Posts.CollectionChanged += Posts_CollectionChanged;
	}

	private void Posts_CollectionChanged(object? sender, NotifyCollectionChangedEventArgs e)
	{
		if (e.Action == NotifyCollectionChangedAction.Add)
		{
			if (e.NewItems == null) return;
			foreach (Post item in e.NewItems)
			{
				item.Blog = this;
			}
		}
	}
}