BetterDP 1.0.0

BetterDP

Simpler declaration for WPF Dependency Properties

About

Dependency Properties are a neat feature of WPF, allowing powerful data binding mechanisms.

However, declaring custom properties is not really straightforward and leads to a lot of boilerplate code.
As an example:

using System.Windows;

public class Foo: DependencyObject
{
    public static readonly DependencyProperty BarProperty = DependencyProperty.Register
    (
        "Bar",
        typeof( string ),
        typeof( Foo ),
        new PropertyMetadata()
    );

    public string Bar
    {
        get => this.GetValue( BarProperty ) as string;
        set => this.SetValue( BarProperty, value );
    }
}

This package provides a way to reduce the amount of code needed to declare such a property, by introducing a custom [DP] attribute.
The new syntax is then:

using System.Windows;
using BetterDP;

public class Foo: DependencyObject
{
    [DP]
    public string Bar
    {
        get => this.Get< string >();
        set => this.Set( value );
    }
}

Default values

A default value can be provided directly within the [DP] attribute, such as:

[DP( DefaultValue = "hello, world" )]
public string Bar
{
    get => this.Get< string >();
    set => this.Set( value );
}

This is the equivalent of setting a default value with PropertyMetadata or FrameworkPropertyMetadata.

Change Handlers

In order to be notified when a property has changed, you may implement the following method in your class:

protected virtual void DependencyPropertyDidChange( string name, object value )
{}

It will automatically be called when a property marked with [DP] has changed.

License

BetterDP is released under the terms of the MIT License.

Repository Infos

Owner:          DigiDNA
Web:            www.digidna.net
Blog:           imazing.com/blog
Twitter:        @DigiDNA
GitHub:         github.com/DigiDNA