KoKo 2.2.0

There is a newer prerelease version of this package available.
See the version list below for details.
dotnet add package KoKo --version 2.2.0                
NuGet\Install-Package KoKo -Version 2.2.0                
This command is intended to be used within the Package Manager Console in Visual Studio, as it uses the NuGet module's version of Install-Package.
<PackageReference Include="KoKo" Version="2.2.0" />                
For projects that support PackageReference, copy this XML node into the project file to reference the package.
paket add KoKo --version 2.2.0                
#r "nuget: KoKo, 2.2.0"                
#r directive can be used in F# Interactive and Polyglot Notebooks. Copy this into the interactive tool or source code of the script to reference the package.
// Install KoKo as a Cake Addin
#addin nuget:?package=KoKo&version=2.2.0

// Install KoKo as a Cake Tool
#tool nuget:?package=KoKo&version=2.2.0                

Full documentation on GitHub

Nuget GitHub Workflow Status Coveralls

Knockout for Cocoa, for C#

KoKo lets you create Property objects as members of your model classes.

Unlike native C# properties, KoKo Property objects automatically fire change events. They can be composed from multiple other Properties without the dependencies being aware of the dependents, and without writing any boilerplate event handling code. They are compatible with native C# properties and events, as well as with WPF and Windows Forms databinding.

These properties are very similar to what you would find in Knockout, MobX, and WPF's DependencyProperty. They do not rely on a presentation layer like WPF, and they do not require you to import and understand a large, overblown, confusing library like .NET Reactive Extensions/Rx.NET.

This library was ported from a Swift library by @abrindam called KoKo ("Knockout for Cocoa"), which was later open-sourced under the name Yoyo.

Requirements

  • Any of the following runtimes
    • .NET Core 2.0 or later, including .NET 5 or later
    • .NET Framework 4.6.2 or later
    • Any other runtime that supports .NET Standard 2.0 or later

Usage

  1. Create a class to act as your business or view model.
  2. Import the KoKo.Property namespace.
  3. Add some Property fields, one for each piece of data you want to represent.
  4. Get and set their Value.

Example

This is a just a silly, simple example. Don't actually represent people's names this way.

using KoKo.Property;

namespace MyProject {

    public class Person {

        private StoredProperty<string> FirstName { get; }
        private StoredProperty<string> LastName { get; }
        public Property<string> FullName { get; }

        public Person(string firstName, string lastName) {
            FirstName = new StoredProperty<string>(firstName);
            LastName = new StoredProperty<string>(lastName);
            FullName = DerivedProperty<string>.Create(FirstName, LastName, (first, last) => $"{first} {last}");
        }

        public void SetFirstName(string firstName) {
            FirstName.Value = firstName;
        }

    }
}
Programmatic access

Now you can get a person object's autogenerated full name,

var person = new Person("Alice", "Smith");
Console.WriteLine(person.FullName.Value); // Alice Smith

and if you change a dependency value, the dependent full name will be automatically updated.

person.SetFirstName("Bob");
Console.WriteLine(person.FullName.Value); // Bob Smith
Data-bound access

You can also use Properties with databinding in WPF and Windows Forms:

<Label Content="{Binding FullName.Value}" />
private void Form1_Load(object sender, System.EventArgs e) {
    personNameLabel.DataBindings.Add("Text", model.FullName, "Value");
}

Remember to use the Value property in your databinding declarations, otherwise you won't get the property's value.

Full documentation on GitHub

Product Compatible and additional computed target framework versions.
.NET net5.0 was computed.  net5.0-windows was computed.  net6.0 was computed.  net6.0-android was computed.  net6.0-ios was computed.  net6.0-maccatalyst was computed.  net6.0-macos was computed.  net6.0-tvos was computed.  net6.0-windows was computed.  net7.0 was computed.  net7.0-android was computed.  net7.0-ios was computed.  net7.0-maccatalyst was computed.  net7.0-macos was computed.  net7.0-tvos was computed.  net7.0-windows was computed.  net8.0 was computed.  net8.0-android was computed.  net8.0-browser was computed.  net8.0-ios was computed.  net8.0-maccatalyst was computed.  net8.0-macos was computed.  net8.0-tvos was computed.  net8.0-windows was computed. 
.NET Core netcoreapp2.0 was computed.  netcoreapp2.1 was computed.  netcoreapp2.2 was computed.  netcoreapp3.0 was computed.  netcoreapp3.1 was computed. 
.NET Standard netstandard2.0 is compatible.  netstandard2.1 is compatible. 
.NET Framework net461 was computed.  net462 is compatible.  net463 was computed.  net47 was computed.  net471 was computed.  net472 was computed.  net48 was computed.  net481 was computed. 
MonoAndroid monoandroid was computed. 
MonoMac monomac was computed. 
MonoTouch monotouch was computed. 
Tizen tizen40 was computed.  tizen60 was computed. 
Xamarin.iOS xamarinios was computed. 
Xamarin.Mac xamarinmac was computed. 
Xamarin.TVOS xamarintvos was computed. 
Xamarin.WatchOS xamarinwatchos was computed. 
Compatible target framework(s)
Included target framework(s) (in package)
Learn more about Target Frameworks and .NET Standard.
  • .NETFramework 4.6.2

    • No dependencies.
  • .NETStandard 2.0

    • No dependencies.
  • .NETStandard 2.1

    • No dependencies.

NuGet packages (2)

Showing the top 2 NuGet packages that depend on KoKo:

Package Downloads
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Send and receive events with a Behringer X-Touch Extender DAW MIDI control surface over USB.

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GitHub repositories

This package is not used by any popular GitHub repositories.

Version Downloads Last updated
2.3.0-beta1 139 8/19/2024
2.2.0 1,043 10/7/2022
2.1.0 6,067 11/24/2021
2.0.3 514 10/11/2020
2.0.2 496 6/9/2020
2.0.1 419 6/9/2020
1.0.0 1,089 5/15/2018