ReactiveProperty 8.1.2

.NET 6.0 .NET Core 3.1 .NET Standard 2.0 .NET Framework 4.7.2
NuGet\Install-Package ReactiveProperty -Version 8.1.2
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.
dotnet add package ReactiveProperty --version 8.1.2
<PackageReference Include="ReactiveProperty" Version="8.1.2" />
For projects that support PackageReference, copy this XML node into the project file to reference the package.
paket add ReactiveProperty --version 8.1.2
#r "nuget: ReactiveProperty, 8.1.2"
#r directive can be used in F# Interactive, C# scripting and .NET Interactive. Copy this into the interactive tool or source code of the script to reference the package.
// Install ReactiveProperty as a Cake Addin
#addin nuget:?package=ReactiveProperty&version=8.1.2

// Install ReactiveProperty as a Cake Tool
#tool nuget:?package=ReactiveProperty&version=8.1.2

Japanese

ReactiveProperty

ReactiveProperty provides MVVM and asynchronous support features under Reactive Extensions. Target framework is .NET 6.0, .NET Core 3.1, .NET Framework 4.7.2 and .NET Standard 2.0.

Build and Release

ReactiveProperty overview

ReactiveProperty is a very powerful and simple library.

Delay and Select

This sample app's ViewModel code is as below:

public class MainPageViewModel
{
    public ReactiveProperty<string> Input { get; }
    public ReadOnlyReactiveProperty<string> Output { get; }
    public MainPageViewModel()
    {
        Input = new ReactiveProperty<string>("");
        Output = Input
            .Delay(TimeSpan.FromSeconds(1))
            .Select(x => x.ToUpper())
            .ToReadOnlyReactiveProperty();
    }
}

It's LINQ and Rx magic.

All steps are written in the "Getting Started" section in the ReactiveProperty documentation.

This library's concept is "Fun programing". ViewModel code using ReactiveProperties is very simple.

ViewModel's popular implementation:

public class AViewModel : INotifyPropertyChanged
{
    public event PropertyChangedEventHandler PropertyChanged;

    private string _name;
    public string Name
    {
        get => _name;
        set
        {
            _name = value;
            PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(nameof(Name)));

            // Update a command status
            DoSomethingCommand.RaiseCanExecuteChanged();
        }
    }

    private string _memo;
    public string Memo
    {
        get => _memo;
        set
        {
            _memo = value;
            PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(nameof(Memo)));

            // Update a command status
            DoSomethingCommand.RaiseCanExecuteChanged();
        }
    }

    // DelegateCommand is plane ICommand implementation.
    public DelegateCommand DoSomethingCommand { get; }

    public AViewModel()
    {
        DoSomethingCommand = new DelegateCommand(
            () => { ... },
            () => !string.IsNullOrEmpty(Name) && !string.IsNullOrEmpty(Memo)
        );
    }
}

Binding code:

<TextBlock Text="{Binding Name}">
<TextBlock Text="{Binding Memo}">

ViewModel's implementation using ReactiveProperty:

public class AViewModel
{
    public ReactiveProperty<string> Name { get; }
    public ReactiveProperty<string> Memo { get; }
    public ReactiveCommand DoSomethingCommand { get; }

    public AViewModel()
    {
        Name = new ReactiveProperty<string>()
            .SetValidateNotifyError(x => string.IsNullOrEmpty(x) ? "Invalid value" : null);
        Memo = new ReactiveProperty<string>()
            .SetValidateNotifyError(x => string.IsNullOrEmpty(x) ? "Invalid value" : null);
        DoSomethingCommand = new[]
            {
                Name.ObserveHasErrors,
                Memo.ObserveHasErrors,
            }
            .CombineLatestValuesAreAllFalse()
            .ToReactiveCommand()
            .WithSubscribe(() => { ... });
    }
}

Binding code:

<TextBlock Text="{Binding Name.Value}">
<TextBlock Text="{Binding Memo.Value}">

It's very simple.

ReactiveProperty doesn't provide base class by ViewModel, which means that ReactiveProperty can be used together with another MVVM libraries such as Prism, Microsoft.Toolkit.Mvvm and etc.

Documentation

ReactiveProperty documentation

NuGet packages

Package Id Version and downloads Description
ReactiveProperty The package includes all core features, and the target platform is .NET Standard 2.0. It fits almost all situations.
ReactiveProperty.Core The package includes minimum classes such as ReactivePropertySlim<T> and ReadOnlyReactivePropertySlim<T>. And this doesn't have any dependency even System.Reactive. If you don't need Rx features, then it fits.
ReactiveProperty.WPF The package includes EventToReactiveProperty and EventToReactiveCommand for WPF. This is for .NET Core 3.0 or later and .NET Framework 4.7.2 or later.
ReactiveProperty.Blazor The package includes validation support for EditForm component of Blazor with ReactiveProperty validation feature. This is for .NET 6.0 or later.
ReactiveProperty.UWP The package includes EventToReactiveProperty and EventToReactiveCommand for UWP.
ReactiveProperty.XamarinAndroid The package includes many extension methods to create IObservable from events for Xamarin.Android native.
ReactiveProperty.XamariniOS The package includes many extension methods to bind ReactiveProperty and ReactiveCommand to Xamarin.iOS native controls.

Support

I'm not watching StackOverflow and other forums to support ReactiveProperty, so please feel free to post questions at Github issues. I'm available Japanese(1st language) and English(2nd language).

If too many questions are posted, then I plan to separate posting place about feature requests, issues, questions.

Author info

Yoshifumi Kawai a.k.a. @neuecc is Founder/CEO/CTO of Cysharp, Inc in Tokyo, Japan. Awarded Microsoft MVP for Developer Technologies since April, 2011. He is an original owner of ReactiveProperty.

Takaaki Suzuki a.k.a. @xin9le software developer in Fukui, Japan. Awarded Microsoft MVP for Developer Technologies since July, 2012.

Kazuki Ota a.k.a. @okazuki software developer in Tokyo, Japan. Awarded Microsoft MVP for Windows Development since July 2011 to Feb 2017. Now, working at Microsoft Japan.

Product Versions
.NET net5.0 net5.0-windows net6.0 net6.0-android net6.0-ios net6.0-maccatalyst net6.0-macos net6.0-tvos net6.0-windows
.NET Core netcoreapp2.0 netcoreapp2.1 netcoreapp2.2 netcoreapp3.0 netcoreapp3.1
.NET Standard netstandard2.0 netstandard2.1
.NET Framework net461 net462 net463 net47 net471 net472 net48
MonoAndroid monoandroid
MonoMac monomac
MonoTouch monotouch
Tizen tizen40 tizen60
Xamarin.iOS xamarinios
Xamarin.Mac xamarinmac
Xamarin.TVOS xamarintvos
Xamarin.WatchOS xamarinwatchos
Compatible target framework(s)
Additional computed target framework(s)
Learn more about Target Frameworks and .NET Standard.

NuGet packages (17)

Showing the top 5 NuGet packages that depend on ReactiveProperty:

Package Downloads
MessagePack.ReactiveProperty

Extremely Fast MessagePack Serializer for C#(.NET, .NET Core, Unity, Xamarin). Extension support for ReactiveProperty.

ReactiveProperty.WPF

ReactiveProperty.WPF provides behaviors such as EventToReactiveCommand and EventToReactiveProperty.

Rx.Community.Extensions

Community-written extension methods to Rx

ReactiveProperty.XamarinAndroid

ReactiveProperty.XamarinAndroid provides many useful extension methods for Xamarin.Android that can be used with ReactiveProperty.

Reactive.ViewModels

Description

GitHub repositories (16)

Showing the top 5 popular GitHub repositories that depend on ReactiveProperty:

Repository Stars
MathewSachin/Captura
Capture Screen, Audio, Cursor, Mouse Clicks and Keystrokes
neuecc/MessagePack-CSharp
Extremely Fast MessagePack Serializer for C#(.NET, .NET Core, Unity, Xamarin). / msgpack.org[C#]
runceel/ReactiveProperty
ReactiveProperty provides MVVM and asynchronous support features under Reactive Extensions. Target frameworks are .NET 6, .NET Core 3.1, .NET Framework 4.7.2 and .NET Standard 2.0.
danm-de/pcsc-sharp
PC/SC wrapper classes for .NET, written in C#
muak/AiForms.SettingsView
SettingsView for Xamarin.Forms
Version Downloads Last updated
8.1.2 10,139 6/6/2022
8.1.2-pre202206051057 72 6/5/2022
8.1.1 1,999 5/27/2022
8.1.0 2,595 4/30/2022
8.1.0-pre202204290912 81 4/29/2022
8.1.0-pre202204290644 63 4/29/2022
8.0.5 6,983 3/24/2022
8.0.5-pre202203191529 75 3/19/2022
8.0.5-pre202203191312 68 3/19/2022
8.0.4 6,578 3/5/2022
8.0.4-pre202203040658 74 3/4/2022
8.0.3 18,294 12/5/2021
8.0.3-pre202112031043 767 12/3/2021
8.0.3-pre202112030833 729 12/3/2021
8.0.2 3,024 11/21/2021
8.0.1 416 11/20/2021
8.0.1-pre202111200140 471 11/20/2021
8.0.0 4,462 11/9/2021
8.0.0-pre202111090825 145 11/9/2021
8.0.0-pre202110240626 724 10/24/2021
8.0.0-pre202110161410 278 10/16/2021
8.0.0-pre202110160852 159 10/16/2021
8.0.0-pre202110160831 183 10/16/2021
8.0.0-pre202110131323 178 10/13/2021
8.0.0-pre202110071401 214 10/7/2021
8.0.0-pre202110060758 213 10/6/2021
8.0.0-pre202110060735 133 10/6/2021
8.0.0-pre202109190434 311 9/19/2021
8.0.0-pre202109160117 217 9/16/2021
8.0.0-pre202108141424 290 8/14/2021
8.0.0-pre202107040319 694 7/4/2021
7.12.0 21,009 8/6/2021
7.11.0 10,144 5/31/2021
7.10.0 6,731 4/29/2021
7.9.0 8,273 4/20/2021
7.8.3 7,485 3/24/2021
7.8.2 404 3/23/2021
7.8.1 2,473 3/11/2021
7.8.1-pre202103031133 294 3/3/2021
7.8.0 4,927 2/21/2021
7.8.0-pre202102210255 209 2/21/2021
7.8.0-pre202102201703 203 2/20/2021
7.7.1 859 2/19/2021
7.7.1-pre202102190925 220 2/19/2021
7.7.0 8,311 1/26/2021
7.6.1 2,301 1/15/2021
7.6.0 188,867 1/13/2021
7.5.1 23,756 10/19/2020
7.5.0 610 10/17/2020
7.5.0-pre202010141113 309 10/14/2020
7.4.1 13,027 9/23/2020
7.4.0 1,201 9/18/2020
7.3.0 643 9/17/2020
7.2.1 15,326 9/11/2020
7.2.0 34,600 8/4/2020
7.1.0 51,326 5/26/2020
7.1.0-pre202005251107 368 5/25/2020
7.0.1 2,402 5/14/2020
7.0.1-pre202005131606 328 5/13/2020
7.0.0 3,853 5/5/2020
7.0.0-ci20200503102823 358 5/3/2020
7.0.0-ci20200503100450 339 5/3/2020
6.2.0 21,526 1/17/2020
6.1.4 13,958 11/16/2019
6.1.3 16,891 9/26/2019
6.1.2 10,900 8/31/2019
6.0.3 7,651 7/26/2019
5.6.0 85,712 6/20/2019
5.5.1 36,598 5/22/2019
5.4.0 7,311 4/3/2019
5.4.0-pre1 800 4/3/2019
5.3.2 24,931 12/14/2018
5.3.1 1,345 12/13/2018
5.3.0 48,106 9/28/2018
5.2.0 10,978 8/2/2018
5.1.1 4,325 6/21/2018
5.0.0 4,070 6/3/2018
4.2.2 66,008 4/20/2018
4.2.1 4,157 3/17/2018
4.2.0 9,017 1/28/2018
4.1.1 2,280 1/20/2018
4.1.0 1,557 1/18/2018
4.0.1-pre1 1,166 1/14/2018
4.0.0 4,454 1/8/2018
4.0.0-pre5 1,182 1/6/2018
4.0.0-pre4 2,078 10/21/2017
4.0.0-pre3 1,676 6/16/2017
3.6.0 24,746 3/27/2017
3.5.1 19,763 3/3/2017
3.5.0 3,548 2/15/2017
3.4.0 5,083 11/30/2016
3.3.2 2,082 11/21/2016
3.3.1 2,499 11/15/2016
3.2.0 26,087 10/10/2016
3.1.0 1,525 10/7/2016
3.0.1 4,291 8/13/2016
3.0.0 8,175 8/12/2016
3.0.0-pre5 1,269 7/20/2016
3.0.0-pre4 1,340 7/9/2016
3.0.0-pre3 1,237 7/9/2016
3.0.0-pre2 1,183 7/9/2016
3.0.0-pre1 1,339 7/6/2016
2.9.0 9,724 7/20/2016
2.8.0 3,329 7/2/2016
2.7.4 2,040 6/24/2016
2.7.3.1 1,930 6/16/2016
2.7.3 2,242 6/6/2016
2.7.2 4,817 4/23/2016
2.7.1 2,489 4/9/2016
2.7.0 1,324 4/8/2016
2.6.2 1,587 4/2/2016
2.6.1 1,296 4/2/2016
2.6.0 1,583 3/24/2016
2.6.0-beta1 1,708 2/29/2016
2.5.0 5,709 2/7/2016
2.4.2 3,005 1/10/2016
2.4.1 2,251 12/25/2015
2.4.0 1,402 12/23/2015
2.4.0-pre3 1,259 12/23/2015
2.4.0-pre2 1,260 12/23/2015
2.4.0-pre1 1,269 12/22/2015
2.3.1 1,708 12/18/2015
2.3.0.1 2,054 12/4/2015
2.3.0 2,028 12/1/2015
2.3.0-pre4 1,547 11/27/2015
2.3.0-pre3 1,490 11/26/2015
2.3.0-pre2 1,442 11/26/2015
2.3.0-pre 1,466 11/25/2015
2.2.8.1-pre 1,300 11/24/2015
2.2.8 2,080 11/10/2015
2.2.7.1 1,856 10/26/2015
2.2.7 1,323 10/26/2015
2.2.6.1 1,725 10/12/2015
2.2.6 1,416 10/9/2015
2.2.5 2,607 10/1/2015
2.2.4 1,904 9/11/2015
2.2.3.1 2,393 8/28/2015
2.2.3 1,362 8/27/2015
2.2.2 1,990 7/20/2015
2.2.1 1,961 6/28/2015
2.2.0 3,001 4/24/2015
2.1.8.2 1,647 4/2/2015
2.1.8.1 1,565 3/16/2015
2.1.7 1,419 3/14/2015
2.1.6 1,320 3/14/2015
2.1.5 1,350 3/12/2015
2.1.3 1,344 3/10/2015
2.1.2 1,358 3/8/2015
2.1.1 1,341 3/7/2015
2.1.0 1,911 2/25/2015
2.0.1 1,852 2/23/2015
2.0.0 1,681 2/23/2015
2.0.0-pre8 1,662 2/23/2015
2.0.0-pre7 1,669 2/22/2015
2.0.0-pre6 1,644 2/22/2015
2.0.0-pre5 1,662 2/22/2015
2.0.0-pre4 1,566 2/22/2015
2.0.0-pre3 1,580 2/22/2015
2.0.0-pre2 3,497 2/18/2015
2.0.0-pre1 1,571 2/17/2015
1.2.1 1,781 2/21/2015
1.2.0 1,596 2/17/2015
1.1.2 3,392 2/8/2015
1.1.1.2 1,460 2/6/2015
1.1.1.1 2,184 10/19/2014
1.1.1 1,392 10/19/2014
1.1.0 1,643 10/13/2014
1.1.0-beta2 1,262 10/11/2014
1.1.0-beta1 1,254 10/11/2014
1.0.3.1 1,572 10/10/2014
1.0.3 1,585 10/9/2014
1.0.2.2 1,422 10/5/2014
1.0.2 1,469 9/27/2014
1.0.1.1 1,383 9/27/2014
1.0.1 1,409 9/27/2014
1.0.0.2 1,561 9/4/2014
1.0.0.1 1,424 9/4/2014
1.0.0 1,577 9/4/2014
0.4.5.1 1,850 6/3/2014
0.4.5 1,724 5/7/2014
0.4.5-beta3 1,250 5/6/2014
0.4.5-beta2 1,677 5/6/2014
0.4.5-beta1 1,234 5/6/2014
0.4.4.3 1,528 5/4/2014
0.4.4.2 1,581 5/3/2014
0.4.4.1 1,456 5/3/2014
0.4.4 1,422 5/3/2014
0.4.3.1 1,430 4/30/2014
0.4.2.1 1,930 4/12/2014
0.4.2 2,004 4/11/2014
0.4.2-beta5 1,837 4/11/2014
0.4.2-beta4 1,888 4/11/2014
0.4.2-beta3 1,330 4/4/2014
0.4.2-beta2 1,327 4/4/2014
0.4.2-beta1 1,321 4/1/2014
0.4.1 1,510 2/2/2014
0.4.0.1 1,411 12/31/2013
0.4.0-rc1 1,283 12/16/2013
0.3.2 3,287 11/24/2011
0.3.1 1,602 11/21/2011
0.3.0 1,598 11/20/2011
0.2.0 1,814 10/17/2011
0.1.0 1,746 10/6/2011