ReactiveProperty 8.2.0

.NET 6.0 .NET Standard 2.0 .NET Framework 4.7.2
There is a newer prerelease version of this package available.
See the version list below for details.
dotnet add package ReactiveProperty --version 8.2.0
NuGet\Install-Package ReactiveProperty -Version 8.2.0
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="ReactiveProperty" Version="8.2.0" />
For projects that support PackageReference, copy this XML node into the project file to reference the package.
paket add ReactiveProperty --version 8.2.0
#r "nuget: ReactiveProperty, 8.2.0"
#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=8.2.0

// Install ReactiveProperty as a Cake Tool
#tool nuget:?package=ReactiveProperty&version=8.2.0

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 net7.0 net7.0-android net7.0-ios net7.0-maccatalyst net7.0-macos net7.0-tvos net7.0-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 net481
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.

ReactiveProperty.XamarinAndroid

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

Rx.Community.Extensions

Community-written extension methods to Rx

ReactiveProperty.XamariniOS

ReactiveProperty.XamariniOS provides many useful extension methods for .NET for iOS that can be used with ReactiveProperty.

GitHub repositories (17)

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 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
9.0.0-pre202302040959 44 2/4/2023
9.0.0-pre202301080724 124 1/8/2023
9.0.0-pre202301050852 56 1/5/2023
8.2.0 8,561 11/10/2022
8.1.2 20,205 6/6/2022
8.1.2-pre202206051057 89 6/5/2022
8.1.1 2,752 5/27/2022
8.1.0 3,324 4/30/2022
8.1.0-pre202204290912 96 4/29/2022
8.1.0-pre202204290644 81 4/29/2022
8.0.5 9,197 3/24/2022
8.0.5-pre202203191529 91 3/19/2022
8.0.5-pre202203191312 83 3/19/2022
8.0.4 7,721 3/5/2022
8.0.4-pre202203040658 89 3/4/2022
8.0.3 22,565 12/5/2021
8.0.3-pre202112031043 783 12/3/2021
8.0.3-pre202112030833 743 12/3/2021
8.0.2 3,462 11/21/2021
8.0.1 543 11/20/2021
8.0.1-pre202111200140 484 11/20/2021
8.0.0 8,066 11/9/2021
8.0.0-pre202111090825 158 11/9/2021
8.0.0-pre202110240626 859 10/24/2021
8.0.0-pre202110161410 294 10/16/2021
8.0.0-pre202110160852 172 10/16/2021
8.0.0-pre202110160831 196 10/16/2021
8.0.0-pre202110131323 192 10/13/2021
8.0.0-pre202110071401 228 10/7/2021
8.0.0-pre202110060758 227 10/6/2021
8.0.0-pre202110060735 149 10/6/2021
8.0.0-pre202109190434 323 9/19/2021
8.0.0-pre202109160117 233 9/16/2021
8.0.0-pre202108141424 307 8/14/2021
8.0.0-pre202107040319 716 7/4/2021
7.12.0 26,335 8/6/2021
7.11.0 11,181 5/31/2021
7.10.0 7,128 4/29/2021
7.9.0 9,007 4/20/2021
7.8.3 8,051 3/24/2021
7.8.2 532 3/23/2021
7.8.1 2,807 3/11/2021
7.8.1-pre202103031133 307 3/3/2021
7.8.0 5,249 2/21/2021
7.8.0-pre202102210255 221 2/21/2021
7.8.0-pre202102201703 216 2/20/2021
7.7.1 1,031 2/19/2021
7.7.1-pre202102190925 232 2/19/2021
7.7.0 9,081 1/26/2021
7.6.1 2,721 1/15/2021
7.6.0 222,150 1/13/2021
7.5.1 27,913 10/19/2020
7.5.0 750 10/17/2020
7.5.0-pre202010141113 322 10/14/2020
7.4.1 14,723 9/23/2020
7.4.0 1,348 9/18/2020
7.3.0 811 9/17/2020
7.2.1 17,520 9/11/2020
7.2.0 38,767 8/4/2020
7.1.0 53,425 5/26/2020
7.1.0-pre202005251107 381 5/25/2020
7.0.1 2,684 5/14/2020
7.0.1-pre202005131606 341 5/13/2020
7.0.0 4,061 5/5/2020
7.0.0-ci20200503102823 373 5/3/2020
7.0.0-ci20200503100450 355 5/3/2020
6.2.0 22,325 1/17/2020
6.1.4 14,268 11/16/2019
6.1.3 17,660 9/26/2019
6.1.2 11,035 8/31/2019
6.0.3 7,971 7/26/2019
5.6.0 86,141 6/20/2019
5.5.1 39,012 5/22/2019
5.4.0 7,531 4/3/2019
5.4.0-pre1 818 4/3/2019
5.3.2 25,718 12/14/2018
5.3.1 1,450 12/13/2018
5.3.0 49,885 9/28/2018
5.2.0 11,229 8/2/2018
5.1.1 4,537 6/21/2018
5.0.0 4,209 6/3/2018
4.2.2 75,122 4/20/2018
4.2.1 4,310 3/17/2018
4.2.0 9,179 1/28/2018
4.1.1 2,393 1/20/2018
4.1.0 1,667 1/18/2018
4.0.1-pre1 1,189 1/14/2018
4.0.0 4,637 1/8/2018
4.0.0-pre5 1,206 1/6/2018
4.0.0-pre4 2,101 10/21/2017
4.0.0-pre3 1,702 6/16/2017
3.6.0 25,566 3/27/2017
3.5.1 22,849 3/3/2017
3.5.0 3,925 2/15/2017
3.4.0 5,209 11/30/2016
3.3.2 2,192 11/21/2016
3.3.1 2,758 11/15/2016
3.2.0 29,679 10/10/2016
3.1.0 1,641 10/7/2016
3.0.1 4,440 8/13/2016
3.0.0 8,291 8/12/2016
3.0.0-pre5 1,294 7/20/2016
3.0.0-pre4 1,365 7/9/2016
3.0.0-pre3 1,264 7/9/2016
3.0.0-pre2 1,210 7/9/2016
3.0.0-pre1 1,365 7/6/2016
2.9.0 10,118 7/20/2016
2.8.0 3,511 7/2/2016
2.7.4 2,152 6/24/2016
2.7.3.1 2,041 6/16/2016
2.7.3 2,360 6/6/2016
2.7.2 5,036 4/23/2016
2.7.1 2,903 4/9/2016
2.7.0 1,436 4/8/2016
2.6.2 1,700 4/2/2016
2.6.1 1,409 4/2/2016
2.6.0 1,695 3/24/2016
2.6.0-beta1 1,736 2/29/2016
2.5.0 5,848 2/7/2016
2.4.2 3,116 1/10/2016
2.4.1 2,365 12/25/2015
2.4.0 1,513 12/23/2015
2.4.0-pre3 1,285 12/23/2015
2.4.0-pre2 1,287 12/23/2015
2.4.0-pre1 1,296 12/22/2015
2.3.1 1,834 12/18/2015
2.3.0.1 2,177 12/4/2015
2.3.0 2,150 12/1/2015
2.3.0-pre4 1,585 11/27/2015
2.3.0-pre3 1,528 11/26/2015
2.3.0-pre2 1,481 11/26/2015
2.3.0-pre 1,505 11/25/2015
2.2.8.1-pre 1,326 11/24/2015
2.2.8 2,195 11/10/2015
2.2.7.1 1,971 10/26/2015
2.2.7 1,436 10/26/2015
2.2.6.1 1,840 10/12/2015
2.2.6 1,527 10/9/2015
2.2.5 2,720 10/1/2015
2.2.4 2,016 9/11/2015
2.2.3.1 2,507 8/28/2015
2.2.3 1,473 8/27/2015
2.2.2 2,105 7/20/2015
2.2.1 2,074 6/28/2015
2.2.0 3,115 4/24/2015
2.1.8.2 1,763 4/2/2015
2.1.8.1 1,676 3/16/2015
2.1.7 1,532 3/14/2015
2.1.6 1,432 3/14/2015
2.1.5 1,463 3/12/2015
2.1.3 1,457 3/10/2015
2.1.2 1,469 3/8/2015
2.1.1 1,452 3/7/2015
2.1.0 2,025 2/25/2015
2.0.1 1,962 2/23/2015
2.0.0 1,794 2/23/2015
2.0.0-pre8 1,689 2/23/2015
2.0.0-pre7 1,696 2/22/2015
2.0.0-pre6 1,672 2/22/2015
2.0.0-pre5 1,691 2/22/2015
2.0.0-pre4 1,592 2/22/2015
2.0.0-pre3 1,605 2/22/2015
2.0.0-pre2 3,531 2/18/2015
2.0.0-pre1 1,600 2/17/2015
1.2.1 1,899 2/21/2015
1.2.0 1,709 2/17/2015
1.1.2 3,755 2/8/2015
1.1.1.2 1,575 2/6/2015
1.1.1.1 2,299 10/19/2014
1.1.1 1,505 10/19/2014
1.1.0 1,758 10/13/2014
1.1.0-beta2 1,289 10/11/2014
1.1.0-beta1 1,280 10/11/2014
1.0.3.1 1,684 10/10/2014
1.0.3 1,700 10/9/2014
1.0.2.2 1,532 10/5/2014
1.0.2 1,584 9/27/2014
1.0.1.1 1,497 9/27/2014
1.0.1 1,522 9/27/2014
1.0.0.2 1,674 9/4/2014
1.0.0.1 1,540 9/4/2014
1.0.0 1,693 9/4/2014
0.4.5.1 1,964 6/3/2014
0.4.5 1,839 5/7/2014
0.4.5-beta3 1,279 5/6/2014
0.4.5-beta2 1,723 5/6/2014
0.4.5-beta1 1,262 5/6/2014
0.4.4.3 1,635 5/4/2014
0.4.4.2 1,694 5/3/2014
0.4.4.1 1,568 5/3/2014
0.4.4 1,537 5/3/2014
0.4.3.1 1,545 4/30/2014
0.4.2.1 2,043 4/12/2014
0.4.2 2,132 4/11/2014
0.4.2-beta5 1,880 4/11/2014
0.4.2-beta4 1,933 4/11/2014
0.4.2-beta3 1,358 4/4/2014
0.4.2-beta2 1,355 4/4/2014
0.4.2-beta1 1,346 4/1/2014
0.4.1 1,628 2/2/2014
0.4.0.1 1,529 12/31/2013
0.4.0-rc1 1,315 12/16/2013
0.3.2 3,427 11/24/2011
0.3.1 1,728 11/21/2011
0.3.0 1,720 11/20/2011
0.2.0 1,936 10/17/2011
0.1.0 1,875 10/6/2011