ReactiveProperty 9.4.1

dotnet add package ReactiveProperty --version 9.4.1
NuGet\Install-Package ReactiveProperty -Version 9.4.1
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="9.4.1" />
For projects that support PackageReference, copy this XML node into the project file to reference the package.
paket add ReactiveProperty --version 9.4.1
#r "nuget: ReactiveProperty, 9.4.1"
#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 ReactiveProperty as a Cake Addin
#addin nuget:?package=ReactiveProperty&version=9.4.1

// Install ReactiveProperty as a Cake Tool
#tool nuget:?package=ReactiveProperty&version=9.4.1

Japanese

ReactiveProperty

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

alternate text is missing from this package README image alternate text is missing from this package README image 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 ReactivePropertySlim<string> Input { get; }
    public ReadOnlyReactivePropertySlim<string> Output { get; }
    public MainPageViewModel()
    {
        Input = new ReactivePropertySlim<string>("");
        Output = Input
            .Delay(TimeSpan.FromSeconds(1))
            .Select(x => x.ToUpper())
            .ObserveOnDispatcher()
            .ToReadOnlyReactivePropertySlim();
    }
}

It is really simple and understandable (I think!). Because there are NOT any base classes and interfaces. Just has declarative code between Input property and Output property.

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

The concept of ReactiveProperty is simple that is a core class what name is ReactiveProperty[Slim], it is just a wrap class what has a value, and implements IObservable<T> and INotifyPropertyChanged, IObservable<T> is for connect change event of the property value to Rx LINQ method chane, INotifyPropertyChanged is for data binding system such as WPF, WinUI and MAUI.

And an important concept of ReactiveProperty is "Fun programing". ViewModel code with ReactiveProperty 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 ValidatableReactiveProperty<string> Name { get; }
    public ValidatableReactiveProperty<string> Memo { get; }
    public ReactiveCommandSlim DoSomethingCommand { get; }

    public AViewModel()
    {
        Name = new ValidatableReactiveProperty<string>("", 
            x => string.IsNullOrEmpty(x) ? "Invalid value" : null);
        Memo = new ValidatableReactiveProperty<string>("",
            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 alternate text is missing from this package README imagealternate text is missing from this package README image The package includes all core features.
ReactiveProperty.Core alternate text is missing from this package README imagealternate text is missing from this package README image 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 alternate text is missing from this package README imagealternate text is missing from this package README image The package includes EventToReactiveProperty and EventToReactiveCommand for WPF. This is for .NET 6 or later and .NET Framework 4.7.2 or later.
ReactiveProperty.Blazor alternate text is missing from this package README imagealternate text is missing from this package README image The package includes validation support for EditForm component of Blazor with ReactiveProperty validation feature. This is for .NET 6.0 or later.

Following packages are maitanance phase.

Package Id Version and downloads Description
ReactiveProperty.UWP alternate text is missing from this package README imagealternate text is missing from this package README image The package includes EventToReactiveProperty and EventToReactiveCommand for UWP.
ReactiveProperty.XamarinAndroid alternate text is missing from this package README imagealternate text is missing from this package README image The package includes many extension methods to create IObservable from events for Xamarin.Android native.
ReactiveProperty.XamariniOS alternate text is missing from this package README imagealternate text is missing from this package README image 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 Compatible and additional computed target framework versions.
.NET net5.0 was computed.  net5.0-windows was computed.  net6.0 is compatible.  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 is compatible.  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 is compatible.  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 was computed. 
.NET Framework net461 was computed.  net462 was computed.  net463 was computed.  net47 was computed.  net471 was computed.  net472 is compatible.  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)
Additional computed target framework(s)
Learn more about Target Frameworks and .NET Standard.

NuGet packages (19)

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.

ReactiveProperty.XamariniOS

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

Rx.Community.Extensions

Community-written extension methods to Rx

GitHub repositories (19)

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

Repository Stars
MathewSachin/Captura
Capture Screen, Audio, Cursor, Mouse Clicks and Keystrokes
MessagePack-CSharp/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
9.4.1 1,656 2/12/2024
9.4.0 233 2/11/2024
9.4.0-pre8 447 12/21/2023
9.4.0-pre7 228 12/21/2023
9.4.0-pre6 211 12/21/2023
9.4.0-pre5 222 12/21/2023
9.4.0-pre4 230 12/21/2023
9.3.4 14,176 10/30/2023
9.3.4-pre202310290551 285 10/29/2023
9.3.3 2,423 10/10/2023
9.3.2 4,161 9/25/2023
9.3.2-pre202309140728 398 9/14/2023
9.3.1 11,307 8/11/2023
9.3.0 2,543 7/31/2023
9.3.0-pre202307291429 529 7/29/2023
9.2.0 8,152 6/19/2023
9.2.0-pre202305241301 576 5/25/2023
9.1.2 20,094 3/12/2023
9.0.0 8,312 2/12/2023
9.0.0-pre202302040959 548 2/4/2023
9.0.0-pre202301080724 621 1/8/2023
9.0.0-pre202301050852 534 1/5/2023
8.2.0 28,108 11/10/2022
8.1.2 38,900 6/6/2022
8.1.2-pre202206051057 537 6/5/2022
8.1.1 4,107 5/27/2022
8.1.0 4,644 4/30/2022
8.1.0-pre202204290912 570 4/29/2022
8.1.0-pre202204290644 517 4/29/2022
8.0.5 11,206 3/24/2022
8.0.5-pre202203191529 566 3/19/2022
8.0.5-pre202203191312 522 3/19/2022
8.0.4 12,171 3/5/2022
8.0.4-pre202203040658 542 3/4/2022
8.0.3 31,949 12/5/2021
8.0.3-pre202112031043 1,224 12/3/2021
8.0.3-pre202112030833 1,228 12/3/2021
8.0.2 4,630 11/21/2021
8.0.1 1,157 11/20/2021
8.0.1-pre202111200140 918 11/20/2021
8.0.0 33,982 11/9/2021
8.0.0-pre202111090825 614 11/9/2021
8.0.0-pre202110240626 1,729 10/24/2021
8.0.0-pre202110161410 736 10/16/2021
8.0.0-pre202110160852 638 10/16/2021
8.0.0-pre202110160831 619 10/16/2021
8.0.0-pre202110131323 655 10/13/2021
8.0.0-pre202110071401 674 10/7/2021
8.0.0-pre202110060758 688 10/6/2021
8.0.0-pre202110060735 580 10/6/2021
8.0.0-pre202109190434 748 9/19/2021
8.0.0-pre202109160117 660 9/16/2021
8.0.0-pre202108141424 761 8/14/2021
8.0.0-pre202107040319 1,178 7/4/2021
7.12.0 41,831 8/6/2021
7.11.0 12,885 5/31/2021
7.10.0 10,574 4/29/2021
7.9.0 13,431 4/20/2021
7.8.3 10,967 3/24/2021
7.8.2 1,145 3/23/2021
7.8.1 3,721 3/11/2021
7.8.1-pre202103031133 762 3/3/2021
7.8.0 6,627 2/21/2021
7.8.0-pre202102210255 675 2/21/2021
7.8.0-pre202102201703 698 2/20/2021
7.7.1 1,740 2/19/2021
7.7.1-pre202102190925 688 2/19/2021
7.7.0 12,000 1/26/2021
7.6.1 3,989 1/15/2021
7.6.0 235,993 1/13/2021
7.5.1 40,109 10/19/2020
7.5.0 1,395 10/17/2020
7.5.0-pre202010141113 775 10/14/2020
7.4.1 19,720 9/23/2020
7.4.0 2,011 9/18/2020
7.3.0 1,534 9/17/2020
7.2.1 24,096 9/11/2020
7.2.0 49,151 8/4/2020
7.1.0 60,890 5/26/2020
7.1.0-pre202005251107 844 5/25/2020
7.0.1 3,548 5/14/2020
7.0.1-pre202005131606 834 5/13/2020
7.0.0 4,811 5/5/2020
7.0.0-ci20200503102823 828 5/3/2020
7.0.0-ci20200503100450 831 5/3/2020
6.2.0 25,018 1/17/2020
6.1.4 15,478 11/16/2019
6.1.3 20,284 9/26/2019
6.1.2 11,781 8/31/2019
6.0.3 9,963 7/26/2019
5.6.0 92,286 6/20/2019
5.5.1 50,189 5/22/2019
5.4.0 8,546 4/3/2019
5.4.0-pre1 1,305 4/3/2019
5.3.2 27,983 12/14/2018
5.3.1 2,057 12/13/2018
5.3.0 56,312 9/28/2018
5.2.0 12,085 8/2/2018
5.1.1 5,408 6/21/2018
5.0.0 5,249 6/3/2018
4.2.2 85,912 4/20/2018
4.2.1 5,012 3/17/2018
4.2.0 9,864 1/28/2018
4.1.1 2,974 1/20/2018
4.1.0 2,257 1/18/2018
4.0.1-pre1 1,675 1/14/2018
4.0.0 5,562 1/8/2018
4.0.0-pre5 1,681 1/6/2018
4.0.0-pre4 2,620 10/21/2017
4.0.0-pre3 2,232 6/16/2017
3.6.0 30,054 3/27/2017
3.5.1 26,358 3/3/2017
3.5.0 4,811 2/15/2017
3.4.0 5,883 11/30/2016
3.3.2 2,809 11/21/2016
3.3.1 3,407 11/15/2016
3.2.0 39,794 10/10/2016
3.1.0 2,236 10/7/2016
3.0.1 5,429 8/13/2016
3.0.0 8,930 8/12/2016
3.0.0-pre5 1,798 7/20/2016
3.0.0-pre4 1,866 7/9/2016
3.0.0-pre3 1,772 7/9/2016
3.0.0-pre2 1,709 7/9/2016
3.0.0-pre1 1,871 7/6/2016
2.9.0 11,188 7/20/2016
2.8.0 4,348 7/2/2016
2.7.4 2,714 6/24/2016
2.7.3.1 2,631 6/16/2016
2.7.3 2,968 6/6/2016
2.7.2 5,770 4/23/2016
2.7.1 3,740 4/9/2016
2.7.0 2,046 4/8/2016
2.6.2 2,269 4/2/2016
2.6.1 1,972 4/2/2016
2.6.0 2,303 3/24/2016
2.6.0-beta1 2,240 2/29/2016
2.5.0 6,694 2/7/2016
2.4.2 3,823 1/10/2016
2.4.1 2,981 12/25/2015
2.4.0 2,108 12/23/2015
2.4.0-pre3 1,800 12/23/2015
2.4.0-pre2 1,787 12/23/2015
2.4.0-pre1 1,805 12/22/2015
2.3.1 2,489 12/18/2015
2.3.0.1 2,808 12/4/2015
2.3.0 2,793 12/1/2015
2.3.0-pre4 2,093 11/27/2015
2.3.0-pre3 2,037 11/26/2015
2.3.0-pre2 2,000 11/26/2015
2.3.0-pre 2,029 11/25/2015
2.2.8.1-pre 1,833 11/24/2015
2.2.8 2,783 11/10/2015
2.2.7.1 2,565 10/26/2015
2.2.7 2,007 10/26/2015
2.2.6.1 2,434 10/12/2015
2.2.6 2,095 10/9/2015
2.2.5 3,279 10/1/2015
2.2.4 2,635 9/11/2015
2.2.3.1 3,088 8/28/2015
2.2.3 2,069 8/27/2015
2.2.2 2,725 7/20/2015
2.2.1 2,645 6/28/2015
2.2.0 3,725 4/24/2015
2.1.8.2 2,351 4/2/2015
2.1.8.1 2,310 3/16/2015
2.1.7 2,104 3/14/2015
2.1.6 2,025 3/14/2015
2.1.5 2,072 3/12/2015
2.1.3 2,046 3/10/2015
2.1.2 2,039 3/8/2015
2.1.1 2,059 3/7/2015
2.1.0 2,611 2/25/2015
2.0.1 2,558 2/23/2015
2.0.0 2,365 2/23/2015
2.0.0-pre8 2,175 2/23/2015
2.0.0-pre7 2,219 2/22/2015
2.0.0-pre6 2,186 2/22/2015
2.0.0-pre5 2,173 2/22/2015
2.0.0-pre4 2,079 2/22/2015
2.0.0-pre3 2,092 2/22/2015
2.0.0-pre2 4,036 2/18/2015
2.0.0-pre1 2,103 2/17/2015
1.2.1 2,508 2/21/2015
1.2.0 2,268 2/17/2015
1.1.2 4,545 2/8/2015
1.1.1.2 2,132 2/6/2015
1.1.1.1 2,899 10/19/2014
1.1.1 2,113 10/19/2014
1.1.0 2,338 10/13/2014
1.1.0-beta2 1,774 10/11/2014
1.1.0-beta1 1,781 10/11/2014
1.0.3.1 2,259 10/10/2014
1.0.3 2,312 10/9/2014
1.0.2.2 2,150 10/5/2014
1.0.2 2,164 9/27/2014
1.0.1.1 2,017 9/27/2014
1.0.1 2,091 9/27/2014
1.0.0.2 2,252 9/4/2014
1.0.0.1 2,110 9/4/2014
1.0.0 2,263 9/4/2014
0.4.5.1 2,568 6/3/2014
0.4.5 2,428 5/7/2014
0.4.5-beta3 1,761 5/6/2014
0.4.5-beta2 2,219 5/6/2014
0.4.5-beta1 1,765 5/6/2014
0.4.4.3 2,220 5/4/2014
0.4.4.2 2,255 5/3/2014
0.4.4.1 2,156 5/3/2014
0.4.4 2,111 5/3/2014
0.4.3.1 2,111 4/30/2014
0.4.2.1 2,616 4/12/2014
0.4.2 2,701 4/11/2014
0.4.2-beta5 2,387 4/11/2014
0.4.2-beta4 2,438 4/11/2014
0.4.2-beta3 1,845 4/4/2014
0.4.2-beta2 1,838 4/4/2014
0.4.2-beta1 1,820 4/1/2014
0.4.1 2,208 2/2/2014
0.4.0.1 2,112 12/31/2013
0.4.0-rc1 1,801 12/16/2013
0.3.2 4,092 11/24/2011
0.3.1 2,364 11/21/2011
0.3.0 2,335 11/20/2011
0.2.0 2,555 10/17/2011
0.1.0 2,573 10/6/2011