ReactiveProperty 9.6.0

dotnet add package ReactiveProperty --version 9.6.0                
NuGet\Install-Package ReactiveProperty -Version 9.6.0                
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="9.6.0" />                
For projects that support PackageReference, copy this XML node into the project file to reference the package.
paket add ReactiveProperty --version 9.6.0                
#r "nuget: ReactiveProperty, 9.6.0"                
#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 ReactiveProperty as a Cake Addin
#addin nuget:?package=ReactiveProperty&version=9.6.0

// Install ReactiveProperty as a Cake Tool
#tool nuget:?package=ReactiveProperty&version=9.6.0                

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

Note:

If you’re developing a new application, consider using R3 instead of ReactiveProperty. R3, redesigned by the original author, aligns with the current .NET ecosystem and offers most of the features found in ReactiveProperty.

GitHub - Cysharp/R3

Concept

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 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 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)
Included target framework(s) (in package)
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 (21)

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.
dotnet/dotnet
Home of .NET's Virtual Monolithic Repository which includes all the code needed to build the .NET SDK from source
danm-de/pcsc-sharp
PC/SC wrapper classes for .NET, written in C#
Version Downloads Last updated
9.6.0 23,987 7/14/2024
9.5.0 32,858 2/28/2024
9.4.1 6,055 2/12/2024
9.4.0 1,205 2/11/2024
9.4.0-pre8 671 12/21/2023
9.4.0-pre7 411 12/21/2023
9.4.0-pre6 400 12/21/2023
9.4.0-pre5 409 12/21/2023
9.4.0-pre4 422 12/21/2023
9.3.4 30,613 10/30/2023
9.3.4-pre202310290551 463 10/29/2023
9.3.3 3,503 10/10/2023
9.3.2 7,556 9/25/2023
9.3.2-pre202309140728 600 9/14/2023
9.3.1 14,338 8/11/2023
9.3.0 3,497 7/31/2023
9.3.0-pre202307291429 699 7/29/2023
9.2.0 11,764 6/19/2023
9.2.0-pre202305241301 757 5/25/2023
9.1.2 29,814 3/12/2023
9.0.0 10,976 2/12/2023
9.0.0-pre202302040959 737 2/4/2023
9.0.0-pre202301080724 832 1/8/2023
9.0.0-pre202301050852 715 1/5/2023
8.2.0 42,869 11/10/2022
8.1.2 56,251 6/6/2022
8.1.2-pre202206051057 701 6/5/2022
8.1.1 5,053 5/27/2022
8.1.0 5,671 4/30/2022
8.1.0-pre202204290912 740 4/29/2022
8.1.0-pre202204290644 688 4/29/2022
8.0.5 12,749 3/24/2022
8.0.5-pre202203191529 744 3/19/2022
8.0.5-pre202203191312 697 3/19/2022
8.0.4 17,322 3/5/2022
8.0.4-pre202203040658 729 3/4/2022
8.0.3 45,595 12/5/2021
8.0.3-pre202112031043 1,405 12/3/2021
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8.0.1 1,890 11/20/2021
8.0.1-pre202111200140 1,083 11/20/2021
8.0.0 49,618 11/9/2021
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8.0.0-pre202110240626 2,311 10/24/2021
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8.0.0-pre202110060758 885 10/6/2021
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8.0.0-pre202109190434 923 9/19/2021
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8.0.0-pre202107040319 1,396 7/4/2021
7.12.0 46,981 8/6/2021
7.11.0 14,397 5/31/2021
7.10.0 11,542 4/29/2021
7.9.0 16,917 4/20/2021
7.8.3 12,296 3/24/2021
7.8.2 1,861 3/23/2021
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7.8.0 8,286 2/21/2021
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7.8.0-pre202102201703 870 2/20/2021
7.7.1 2,531 2/19/2021
7.7.1-pre202102190925 877 2/19/2021
7.7.0 15,173 1/26/2021
7.6.1 4,838 1/15/2021
7.6.0 236,961 1/13/2021
7.5.1 44,893 10/19/2020
7.5.0 2,145 10/17/2020
7.5.0-pre202010141113 949 10/14/2020
7.4.1 23,523 9/23/2020
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7.3.0 2,299 9/17/2020
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7.1.0-pre202005251107 1,026 5/25/2020
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7.0.0-ci20200503102823 1,024 5/3/2020
7.0.0-ci20200503100450 1,015 5/3/2020
6.2.0 27,069 1/17/2020
6.1.4 16,527 11/16/2019
6.1.3 22,622 9/26/2019
6.1.2 12,587 8/31/2019
6.0.3 10,969 7/26/2019
5.6.0 207,863 6/20/2019
5.5.1 59,137 5/22/2019
5.4.0 9,662 4/3/2019
5.4.0-pre1 1,474 4/3/2019
5.3.2 29,724 12/14/2018
5.3.1 2,802 12/13/2018
5.3.0 60,599 9/28/2018
5.2.0 12,965 8/2/2018
5.1.1 6,230 6/21/2018
5.0.0 6,075 6/3/2018
4.2.2 89,983 4/20/2018
4.2.1 5,272 3/17/2018
4.2.0 10,123 1/28/2018
4.1.1 3,163 1/20/2018
4.1.0 2,443 1/18/2018
4.0.1-pre1 1,866 1/14/2018
4.0.0 6,233 1/8/2018
4.0.0-pre5 1,858 1/6/2018
4.0.0-pre4 2,797 10/21/2017
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3.6.0 31,134 3/27/2017
3.5.1 27,240 3/3/2017
3.5.0 5,090 2/15/2017
3.4.0 6,101 11/30/2016
3.3.2 2,998 11/21/2016
3.3.1 3,601 11/15/2016
3.2.0 44,765 10/10/2016
3.1.0 2,444 10/7/2016
3.0.1 6,711 8/13/2016
3.0.0 9,126 8/12/2016
3.0.0-pre5 1,969 7/20/2016
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3.0.0-pre3 1,952 7/9/2016
3.0.0-pre2 1,888 7/9/2016
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2.9.0 11,733 7/20/2016
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2.6.2 2,449 4/2/2016
2.6.1 2,157 4/2/2016
2.6.0 2,488 3/24/2016
2.6.0-beta1 2,413 2/29/2016
2.5.0 7,055 2/7/2016
2.4.2 4,097 1/10/2016
2.4.1 3,172 12/25/2015
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2.4.0-pre3 1,974 12/23/2015
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2.3.0-pre2 2,188 11/26/2015
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1.2.1 2,680 2/21/2015
1.2.0 2,447 2/17/2015
1.1.2 4,795 2/8/2015
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1.1.1.1 3,096 10/19/2014
1.1.1 2,300 10/19/2014
1.1.0 2,530 10/13/2014
1.1.0-beta2 1,956 10/11/2014
1.1.0-beta1 1,955 10/11/2014
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1.0.1.1 2,187 9/27/2014
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0.4.5.1 2,759 6/3/2014
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0.4.5-beta3 1,936 5/6/2014
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0.4.5-beta1 1,940 5/6/2014
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0.4.3.1 2,304 4/30/2014
0.4.2.1 2,806 4/12/2014
0.4.2 2,892 4/11/2014
0.4.2-beta5 2,569 4/11/2014
0.4.2-beta4 2,627 4/11/2014
0.4.2-beta3 2,019 4/4/2014
0.4.2-beta2 2,018 4/4/2014
0.4.2-beta1 2,010 4/1/2014
0.4.1 2,402 2/2/2014
0.4.0.1 2,299 12/31/2013
0.4.0-rc1 1,975 12/16/2013
0.3.2 4,324 11/24/2011
0.3.1 2,550 11/21/2011
0.3.0 2,526 11/20/2011
0.2.0 2,727 10/17/2011
0.1.0 2,920 10/6/2011