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 1,070 2/12/2024
9.4.0 221 2/11/2024
9.4.0-pre8 444 12/21/2023
9.4.0-pre7 227 12/21/2023
9.4.0-pre6 210 12/21/2023
9.4.0-pre5 221 12/21/2023
9.4.0-pre4 229 12/21/2023
9.3.4 13,767 10/30/2023
9.3.4-pre202310290551 284 10/29/2023
9.3.3 2,405 10/10/2023
9.3.2 4,079 9/25/2023
9.3.2-pre202309140728 397 9/14/2023
9.3.1 11,243 8/11/2023
9.3.0 2,523 7/31/2023
9.3.0-pre202307291429 528 7/29/2023
9.2.0 8,098 6/19/2023
9.2.0-pre202305241301 576 5/25/2023
9.1.2 19,953 3/12/2023
9.0.0 8,286 2/12/2023
9.0.0-pre202302040959 548 2/4/2023
9.0.0-pre202301080724 620 1/8/2023
9.0.0-pre202301050852 533 1/5/2023
8.2.0 27,990 11/10/2022
8.1.2 38,584 6/6/2022
8.1.2-pre202206051057 536 6/5/2022
8.1.1 4,092 5/27/2022
8.1.0 4,625 4/30/2022
8.1.0-pre202204290912 569 4/29/2022
8.1.0-pre202204290644 515 4/29/2022
8.0.5 11,176 3/24/2022
8.0.5-pre202203191529 564 3/19/2022
8.0.5-pre202203191312 521 3/19/2022
8.0.4 12,106 3/5/2022
8.0.4-pre202203040658 541 3/4/2022
8.0.3 31,818 12/5/2021
8.0.3-pre202112031043 1,223 12/3/2021
8.0.3-pre202112030833 1,227 12/3/2021
8.0.2 4,612 11/21/2021
8.0.1 1,144 11/20/2021
8.0.1-pre202111200140 917 11/20/2021
8.0.0 33,768 11/9/2021
8.0.0-pre202111090825 614 11/9/2021
8.0.0-pre202110240626 1,722 10/24/2021
8.0.0-pre202110161410 734 10/16/2021
8.0.0-pre202110160852 637 10/16/2021
8.0.0-pre202110160831 617 10/16/2021
8.0.0-pre202110131323 654 10/13/2021
8.0.0-pre202110071401 674 10/7/2021
8.0.0-pre202110060758 686 10/6/2021
8.0.0-pre202110060735 579 10/6/2021
8.0.0-pre202109190434 747 9/19/2021
8.0.0-pre202109160117 659 9/16/2021
8.0.0-pre202108141424 760 8/14/2021
8.0.0-pre202107040319 1,176 7/4/2021
7.12.0 41,676 8/6/2021
7.11.0 12,862 5/31/2021
7.10.0 10,558 4/29/2021
7.9.0 13,364 4/20/2021
7.8.3 10,924 3/24/2021
7.8.2 1,132 3/23/2021
7.8.1 3,704 3/11/2021
7.8.1-pre202103031133 761 3/3/2021
7.8.0 6,597 2/21/2021
7.8.0-pre202102210255 675 2/21/2021
7.8.0-pre202102201703 697 2/20/2021
7.7.1 1,725 2/19/2021
7.7.1-pre202102190925 688 2/19/2021
7.7.0 11,957 1/26/2021
7.6.1 3,965 1/15/2021
7.6.0 235,981 1/13/2021
7.5.1 39,945 10/19/2020
7.5.0 1,383 10/17/2020
7.5.0-pre202010141113 774 10/14/2020
7.4.1 19,672 9/23/2020
7.4.0 2,000 9/18/2020
7.3.0 1,523 9/17/2020
7.2.1 23,991 9/11/2020
7.2.0 49,065 8/4/2020
7.1.0 60,775 5/26/2020
7.1.0-pre202005251107 844 5/25/2020
7.0.1 3,535 5/14/2020
7.0.1-pre202005131606 833 5/13/2020
7.0.0 4,796 5/5/2020
7.0.0-ci20200503102823 827 5/3/2020
7.0.0-ci20200503100450 829 5/3/2020
6.2.0 24,969 1/17/2020
6.1.4 15,465 11/16/2019
6.1.3 20,221 9/26/2019
6.1.2 11,769 8/31/2019
6.0.3 9,945 7/26/2019
5.6.0 91,939 6/20/2019
5.5.1 50,096 5/22/2019
5.4.0 8,533 4/3/2019
5.4.0-pre1 1,304 4/3/2019
5.3.2 27,954 12/14/2018
5.3.1 2,045 12/13/2018
5.3.0 56,262 9/28/2018
5.2.0 12,070 8/2/2018
5.1.1 5,392 6/21/2018
5.0.0 5,237 6/3/2018
4.2.2 85,760 4/20/2018
4.2.1 5,012 3/17/2018
4.2.0 9,863 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 5,557 1/8/2018
4.0.0-pre5 1,680 1/6/2018
4.0.0-pre4 2,620 10/21/2017
4.0.0-pre3 2,230 6/16/2017
3.6.0 30,040 3/27/2017
3.5.1 26,356 3/3/2017
3.5.0 4,809 2/15/2017
3.4.0 5,882 11/30/2016
3.3.2 2,807 11/21/2016
3.3.1 3,406 11/15/2016
3.2.0 39,706 10/10/2016
3.1.0 2,234 10/7/2016
3.0.1 5,401 8/13/2016
3.0.0 8,928 8/12/2016
3.0.0-pre5 1,796 7/20/2016
3.0.0-pre4 1,864 7/9/2016
3.0.0-pre3 1,770 7/9/2016
3.0.0-pre2 1,707 7/9/2016
3.0.0-pre1 1,869 7/6/2016
2.9.0 11,180 7/20/2016
2.8.0 4,340 7/2/2016
2.7.4 2,712 6/24/2016
2.7.3.1 2,628 6/16/2016
2.7.3 2,966 6/6/2016
2.7.2 5,768 4/23/2016
2.7.1 3,739 4/9/2016
2.7.0 2,045 4/8/2016
2.6.2 2,267 4/2/2016
2.6.1 1,970 4/2/2016
2.6.0 2,301 3/24/2016
2.6.0-beta1 2,239 2/29/2016
2.5.0 6,692 2/7/2016
2.4.2 3,821 1/10/2016
2.4.1 2,980 12/25/2015
2.4.0 2,107 12/23/2015
2.4.0-pre3 1,799 12/23/2015
2.4.0-pre2 1,786 12/23/2015
2.4.0-pre1 1,803 12/22/2015
2.3.1 2,486 12/18/2015
2.3.0.1 2,804 12/4/2015
2.3.0 2,791 12/1/2015
2.3.0-pre4 2,090 11/27/2015
2.3.0-pre3 2,035 11/26/2015
2.3.0-pre2 1,997 11/26/2015
2.3.0-pre 2,026 11/25/2015
2.2.8.1-pre 1,832 11/24/2015
2.2.8 2,782 11/10/2015
2.2.7.1 2,564 10/26/2015
2.2.7 2,006 10/26/2015
2.2.6.1 2,432 10/12/2015
2.2.6 2,093 10/9/2015
2.2.5 3,277 10/1/2015
2.2.4 2,633 9/11/2015
2.2.3.1 3,086 8/28/2015
2.2.3 2,068 8/27/2015
2.2.2 2,723 7/20/2015
2.2.1 2,644 6/28/2015
2.2.0 3,724 4/24/2015
2.1.8.2 2,349 4/2/2015
2.1.8.1 2,308 3/16/2015
2.1.7 2,102 3/14/2015
2.1.6 2,023 3/14/2015
2.1.5 2,070 3/12/2015
2.1.3 2,045 3/10/2015
2.1.2 2,037 3/8/2015
2.1.1 2,058 3/7/2015
2.1.0 2,609 2/25/2015
2.0.1 2,556 2/23/2015
2.0.0 2,363 2/23/2015
2.0.0-pre8 2,173 2/23/2015
2.0.0-pre7 2,218 2/22/2015
2.0.0-pre6 2,185 2/22/2015
2.0.0-pre5 2,172 2/22/2015
2.0.0-pre4 2,078 2/22/2015
2.0.0-pre3 2,091 2/22/2015
2.0.0-pre2 4,034 2/18/2015
2.0.0-pre1 2,101 2/17/2015
1.2.1 2,507 2/21/2015
1.2.0 2,267 2/17/2015
1.1.2 4,544 2/8/2015
1.1.1.2 2,130 2/6/2015
1.1.1.1 2,897 10/19/2014
1.1.1 2,111 10/19/2014
1.1.0 2,337 10/13/2014
1.1.0-beta2 1,772 10/11/2014
1.1.0-beta1 1,780 10/11/2014
1.0.3.1 2,258 10/10/2014
1.0.3 2,311 10/9/2014
1.0.2.2 2,149 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