ReactiveProperty 8.2.0

There is a newer version of this package available.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 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=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.

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 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 alternate text is missing from this package README imagealternate text is missing from this package README image The package includes all core features, and the target platform is .NET Standard 2.0. It fits almost all situations.
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 Core 3.0 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.
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 was computed.  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 (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
9.5.0 5,450 2/28/2024
9.4.1 3,233 2/12/2024
9.4.0 453 2/11/2024
9.4.0-pre8 570 12/21/2023
9.4.0-pre7 349 12/21/2023
9.4.0-pre6 330 12/21/2023
9.4.0-pre5 337 12/21/2023
9.4.0-pre4 352 12/21/2023
9.3.4 17,807 10/30/2023
9.3.4-pre202310290551 402 10/29/2023
9.3.3 2,679 10/10/2023
9.3.2 4,834 9/25/2023
9.3.2-pre202309140728 519 9/14/2023
9.3.1 12,075 8/11/2023
9.3.0 2,837 7/31/2023
9.3.0-pre202307291429 639 7/29/2023
9.2.0 8,785 6/19/2023
9.2.0-pre202305241301 700 5/25/2023
9.1.2 21,607 3/12/2023
9.0.0 8,826 2/12/2023
9.0.0-pre202302040959 676 2/4/2023
9.0.0-pre202301080724 751 1/8/2023
9.0.0-pre202301050852 653 1/5/2023
8.2.0 29,482 11/10/2022
8.1.2 41,655 6/6/2022
8.1.2-pre202206051057 639 6/5/2022
8.1.1 4,318 5/27/2022
8.1.0 4,861 4/30/2022
8.1.0-pre202204290912 675 4/29/2022
8.1.0-pre202204290644 633 4/29/2022
8.0.5 11,528 3/24/2022
8.0.5-pre202203191529 682 3/19/2022
8.0.5-pre202203191312 632 3/19/2022
8.0.4 12,929 3/5/2022
8.0.4-pre202203040658 665 3/4/2022
8.0.3 33,865 12/5/2021
8.0.3-pre202112031043 1,341 12/3/2021
8.0.3-pre202112030833 1,330 12/3/2021
8.0.2 4,856 11/21/2021
8.0.1 1,331 11/20/2021
8.0.1-pre202111200140 1,033 11/20/2021
8.0.0 36,902 11/9/2021
8.0.0-pre202111090825 728 11/9/2021
8.0.0-pre202110240626 1,893 10/24/2021
8.0.0-pre202110161410 854 10/16/2021
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8.0.0-pre202110131323 769 10/13/2021
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8.0.0-pre202110060735 692 10/6/2021
8.0.0-pre202109190434 861 9/19/2021
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8.0.0-pre202108141424 873 8/14/2021
8.0.0-pre202107040319 1,307 7/4/2021
7.12.0 43,297 8/6/2021
7.11.0 13,225 5/31/2021
7.10.0 10,771 4/29/2021
7.9.0 14,053 4/20/2021
7.8.3 11,388 3/24/2021
7.8.2 1,311 3/23/2021
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7.8.0 6,920 2/21/2021
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7.7.1 1,928 2/19/2021
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7.7.0 12,502 1/26/2021
7.6.1 4,230 1/15/2021
7.6.0 236,210 1/13/2021
7.5.1 41,960 10/19/2020
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7.4.1 20,381 9/23/2020
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6.2.0 25,442 1/17/2020
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5.6.0 103,689 6/20/2019
5.5.1 51,647 5/22/2019
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5.3.2 28,258 12/14/2018
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5.2.0 12,294 8/2/2018
5.1.1 5,597 6/21/2018
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4.2.2 87,067 4/20/2018
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0.4.2-beta3 1,958 4/4/2014
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0.4.2-beta1 1,949 4/1/2014
0.4.1 2,328 2/2/2014
0.4.0.1 2,232 12/31/2013
0.4.0-rc1 1,917 12/16/2013
0.3.2 4,231 11/24/2011
0.3.1 2,492 11/21/2011
0.3.0 2,458 11/20/2011
0.2.0 2,661 10/17/2011
0.1.0 2,721 10/6/2011