ReactiveProperty.Core 9.5.0

dotnet add package ReactiveProperty.Core --version 9.5.0
NuGet\Install-Package ReactiveProperty.Core -Version 9.5.0
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.Core" Version="9.5.0" />
For projects that support PackageReference, copy this XML node into the project file to reference the package.
paket add ReactiveProperty.Core --version 9.5.0
#r "nuget: ReactiveProperty.Core, 9.5.0"
#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.Core as a Cake Addin
#addin nuget:?package=ReactiveProperty.Core&version=9.5.0

// Install ReactiveProperty.Core as a Cake Tool
#tool nuget:?package=ReactiveProperty.Core&version=9.5.0

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 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)
Included target framework(s) (in package)
Learn more about Target Frameworks and .NET Standard.

NuGet packages (2)

Showing the top 2 NuGet packages that depend on ReactiveProperty.Core:

Package Downloads
ReactiveProperty

ReactiveProperty is MVVM and Asynchronous Extensions for Reactive Extensions(System.Reactive).

ReduxDotnet

Type safe Redux implementation for .NET 6.

GitHub repositories (1)

Showing the top 1 popular GitHub repositories that depend on ReactiveProperty.Core:

Repository Stars
leezer3/OpenBVE
OpenBVE- A free train simulator
Version Downloads Last updated
9.5.0 10,358 2/28/2024
9.4.1 3,777 2/12/2024
9.4.0 562 2/11/2024
9.4.0-pre8 550 12/21/2023
9.4.0-pre7 339 12/21/2023
9.4.0-pre6 340 12/21/2023
9.4.0-pre5 318 12/21/2023
9.4.0-pre4 331 12/21/2023
9.3.4 20,219 10/30/2023
9.3.4-pre202310290551 414 10/29/2023
9.3.3 2,795 10/10/2023
9.3.2 5,888 9/25/2023
9.3.2-pre202309140728 520 9/14/2023
9.3.1 12,450 8/11/2023
9.3.0 2,873 7/31/2023
9.3.0-pre202307291429 619 7/29/2023
9.2.0 9,170 6/19/2023
9.2.0-pre202305241301 700 5/25/2023
9.1.2 22,678 3/12/2023
9.1.0 1,301 3/12/2023
9.0.0 8,882 2/12/2023
9.0.0-pre202302040959 660 2/4/2023
9.0.0-pre202301080724 779 1/8/2023
9.0.0-pre202301050852 664 1/5/2023
8.2.0 29,529 11/10/2022
8.1.2 44,474 6/6/2022
8.1.2-pre202206051057 644 6/5/2022
8.1.1 4,577 5/27/2022
8.1.0 5,258 4/30/2022
8.1.0-pre202204290912 632 4/29/2022
8.1.0-pre202204290644 649 4/29/2022
8.0.5 12,424 3/24/2022
8.0.5-pre202203191529 687 3/19/2022
8.0.5-pre202203191312 642 3/19/2022
8.0.4 13,922 3/5/2022
8.0.4-pre202203040658 691 3/4/2022
8.0.3 36,904 12/5/2021
8.0.3-pre202112031043 1,386 12/3/2021
8.0.3-pre202112030833 1,333 12/3/2021
8.0.2 5,003 11/21/2021
8.0.1 1,461 11/20/2021
8.0.1-pre202111200140 1,037 11/20/2021
8.0.0 38,199 11/9/2021
8.0.0-pre202111090825 783 11/9/2021
8.0.0-pre202110240626 1,957 10/24/2021
8.0.0-pre202110161410 940 10/16/2021
8.0.0-pre202110160852 766 10/16/2021
8.0.0-pre202110160831 781 10/16/2021
8.0.0-pre202110131323 826 10/13/2021
8.0.0-pre202110071401 830 10/7/2021
8.0.0-pre202110060758 851 10/6/2021
8.0.0-pre202110060735 700 10/6/2021
8.0.0-pre202109190434 898 9/19/2021
8.0.0-pre202109160117 827 9/16/2021
8.0.0-pre202108141424 903 8/14/2021
8.0.0-pre202107040319 1,346 7/4/2021
7.12.0 43,823 8/6/2021
7.11.0 13,340 5/31/2021
7.10.0 10,853 4/29/2021
7.9.0 14,870 4/20/2021
7.8.3 11,630 3/24/2021
7.8.2 1,633 3/23/2021
7.8.1 3,912 3/11/2021
7.8.1-pre202103031133 915 3/3/2021
7.8.0 7,057 2/21/2021
7.8.0-pre202102210255 805 2/21/2021
7.8.0-pre202102201703 817 2/20/2021
7.7.1 1,972 2/19/2021
7.7.1-pre202102190925 835 2/19/2021
7.7.0 18,368 1/26/2021
7.6.1 4,284 1/15/2021
7.6.0 235,618 1/13/2021
7.5.1 42,833 10/19/2020
7.5.0 1,680 10/17/2020
7.5.0-pre202010141113 900 10/14/2020
7.4.1 21,993 9/23/2020
7.4.0 2,299 9/18/2020
7.3.0 1,851 9/17/2020
7.2.1 25,875 9/11/2020
7.2.0 51,356 8/4/2020
7.1.0 62,489 5/26/2020
7.1.0-pre202005251107 975 5/25/2020
7.0.1 3,808 5/14/2020
7.0.1-pre202005131606 949 5/13/2020
7.0.0 5,163 5/5/2020
7.0.0-ci20200503102823 979 5/3/2020
7.0.0-ci20200503100450 978 5/3/2020