ReactiveProperty.Core 9.7.0

dotnet add package ReactiveProperty.Core --version 9.7.0
                    
NuGet\Install-Package ReactiveProperty.Core -Version 9.7.0
                    
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="9.7.0" />
                    
For projects that support PackageReference, copy this XML node into the project file to reference the package.
<PackageVersion Include="ReactiveProperty.Core" Version="9.7.0" />
                    
Directory.Packages.props
<PackageReference Include="ReactiveProperty.Core" />
                    
Project file
For projects that support Central Package Management (CPM), copy this XML node into the solution Directory.Packages.props file to version the package.
paket add ReactiveProperty.Core --version 9.7.0
                    
#r "nuget: ReactiveProperty.Core, 9.7.0"
                    
#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.
#addin nuget:?package=ReactiveProperty.Core&version=9.7.0
                    
Install ReactiveProperty.Core as a Cake Addin
#tool nuget:?package=ReactiveProperty.Core&version=9.7.0
                    
Install ReactiveProperty.Core as a Cake Tool

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 for InteractiveServer render mode. This is for .NET 8.0 or later.

The following packages are no longer supported.

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 was computed.  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.  net9.0 is compatible.  net9.0-android was computed.  net9.0-browser was computed.  net9.0-ios was computed.  net9.0-maccatalyst was computed.  net9.0-macos was computed.  net9.0-tvos was computed.  net9.0-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
9.7.0 11,496 1/27/2025
9.7.0-pre2 105 1/27/2025
9.7.0-pre1 112 1/24/2025
9.6.0 44,204 7/14/2024
9.5.0 43,771 2/28/2024
9.4.1 7,100 2/12/2024
9.4.0 1,536 2/11/2024
9.4.0-pre8 659 12/21/2023
9.4.0-pre7 409 12/21/2023
9.4.0-pre6 421 12/21/2023
9.4.0-pre5 395 12/21/2023
9.4.0-pre4 409 12/21/2023
9.3.4 37,284 10/30/2023
9.3.4-pre202310290551 481 10/29/2023
9.3.3 3,949 10/10/2023
9.3.2 8,726 9/25/2023
9.3.2-pre202309140728 593 9/14/2023
9.3.1 15,373 8/11/2023
9.3.0 3,876 7/31/2023
9.3.0-pre202307291429 679 7/29/2023
9.2.0 13,243 6/19/2023
9.2.0-pre202305241301 761 5/25/2023
9.1.2 32,759 3/12/2023
9.1.0 2,239 3/12/2023
9.0.0 11,914 2/12/2023
9.0.0-pre202302040959 726 2/4/2023
9.0.0-pre202301080724 875 1/8/2023
9.0.0-pre202301050852 734 1/5/2023
8.2.0 50,240 11/10/2022
8.1.2 59,596 6/6/2022
8.1.2-pre202206051057 727 6/5/2022
8.1.1 5,624 5/27/2022
8.1.0 6,347 4/30/2022
8.1.0-pre202204290912 701 4/29/2022
8.1.0-pre202204290644 719 4/29/2022
8.0.5 14,139 3/24/2022
8.0.5-pre202203191529 767 3/19/2022
8.0.5-pre202203191312 713 3/19/2022
8.0.4 18,368 3/5/2022
8.0.4-pre202203040658 763 3/4/2022
8.0.3 52,065 12/5/2021
8.0.3-pre202112031043 1,457 12/3/2021
8.0.3-pre202112030833 1,405 12/3/2021
8.0.2 6,255 11/21/2021
8.0.1 2,327 11/20/2021
8.0.1-pre202111200140 1,112 11/20/2021
8.0.0 53,532 11/9/2021
8.0.0-pre202111090825 849 11/9/2021
8.0.0-pre202110240626 2,419 10/24/2021
8.0.0-pre202110161410 1,017 10/16/2021
8.0.0-pre202110160852 839 10/16/2021
8.0.0-pre202110160831 861 10/16/2021
8.0.0-pre202110131323 898 10/13/2021
8.0.0-pre202110071401 907 10/7/2021
8.0.0-pre202110060758 945 10/6/2021
8.0.0-pre202110060735 762 10/6/2021
8.0.0-pre202109190434 980 9/19/2021
8.0.0-pre202109160117 895 9/16/2021
8.0.0-pre202108141424 991 8/14/2021
8.0.0-pre202107040319 1,438 7/4/2021
7.12.0 48,823 8/6/2021
7.11.0 14,980 5/31/2021
7.10.0 11,940 4/29/2021
7.9.0 18,845 4/20/2021
7.8.3 12,750 3/24/2021
7.8.2 2,539 3/23/2021
7.8.1 5,171 3/11/2021
7.8.1-pre202103031133 994 3/3/2021
7.8.0 8,827 2/21/2021
7.8.0-pre202102210255 883 2/21/2021
7.8.0-pre202102201703 896 2/20/2021
7.7.1 2,888 2/19/2021
7.7.1-pre202102190925 918 2/19/2021
7.7.0 21,402 1/26/2021
7.6.1 5,244 1/15/2021
7.6.0 236,830 1/13/2021
7.5.1 45,617 10/19/2020
7.5.0 2,545 10/17/2020
7.5.0-pre202010141113 979 10/14/2020
7.4.1 25,670 9/23/2020
7.4.0 3,176 9/18/2020
7.3.0 2,746 9/17/2020
7.2.1 27,802 9/11/2020
7.2.0 58,725 8/4/2020
7.1.0 69,317 5/26/2020
7.1.0-pre202005251107 1,062 5/25/2020
7.0.1 4,677 5/14/2020
7.0.1-pre202005131606 1,047 5/13/2020
7.0.0 6,152 5/5/2020
7.0.0-ci20200503102823 1,057 5/3/2020
7.0.0-ci20200503100450 1,056 5/3/2020