DSoft.System.Mvvm 2.4.2109.301

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Install-Package DSoft.System.Mvvm -Version 2.4.2109.301
dotnet add package DSoft.System.Mvvm --version 2.4.2109.301
<PackageReference Include="DSoft.System.Mvvm" Version="2.4.2109.301" />
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paket add DSoft.System.Mvvm --version 2.4.2109.301
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#r "nuget: DSoft.System.Mvvm, 2.4.2109.301"
#r directive can be used in F# Interactive, C# scripting and .NET Interactive. Copy this into the interactive tool or source code of the script to reference the package.
// Install DSoft.System.Mvvm as a Cake Addin
#addin nuget:?package=DSoft.System.Mvvm&version=2.4.2109.301

// Install DSoft.System.Mvvm as a Cake Tool
#tool nuget:?package=DSoft.System.Mvvm&version=2.4.2109.301
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Model View View Model (MVVM) classes with built in Dependency Injection (DI) for all variants of .NET.

Also provides centralised multi-platform UI Management for WPF (.NET Framework, .NET Core 3.1 and .NET 5.x) and WinUI 3 (Preview 4 and above)(Experimental)


  • Implements INotifyPropertyChanged
  • Implements INotifyDataErrorInfo
  • Events for handling and detecting changes
  • Additional properties for
    • IsLoaded
    • IsBusy
    • IsBusyReveresed
    • IsValid
    • IsEditable
    • IsEditableReversed
  • Data Validation
  • Built-In Error notification methods
  • ICommand binding helpers
  • Notification extension actions
    • Rather than overriding a property, add an action when it changes
  • Base View Models for
    • Forms
    • Lists
    • Searchable Lists
    • Tree View Searchable Lists
  • UI
    • Core UI functions for Showing Alerts and Confirmation Dialogs (using platform specific implementations)
      • UWP and WPF (.NET Framework and .NET Core 3.0)
    • UI Dependency Service for calling platform UI code from shared code (details below)
  • Services
    • Simple Dependency Service container for dependecy injection service management



This is the base View Model abstract class which contains the most common MVVM functionality


This class inherits from ViewModel and provides additonal functionality for managing lists of data

SearchViewModel<T, T2>

This class inherits from ListViewModel<T,T2> and adds search and filtering functionality to the standard ListViewModel

SearchTreeViewModel<T, T2>

This class inherits from SearchViewModel<T, List<T>> and adds Tree Path preparation to the standard SearchViewModel

Using System.Mvvm

Basic ViewModel

All of the ViewModel base classess are in the System.Mvvm namespace. To create a basic ViewModel simple inherit from ViewModel.

using System.Mvvm;
public class MainViewModel : ViewModel

To create a notifiable property create a full prop using the propfull snippet and add the a call to NotifyPropertyChanged.

    private int myVar;

    public int MyProperty
        get { return myVar; }
        set { myVar = value;  NotifyPropertyChanged();}

NotifyPropertyChanged will automatically pickup the calling member, but you can also be explicit.

    private int myVar;

    public int MyProperty
        get { return myVar; }
        set { myVar = value; NotifyPropertyChanged(nameof(MyProperty)); }


The UI static class provides two features

  • A central interface for calling some simple UI functions
    • ShowAlert
    • ShowConfirmation
  • A simple UI dependency service manager for calling platform specific UI implementations from shared code

The standaerd UI functions can be called directly

var result = await UI.ShowConfirmationDialogAsync("Confirm this", "This is a platform specific confirmation message");

if (result)
    await UI.ShowAlertAsync("YAY!", "You confirmed that");

NOTE: The standard UI functions only work when the platform code has been registered using MvvmManager on the supported plafrom

You can call UI.Register<T> to manually register a class or UI.Init and register the calling assembly and a list of optional external assemblies.

To get the implementation from UI just call the UI.Get<T>() method and it will return the first class the inherits from T(or is T), which will typically be an interface.

For example:

var customUI = UI.Get<ITestCustomUIProvider>();


UI will cache the instance the first time a call to UI.Get<T>() is made for the type of T. Call the UI.Get<T>(bool) overload if you don't want the instance to be cached.


MvvmManager is a class that is found in the Dsoft.System.Mvvm.Ui package and registers the standard UI implementation for UI and registers any instances of the UIServiceAttribute on the calling or external assemblys(when provided).

There is a method called Init on the MvvmManager with and overload that excepts a list of assemblies.

NOTE: Only WPF(.NET framework, .NET Core 3.1, .NET 5.x) and WinUI 3 (Preview 4 and above) are supported with MvvmManager at the moment


Services is a simple dependency service manager for calling platform specific service implementations from shared code

You can call Services.Register<T> to manually register a class or Services.Register to register the calling assembly. Services will locate an instances of MvvmServiceAttribute within the assemblys and register the implementations types.

Addtional Services.Register methods are:

  • Register(Type[] types)
    • Registers a array of implementation types
  • Register(Assembly[] assemblies)
    • Processes a array of Assemblies and registers any instances of the MvvmServiceAttribute
  • Register<T,T2>
    • Explicitly registers an interface, T, against an implementatio, T2

To get the implementation from Services just call the Services.Get<T>() method and it will return the first type the inherits from T(or is T), which will typically be an interface. If you have specified an explicit implementation of an interface the system will return that.

For example:

var deviceProvider = Services.Get<ITestPlatformDeviceService>();

var printers = await deviceProvider.GetPrintersAsync();

Services will cache the instance the first time a call to Services.Get<T>() is made for the type of T.

Note: See SingletonServiceAtrribute below for cached or singleton instances of the service


MvvmServiceAttribute is an assembly level attribute that us used to identify Mvvm Services and register them with the system.

If you want Services.Init to register the implementation then you need to add something like this

[assembly: MvvmService(typeof(TestPlatformDeviceService))]

In this case TestPlatformDeviceService is the implementation.

MvvmServiceAttribute can also be used to explicity registers an interface against an implemenetion type

[assembly: MvvmService(typeof(ITestPlatformDeviceService), typeof(TestPlatformDeviceService))]

In this case TestPlatformDeviceService is the implementation and ITestPlatformDeviceService is the interface


SingletonServiceAttribute allows you to identify an implementation as a singleton instance.

Decorating a clas with this attribute will tel the system to instatiate only a single instance of the implementation.

[assembly: MvvmService(typeof(ITestCustomUIProvider), typeof(TestCustomUIProvider))]
namespace MVVMSample.Providers
    public class TestCustomUIProvider : ITestCustomUIProvider
There are no supported framework assets in this package.

Learn more about Target Frameworks and .NET Standard.

  • .NETStandard 2.0

    • No dependencies.
  • net5.0

    • No dependencies.

NuGet packages (7)

Showing the top 5 NuGet packages that depend on DSoft.System.Mvvm:

Package Downloads

DSoft.WizardControl.WPF is a simple wizard user control for WPF


Core UI library for System.Mvvm.UI


Microsoft.Extensions.Hosting helper library and System.Mvvm extensions


Mvmm based controls and classess for Humbatt.UI.Toolkit.WPF for .Net Core 3.x and Net 5+


Xamarin.Forms platform support for System.Mvvm.UI

GitHub repositories

This package is not used by any popular GitHub repositories.

Version Downloads Last updated
3.0.2111.271-prerelease 54 11/27/2021
3.0.2110.81-prerelease 197 10/8/2021
3.0.2110.71-prerelease 131 10/7/2021
3.0.2110.61-prerelease 138 10/6/2021
3.0.2110.41-prerelease 169 10/4/2021
2.4.2109.301 535 9/30/2021
2.4.2108.41 255 8/5/2021
2.3.2107.201 218 7/20/2021
2.3.2105.221 545 5/24/2021
2.3.2105.211-preview2 131 5/21/2021
2.2.2103.241-preview2 152 3/24/2021
2.2.2102.142-prerelease 84 2/14/2021
2.2.2102.141-preview1 88 2/14/2021
2.1.2103.242-preview2 110 3/24/2021
2.1.2102.81 296 2/8/2021
2.0.2011.103 322 11/10/2020
1.3.2010.162-prerelease 159 10/16/2020
1.3.2010.151-prerelease 182 10/15/2020
1.2.2010.151 237 10/15/2020
1.2.2010.121 289 10/12/2020
1.2.2006.221 431 6/22/2020
1.2.2005.121 303 5/12/2020
1.2.2004.202 289 4/20/2020
1.2.2004.91 321 4/9/2020
1.2.2002.171 1,077 2/17/2020
1.2.1911.261 803 11/26/2019
1.2.1911.212 299 11/21/2019
1.2.1911.211 263 11/21/2019
1.2.1911.55 289 11/5/2019
1.2.1911.54 271 11/5/2019
1.2.1911.51 270 11/5/2019
1.2.1909.251 345 9/25/2019
1.2.1909.202 377 9/20/2019
1.2.1909.201-preview 222 9/20/2019
1.2.1908.819 385 8/8/2019
1.2.1908.817-preview 257 8/8/2019
1.2.0-preview1 273 8/7/2019

- Removed obsolete methods and properties