PresentationBase 3.6.0

Suggested Alternatives

CommunityToolkit.Mvvm

dotnet add package PresentationBase --version 3.6.0
NuGet\Install-Package PresentationBase -Version 3.6.0
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="PresentationBase" Version="3.6.0" />
For projects that support PackageReference, copy this XML node into the project file to reference the package.
paket add PresentationBase --version 3.6.0
#r "nuget: PresentationBase, 3.6.0"
#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 PresentationBase as a Cake Addin
#addin nuget:?package=PresentationBase&version=3.6.0

// Install PresentationBase as a Cake Tool
#tool nuget:?package=PresentationBase&version=3.6.0

PresentationBase Logo PresentationBase

Azure DevOps builds (branch) Azure DevOps tests (branch) SonarCloud Quality Gate NuGet version NuGet downloads GitHub license

A lightweight MVVM implementation for WPF (Windows Presentation Foundation) targeting both .NET Framework and .NET.

It contains base implementations for view models (and their commands), frequently used value converters, useful XAML markup extensions and more. I consider these as a bare minimum when I start professional or free time WPF projects.

Examples

Take a look at the Quick start in the wiki. Here are some basic examples for using PresentationBase:

ViewModels with bindable properties

// C# code
public class AwesomeViewModel : ViewModel
{
    private string _name;
  
    public string Name
    {
        get => _name;
        set => SetProperty(ref _name, value);
    }
}

<TextBox Text="{Binding Name, UpdateSourceTrigger=PropertyChanged}" />

... and with property validation

// C# code
public class AwesomeViewModel : ViewModel
{
    private string _name;

    public string Name
    {
        get => _name;
        set => SetProperty(ref _name, value, NameValidation);
    }

    private IEnumerable<string> NameValidation(string value)
    {
        if (string.IsNullOrEmpty(value))
            yield return "Name cannot be null or empty!";
        else if (value == "sungaila")
            yield return "Name cannot be stupid!";
    }
}

<TextBox Text="{Binding Name, UpdateSourceTrigger=PropertyChanged}" />

ViewModel collections

// C# code
public class AwesomeViewModel : ViewModel
{
    public ObservableViewModelCollection<ChildViewModel> Children { get; }
    
    public AwesomeViewModel()
    {
        Children = new ObservableViewModelCollection<ChildViewModel>(this);
        Children.Add(new ChildViewModel { Nickname = "Blinky" });
        Children.Add(new ChildViewModel { Nickname = "Pinky" });
        Children.Add(new ChildViewModel { Nickname = "Inky" });
        Children.Add(new ChildViewModel { Nickname = "Clyde" });
    }
}

<ListView ItemsSource="{Binding Children}">
    <ListView.ItemTemplate>
        <DataTemplate>
            <TextBlock Text="{Binding Nickname}" />
        </DataTemplate>
    </ListView.ItemTemplate>
</ListView>

... and collection compositions

// C# code
public class AwesomeViewModel : ViewModel
{
    public ObservableViewModelCollection<ChildViewModel> Children { get; }

    public ObservableViewModelCollection<PersonViewModel> People { get; }

    public CompositeViewModelCollection<ViewModel> Composition { get; }
    
    public AwesomeViewModel()
    {
        Children = new ObservableViewModelCollection<ChildViewModel>(this);
        Children.Add(new ChildViewModel { Nickname = "Blinky" });
        Children.Add(new ChildViewModel { Nickname = "Pinky" });
        Children.Add(new ChildViewModel { Nickname = "Inky" });
        Children.Add(new ChildViewModel { Nickname = "Clyde" });

        People = new ObservableViewModelCollection<PersonViewModel>(this);
        People.Add(new PersonViewModel { Nickname = "Kevin" });
        People.Add(new PersonViewModel { Nickname = "Tommy" });

        Composition = new CompositeViewModelCollection<ViewModel>();
        Composition.Add(Children);
        Composition.Add(People);
    }
}

<ListView ItemsSource="{Binding Composition}">
    <ListView.ItemTemplate>
        <DataTemplate>
            <TextBlock Text="{Binding Nickname}" />
        </DataTemplate>
    </ListView.ItemTemplate>
</ListView>

Commands

Your command can be defined anywhere you want (as long as its assembly is referenced by the WPF application). Please note that a parameterless constructor (or none at all) is needed.

// C# code
public class AlertCommand : ViewModelCommand<AwesomeViewModel>
{
    public override void Execute(AwesomeViewModel parameter)
    {
        System.Windows.MessageBox.Show("You just clicked that button.");
    }

    public override bool CanExecute(AwesomeViewModel parameter)
    {
        return parameter.Name != "John Doe";
    }
}

The only reference needed is the x:Type in XAML. Important: Make sure to write CommandParameter before Command to avoid problems with CanExecute. Consider to create an issue for the .NET Core team (like this one) if you want this WPF bug fixed.


<Window x:Class="WpfApp.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:Core="clr-namespace:PresentationBase;assembly=PresentationBase"
        xmlns:local="clr-namespace:WpfApp">
        
        <Button CommandParameter="{Binding}"
                Command="{Core:CommandBinding {x:Type local:AlertCommand}}" />
</Window>

... and async commands

// C# code
public class AlertCommandAsync : ViewModelCommandAsync<AwesomeViewModel>
{
    protected override async Task ExecutionAsync(AwesomeViewModel parameter)
    {
        await Task.Run(() =>
        {
            System.Threading.Thread.Sleep(2000);
            System.Windows.MessageBox.Show("You clicked that button two seconds ago.");
        });
    }
}

<Window x:Class="WpfApp.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:Core="clr-namespace:PresentationBase;assembly=PresentationBase"
        xmlns:local="clr-namespace:WpfApp">
        
        <Button CommandParameter="{Binding}"
                Command="{Core:CommandBinding {x:Type local:AlertCommandAsync}}" />
</Window>

ValueConverters


<Window x:Class="WpfApp.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:Converters="clr-namespace:PresentationBase.Converters;assembly=PresentationBase"
        xmlns:local="clr-namespace:WpfApp">
        
        <TextBox Visibility="{Binding Name, Converter={Converters:NullToVisibilityConverter}}" />
</Window>
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.  net6.0-windows7.0 is compatible.  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 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 netcoreapp3.1 is compatible. 
.NET Framework net462 is compatible.  net463 was computed.  net47 was computed.  net471 was computed.  net472 was computed.  net48 is compatible.  net481 was computed. 
Compatible target framework(s)
Included target framework(s) (in package)
Learn more about Target Frameworks and .NET Standard.

NuGet packages

This package is not used by any NuGet packages.

GitHub repositories

This package is not used by any popular GitHub repositories.

Version Downloads Last updated
3.6.0 589 6/15/2022
3.5.0 377 11/27/2021
3.4.0 546 1/6/2021
3.4.0-preview 389 11/11/2020
3.3.0 661 9/20/2020
3.2.0 497 8/24/2020
3.1.0 546 6/26/2020
3.0.0 564 5/20/2020
2.3.1 550 3/24/2020
2.3.0 575 1/19/2020
2.2.1 809 1/15/2020
2.2.0 601 1/4/2020
2.1.2 556 12/25/2019
2.0.3 590 12/22/2019

- Updated to PresentationBase.Core 3.6.0.
- Added .NET 6.0 as a target framework.