readme.md

Meziantou.Framework.WPF

Utilities for WPF applications, including:

• DelegateCommand for synchronous and asynchronous commands
• Enum markup extensions (EnumValuesExtension, LocalizedEnumValuesExtension)
• BooleanToValueConverter for flexible bool-to-value conversion in bindings
• Dispatcher helpers (SwitchToDispatcherThread)

Install

dotnet add package Meziantou.Framework.WPF

Usage

Commands

using Meziantou.Framework.WPF;

public sealed class SampleViewModel
{
    public IDelegateCommand SaveCommand { get; } = DelegateCommand.Create(
        execute: () => Console.WriteLine("Saved"),
        canExecute: () => true);
}

Thread-safe bindable collection

ConcurrentObservableCollection<T> has moved to the Meziantou.Framework.Threading package, where it is bound to a SynchronizationContext instead of a WPF Dispatcher. Creating it on the UI thread keeps the previous behavior:

dotnet add package Meziantou.Framework.Threading

using Meziantou.Framework.Collections.Concurrent;

var collection = new ConcurrentObservableCollection<string>();
listBox.ItemsSource = collection.AsObservable;

await Task.Run(() => collection.Add("Item from background thread"));

Meziantou.Framework.WPF.Collections.ConcurrentObservableCollection<T> no longer exists. Add a reference to the Meziantou.Framework.Threading package and update the using directive.

Enum values in XAML

<Window
    xmlns:wpf="clr-namespace:Meziantou.Framework.WPF;assembly=Meziantou.Framework.WPF">
    <ComboBox
        ItemsSource="{wpf:LocalizedEnumValues {x:Type local:MyEnum}}"
        DisplayMemberPath="Name"
        SelectedValuePath="Value" />
</Window>

Boolean converter

<Window.Resources>
    <wpf:BooleanToValueConverter
        x:Key="BoolToVisibility"
        TrueValue="{x:Static Visibility.Visible}"
        FalseValue="{x:Static Visibility.Collapsed}" />
</Window.Resources>