SmartMvvm.Xaml / SmartMvvm.Avalonia.Xaml

Introduction

SmartMvvm.Xaml contains a set of useful markup extensions and other objects to simplify writing WPF and Avalonia XAML code without the need of code behind or unnecessary UI behavior logic in view model code.

• Supported are projects using at least .NET Framework 4.5 or at least .NET Core 3.1 for WPF and at least .NET Standard 2.0 for Avalonia.

Getting Started

To use these XAML utilities in your project, simply install the SmartMvvm.Xaml (WPF) or SmartMvvm.Avalonia.Xaml (Avalonia) NuGet package to your project.

Check out the sample application (WPF) or sample application (Avalonia) to see how you can use these utilities in your project.

Samples

<!-- combine multiple Bindings and automatically convert the result -->
<ProgressBar Visibility="{And {Binding IsLoading}, {Binding IsConnected}}" />

<!-- evaluate mathematical expressions and format the result -->
<TextBlock Text="{Format 'Results in {0} cells', 
                         {Calc 'x * y', 
                               {Binding NumberOfColumns}, 
                               {Binding NumberOfRows}}}" />

<!-- Conditionally style an element by reusing a stored value -->
<Window.Resources>
  <Var x:Key="TooManyItems" Value="{Greater {Binding ElementName=CountTextBox, Path=Text},
                                            {Int 10000}}" />
</Window.Resources>

<TextBox x:Name="CountTextBox" Text="100" />
<TextBlock Text="{If {Use TooManyItems}, 
                     Then='Too many items!'},
                     Else='Enter the number of items to generate.'}"
           Foreground="{If {Use TooManyItems},
                           Then={x:Static Brushes.Red},
                           Else={x:Static Brushes.Black}}" />