Version	Build status	NuGet package
Prerelease
Stable

CollectionViewSource.Forms

A CollectionViewSource implementation for Xamarin Forms that supports filtering, sorting and grouping.

Quickstart

Add the CollectionView.Forms NuGet package to your Xamarin Forms project:

Install-Package CollectionViewSource.Forms -IncludePrerelease

All existing classes and interfaces reside in a single namespace. To use them from C# code:

using Rotorsoft.Forms;

And to use them from XAML markup:

xmlns:rotorsoft="clr-namespace:Rotorsoft.Forms;assembly=CollectionViewSource.Forms"

To use a CollectionViewSource object from XAML, create it as a static resource at the page level and remember to set the BindingContext explicitly (unlike WPF or UWP, Xamarin Forms doesn't propagate the parent's binding context to a child static resource).

<ContentPage.Resources>
    <rotorsoft:CollectionViewSource
        x:Key="DataSource"
        BindingContext="{Binding Path=BindingContext, Source={x:Reference _page}, Mode=OneWay}" 
        Source="{Binding Items, Mode=OneWay}" />
</ContentPage.Resources>  

And then bind to its View property from either a ListView or CollectionView:

<CollectionView ItemsSource="{Binding View, Source={StaticResource DataSource}}">
</CollectionView>

All CollectionViewSource properties (except Filter, which can only be set using bindings or C# code) can be either set explicitly through XAML or through the use of bindings:

<rotorsoft:CollectionViewSource
    x:Key="XamlDataSource">
    <rotorsoft:CollectionViewSource.Source>
        <collections:List x:TypeArguments="x:String">
            <x:String>Lorem</x:String>
            <x:String>Ipsum</x:String>
            <x:String>Dolor</x:String>
            <x:String>Sit</x:String>
            <x:String>Amet</x:String>
        </collections:List>
    </rotorsoft:CollectionViewSource.Source>
    <rotorsoft:CollectionViewSource.SortDescriptions>
        <x:Array Type="{x:Type rotorsoft:SortDescription}">
            <rotorsoft:SortDescription Direction="Ascending" PropertyName="" />
        </x:Array>
    </rotorsoft:CollectionViewSource.SortDescriptions>
</rotorsoft:CollectionViewSource>     

<rotorsoft:CollectionViewSource
    x:Key="BindingsDataSource"
    BindingContext="{Binding Path=BindingContext, Source={x:Reference _page}, Mode=OneWay}"
    Source="{Binding Items, Mode=OneWay}"
    Filter="{Binding Filter, Mode=OneWay}"
    SortDescriptions="{Binding SortDescriptions, Mode=OneWay}" />

Features