How to apply sorting and grouping in Xamarin.Forms ListView?
The SortDescriptor and the GroupDescriptor can be added using the DataTrigger in Xamarin.Forms ListView.
XAML
Add the DataTrigger for SfListView and define the DataSource based on the ViewModel property. When the value bound to the DataTrigger is changed, the DataSource with specific GroupDescriptor and SortDescriptor is updated at the run time. Also, define the GroupHeaderTemplate in the trigger to customize the GroupHeader at run time.
<syncfusion:SfListView x:Name="listView" ItemSpacing="16,0,16,0"
ItemSize="60"
ItemsSource="{Binding ContactsInfo}">
<syncfusion:SfListView.Triggers>
<DataTrigger TargetType="syncfusion:SfListView" Binding="{Binding SortDirection}" Value="Ascending">
<Setter Property="DataSource">
<Setter.Value>
<data:DataSource>
<data:DataSource.GroupDescriptors>
<data:GroupDescriptor PropertyName="ContactType"/>
</data:DataSource.GroupDescriptors>
<data:DataSource.SortDescriptors>
<data:SortDescriptor PropertyName="ContactName" Direction="Ascending"/>
</data:DataSource.SortDescriptors>
</data:DataSource>
</Setter.Value>
</Setter>
<Setter Property="GroupHeaderTemplate">
<Setter.Value>
<DataTemplate>
<Grid BackgroundColor="Green" HeightRequest="50">
<Label Text="{Binding Key}" Padding="10,0,0,0" VerticalOptions="Center" TextColor="White" FontAttributes="Bold"/>
</Grid>
</DataTemplate>
</Setter.Value>
</Setter>
</DataTrigger>
<DataTrigger TargetType="syncfusion:SfListView" Binding="{Binding SortDirection}" Value="Descending">
<Setter Property="DataSource">
<Setter.Value>
<data:DataSource>
<data:DataSource.GroupDescriptors>
<data:GroupDescriptor PropertyName="ContactType"/>
</data:DataSource.GroupDescriptors>
<data:DataSource.SortDescriptors>
<data:SortDescriptor PropertyName="ContactName" Direction="Descending"/>
</data:DataSource.SortDescriptors>
</data:DataSource>
</Setter.Value>
</Setter>
<Setter Property="GroupHeaderTemplate">
<Setter.Value>
<DataTemplate>
<Grid BackgroundColor="Red" HeightRequest="50">
<Label Text="{Binding Key}" Padding="10,0,0,0" VerticalOptions="Center" TextColor="White" FontAttributes="Bold"/>
</Grid>
</DataTemplate>
</Setter.Value>
</Setter>
</DataTrigger>
</syncfusion:SfListView.Triggers>
...
</syncfusion:SfListView>
Conclusion
I hope you enjoyed learning about how to apply sorting and grouping in Xamarin.Forms ListView.
You can refer to our Xamarin.Forms ListView feature tour page to know about its other groundbreaking feature representations. You can also explore our Xamarin.Forms ListView documentation to understand how to create and manipulate data.
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