How to display the items count of group in the group header item in Xamarin.Forms ListView?
In Xamarin.Forms ListView, you can display the items count for each group in the group header item by customizing the GroupHeaderTemplate property and to expand/collapse the groups at runtime you need to define the AllowGroupExpandCollapse as true like following code example. So, when you tap on the group header, then the tapped group gets collapse if the group is in expand state and vice-versa.
XAML
<listView:SfListView x:Name="listView" ItemSize="70"
GroupHeaderSize="60" AllowGroupExpandCollapse="True"
ItemsSource="{Binding Items}"/>
To display the total number of items in each group in the group header item, you need to bind the Count property in the GroupHeaderTemplate as like following code example.
XAML
<listView:SfListView.GroupHeaderTemplate>
<DataTemplate>
<Grid BackgroundColor="#E4E4E4">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*"/>
<ColumnDefinition Width="*"/>
</Grid.ColumnDefinitions>
<StackLayout Orientation="Horizontal" HorizontalOptions="Start"
VerticalOptions="Center" Padding="10,0,0,0">
<Label Text="{Binding Key}" TextColor="Black" FontSize="Medium"/>
<Label Text="Year" TextColor="Black" FontSize="Medium"/>
</StackLayout>
<StackLayout Orientation="Horizontal" Grid.Column="1" Padding="0,0,20,0"
HorizontalOptions="EndAndExpand" VerticalOptions="Center">
<Label Text="{Binding Count}" TextColor="Black" FontSize="Medium"/>
<Label Text="Item(s)" TextColor="Black" FontSize="Medium"/>
</StackLayout>
</Grid>
</DataTemplate>
</listView:SfListView.GroupHeaderTemplate>
Now run the application to render the following output.
Sample Link: ListView_Grouping
Conclusion
I hope you enjoyed learning about how to display the items count of group in the group header item in Xamarin.Forms ListView.
You can refer to our Xamarin.Forms ListView feature tour page to know about its other groundbreaking feature representations and documentation, and how to quickly get started for configuration specifications.
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