How to access a named ListView inside a XAML DataTemplate in .NET MAUI (SfListView)?

The .NET MAUI ListView (SfListView) allows you to access the named listview defined inside DataTemplate of Popup by using Behavior.

XAML:

In SfPopup.ContentTemplate, behavior added to parent of ListView.

    <StackLayout>
        <Button x:Name="clickToShowPopup"
            Text="ClickToShowPopup"
            VerticalOptions="Start"
            HorizontalOptions="Center"/>
        <popup:SfPopup x:Name="popup" WidthRequest="350" HeightRequest="350" ShowFooter="False" ShowHeader="False">
            <popup:SfPopup.BindingContext>
                <local:ContactsViewModel/>
            </popup:SfPopup.BindingContext>
            <popup:SfPopup.ContentTemplate>
                <DataTemplate>
                    <Grid>
                        <Grid.Behaviors>
                            <local:GridBehavior/>
                        </Grid.Behaviors>
                        <Grid.RowDefinitions>
                            <RowDefinition Height="50"/>
                            <RowDefinition Height="Auto"/>
                        </Grid.RowDefinitions>

                        <Button Text="Find ListView" Grid.Row="0" x:Name="listviewButton"/>
                        <sfListView:SfListView    x:Name="listView"  ItemSpacing="5" 
                                                    ItemsSource="{Binding Items}" 
                                                    SelectionMode="Single" Grid.Row="1">
                            <sfListView:SfListView.ItemTemplate>
                                <DataTemplate>
                                    <Grid x:Name="grid" RowSpacing="1">
                                       ...
                                    </Grid>
                                </DataTemplate>
                            </sfListView:SfListView.ItemTemplate>
                        </sfListView:SfListView>
                    </Grid>
                </DataTemplate>
            </popup:SfPopup.ContentTemplate>
        </popup:SfPopup>
    </StackLayout>

C#

In ChildAdded event you will get the instance of ListView.

public class GridBehavior : Behavior<Grid>
{
   Grid grid;
   SfListView listView;
   protected override void OnAttachedTo(BindableObject bindable)
   {
      grid = bindable as Grid;
       grid.ChildAdded += Grid_ChildAdded;
   }
   //Method 1 : Get SfListView reference using Grid.ChildAdded Event
   private void Grid_ChildAdded(object sender, ElementEventArgs e)
   {
       if (e.Element is SfListView)
       {
           listView = e.Element as SfListView;
           listView.RefreshView();
       }
   }
   protected override void OnDetachingFrom(BindableObject bindable)
   {
       grid.ChildAdded -= Grid_ChildAdded;
       listView = null;
       grid = null;
       base.OnDetachingFrom(bindable);
   }
}

C#

You can also get the ListView using FindByName method from Parent element.

public class GridBehavior : Behavior<Grid>
{
   Grid grid;
   SfListView listView;
   Button button;
   protected override void OnAttachedTo(BindableObject bindable)
   {
       grid = bindable as Grid;
       grid.ChildAdded += Grid_ChildAdded;
   }
   private void Grid_ChildAdded(object sender, ElementEventArgs e)
   {
       if (e.Element is Button)
       {
           button = e.Element as Button;
           button.Clicked += Button_Clicked;
       }
   }
   //Method 2 : Get SfListView reference using FindByName
   private void Button_Clicked(object sender, EventArgs e)
   {
       listView = grid.FindByName<SfListView>("listView");
       App.Current.MainPage.DisplayAlert("Information", "ListView instance obtained", "Ok");
       listView.ItemTapped += ListView_ItemTapped;
   }

   private void ListView_ItemTapped(object sender, Syncfusion.Maui.ListView.ItemTappedEventArgs e)
   {
       App.Current.MainPage.DisplayAlert("Information", "ListView ItemTapped", "Ok");
   }

   protected override void OnDetachingFrom(BindableObject bindable)
   {
       button.Clicked -= Button_Clicked;
       grid.ChildAdded -= Grid_ChildAdded;
       listView.ItemTapped -= ListView_ItemTapped;
       listView = null;
       button = null;
       grid = null;
       base.OnDetachingFrom(bindable);
   }
}

View Sample in GitHub

Conclusion:

I hope you enjoyed learning about how to access a named ListView inside a XAML DataTemplate in .NET MAUI SfListView.

You can refer to our .NET MAUI SfListView feature tour page to know about its other groundbreaking feature representations and documentation, and how to quickly get started for configuration specifications.

For current customers, you can check out our components from the License and Downloads page. If you are new to Syncfusion, you can try our 30-day free trial to check out our other controls.

If you have any queries or require clarifications, please let us know in the comments section below. You can also contact us through our support forums, Direct-Trac, or feedback portal. We are always happy to assist you!