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

You can access the named SfListView defined inside DataTemplate of SfPopup by using Behavior.

XAML

In SfPopup’s ContentTemplate, behaviour added to parent of ListView.

<popup:SfPopup x:Name="popupLayout">
    <popup:SfPopup.ContentTemplate>
        <DataTemplate>
            <Grid>
                <Grid.Behaviors>
                    <local:GridBehavior/>
                </Grid.Behaviors>
                
                <Grid.RowDefinitions>
                    <RowDefinition Height="50"/>
                    <RowDefinition Height="*"/>
                </Grid.RowDefinitions>
                
                <Button Text="Find ListView" x:Name="listviewButton" BackgroundColor="LightGray"/>
                <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.RowDefinitions>
                                    <RowDefinition Height="*" />
                                </Grid.RowDefinitions>
                                <Grid.ColumnDefinitions>
                                    <ColumnDefinition Width="50" />
                                    <ColumnDefinition Width="*" />
                                </Grid.ColumnDefinitions>

                                <Image Source="{Binding ContactImage}"
               VerticalOptions="Center"
               HorizontalOptions="Center"
               HeightRequest="50"/>

                                <Label  Grid.Column="1"
                HorizontalTextAlignment="Center"
                HorizontalOptions="StartAndExpand"
                LineBreakMode="NoWrap"
                Text="{Binding ContactName}" 
                FontSize="Medium" />

                            </Grid>
                        </DataTemplate>
                    </sfListView:SfListView.ItemTemplate>
                </sfListView:SfListView>
            </Grid>
        </DataTemplate>
    </popup:SfPopup.ContentTemplate>
</popup:SfPopup>

C#

In ChildAdded event you will get the instance of ListView.

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;
    }
    
   //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;
    }
    //Method 1 : Get SfListView reference using Grid.ChildAdded Event
    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 how to access a named ListView inside a XAML DataTemplate in .NET MAUI ListView.

You can refer to our .NET MAUI ListView feature tour page to know about its other groundbreaking feature representations and documentation, and how to quickly get started for configuration specifications. You can also explore our .NET MAUI ListView example to understand how to create and manipulate data.

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