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

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

XAML

In SfPopup’s ContentTemplate, add a behavior to the parent Grid 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" VerticalOptions="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#

You can access the ListView instance using the ChildAdded event or the FindByName method in behavior.

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 the 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);
    }
}

Download the complete sample from 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 with configuration specifications. You can also explore our .NET MAUI ListView example to understand how to create and manipulate data.

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