How to edit the ListView tapped item in Xamarin.Forms (SfListView) using DataForm

You can edit the tapped ListViewItem by binding the item to DataForm in Xamarin.Forms SfListView.

The following article explains you how to edit the listview item in another page.

https://www.syncfusion.com/kb/11286/how-to-edit-the-listview-tapped-item-in-xamarin-forms-sflistview-using-dataform

XAML

ListView ItemTemplate defined with Edit button to edit the data

<ContentPage xmlns:listView="clr-namespace:Syncfusion.ListView.XForms;assembly=Syncfusion.SfListView.XForms">
    <ContentPage.Content>
        <Grid>
           <listView:SfListView x:Name="listView" 
                           ItemsSource="{Binding contactsinfo}" >
                        <listView:SfListView.ItemTemplate>
                            <DataTemplate>
                                <StackLayout >
                                <Grid>
                                            <Image Source="{Binding ContactImage}" />
                                            <StackLayout Grid.Column="1">
                                                <Label Text="{Binding ContactName}"/>
                                                <Label Text="{Binding ContactNumber}"/>
                                            </StackLayout>
                                            <Grid Grid.Column="2">
                                                <Button x:Name="ZoomIn" Text="Edit" Command="{Binding Path=BindingContext.TapCommand, Source={x:Reference Name=listView}}" 
                                            CommandParameter="{Binding .}" />
                                            </Grid>
                                        </Grid>   
                                    </StackLayout>                                    
                            </DataTemplate>
                        </listView:SfListView.ItemTemplate>
           </listView:SfListView>
        </Grid>
    </ContentPage.Content>
</ContentPage>

XAML

DataForm defined with TappedItem binding from ViewModel.

<Grid>
    <dataForm:SfDataForm x:Name="dataForm" 
                         LabelPosition="Top" CommitMode="PropertyChanged"
                         DataObject="{Binding TappedItem}"/>
    <Button Text="Done" Command="{Binding DoneCommand}" Grid.Row="1"/>
</Grid>

C#

On edit, Update the edited item to TappedItem property and navigate to DataForm page

public class ContactsViewModel : INotifyPropertyChanged
{
    private Contacts _tappedItem;
    public Command<object> TapCommand { get; set; }
    public Command<object> DoneCommand { get; set; }
 
    public Contacts TappedItem
    {
        get => _tappedItem;
        set {
            _tappedItem = value;
            OnPropertyChanged("TappedItem");
        }
    }
 
    public ContactsViewModel()
    {
        TapCommand = new Command<object>(ButtonTapped);
        DoneCommand = new Command<object>(DoneTapped);
    }
 
    private void DoneTapped(object obj)
    {
        App.Current.MainPage.Navigation.PopAsync();
    }
 
    private void ButtonTapped(object obj)
    {
        TappedItem = obj as Contacts;
        var dataForm = new EditPage();
        dataForm.BindingContext = this;
        App.Current.MainPage.Navigation.PushAsync(dataForm);
    }
}

Output