在ItemSelected - ListView - Xamarin表单上添加复选标记图像

<ListView x:Name="myListView">
    <ListView.ItemTemplate>
        <DataTemplate>
            <ViewCell>
                <StackLayout Orientation="Horizontal">
                    <Image Source="unchecked.png" WidthRequest="20" HeightRequest="20" />
                    <Label Text="{Binding ItemName}" />
                </StackLayout>
            </ViewCell>
        </DataTemplate>
    </ListView.ItemTemplate>
</ListView>

public class Item
{
    public string ItemName { get; set; }
    public bool IsSelected { get; set; }
}

public MainPage()
{
    InitializeComponent();

    ObservableCollection<Item> items = new ObservableCollection<Item>
    {
        new Item { ItemName = "Item 1", IsSelected = false },
        new Item { ItemName = "Item 2", IsSelected = false },
        new Item { ItemName = "Item 3", IsSelected = false }
    };

    myListView.ItemsSource = items;
}

private void myListView_ItemSelected(object sender, SelectedItemChangedEventArgs e)
{
    if (e.SelectedItem != null)
    {
        Item selectedItem = e.SelectedItem as Item;
        selectedItem.IsSelected = !selectedItem.IsSelected;

        Image image = ((sender as ListView).SelectedItem as ViewCell).View.Children[0] as Image;
        image.Source = selectedItem.IsSelected ? "checked.png" : "unchecked.png";

        myListView.SelectedItem = null;
    }
}