Xamarin Forms - 从 ListView 和 Observable 集合中删除行

Question

我有一个简单的问题。如何从 ListView 中删除绑定到可观察集合的行？

这是我的 XAML 代码：

<ListView x:Name="MyListView" ItemsSource="{Binding products}">
                            <ListView.ItemTemplate>
                                <DataTemplate>
                                    <ViewCell>
                                        <ViewCell.ContextActions>
                                            <MenuItem ClassId="{Binding ProductName}" Clicked="DeleteAction" Text="Delete" IsDestructive="true" CommandParameter="{Binding .}" />
                                        </ViewCell.ContextActions>
                                        <StackLayout Orientation="Horizontal" Spacing="10">
                                            <Image Source="{Binding ProductImage}" />
                                            <Label Text="{Binding ProductName}" />
                                            <Label Text="{Binding ProductPrice, StringFormat='{0:C}'}" />

                                        </StackLayout>
                                    </ViewCell>
                                </DataTemplate>
                            </ListView.ItemTemplate>
                        </ListView>

CS 码

public ViewShoppingCart()
        {
            InitializeComponent();

            MyListView.ItemsSource = ShoppingCart.fbproducts;
        }


private void DeleteAction(object sender, System.EventArgs e)
        {
// something goes here
        }

Answer 1

假设 ShoppingCart.fbproducts 将持有 ObservableCollection 的同一个实例而不是重新创建它。您只需

ShoppingCart.fbproducts.Remove(ItemYouWantToRemove)

Xamarin Forms - 从 ListView 和 Observable 集合中删除行

Xamarin Forms - Delete Row from ListView and Observable Collection

c#

mobile

xamarin.ios

ios

xamarin.forms