Question

我在第一页上列出了带有汽车物品的清单。我要从列表中单击汽车，然后单击一个按钮，该按钮会将选定的汽车发送到另一个uwp页面上的列表。
我试图将listCar.selecteditems放在我创建的名为purchase的空列表中，并在第2页上显示purchase。使用目前的代码，它仅显示{{1 }}在第2页的列表中。
任何帮助正确显示此表示赞赏。

Page1.xaml.cs

ProjectName_Car

Page2.xaml.cs

private void Add_Click(object sender, RoutedEventArgs e)
    {
        var query = listCars.SelectedItems.ToList().Cast<Car>();

        foreach (var item in query)
        {
            purchase.Add(item);
        }

        liistCar.ItemsSource = purchase;
        Frame.Navigate(typeof(Page2), listCar.Items);
    }

编辑：Page1.xaml

protected override void OnNavigatedTo(NavigationEventArgs e)
    {
        base.OnNavigatedTo(e);

        lstCars.ItemsSource =  e.Parameter as List<Car> ;

    }

Answer 1

此参数将您选择的汽车列表对象及其所有属性作为参数传输到下一页。

MainPage.xaml

<Page
    x:Class="App1.MainPage"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:local="using:App1"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    mc:Ignorable="d"
    x:Name="YourPage"

    Background="{ThemeResource ApplicationPageBackgroundThemeBrush}">
    <StackPanel  x:Name="Stacky" HorizontalAlignment="Stretch" Background="Aqua" VerticalAlignment="Stretch">
        <ListBox Name="listCars" ItemsSource="{x:Bind cars}" SelectionMode="Multiple"  Grid.Column="0"  Grid.Row="1" Background="#FFF1EFEF" Opacity="0.7" Foreground="Black" Margin="10,10,94,10" Grid.RowSpan="2">
            <ListBox.ItemTemplate>
                <DataTemplate x:DataType="local:Car">
                    <StackPanel Padding="20" BorderThickness="2" BorderBrush="Black">
                        <Image Width="200" Height="150" HorizontalAlignment="Left" Source="{x:Bind imgCar}" />
                        <TextBlock FontSize="22" HorizontalAlignment="Left" Text="{x:Bind name}" Style="{StaticResource HeaderTextBlockStyle}"/>
                        <TextBlock FontSize="16" HorizontalAlignment="Left"> € <Run Text="{x:Bind price}" /></TextBlock>
                    </StackPanel>
                </DataTemplate>
            </ListBox.ItemTemplate>
        </ListBox>
        <Button Content="Done Selecting" Click="Add_Click"></Button>
    </StackPanel>
</Page>

MainPage.xaml.cs

public sealed partial class MainPage : Page
    {

        List<Car> cars = new List<Car>();
        public MainPage()
        {
            cars.Add(new Car() { imgCar = "ms-appx:///Assets/1.jpg", name = "Car1", price = "10000" });
            cars.Add(new Car() { imgCar = "ms-appx:///Assets/2.jpg", name = "Car2", price = "10001" });
            cars.Add(new Car() { imgCar = "ms-appx:///Assets/3.jpg", name = "Car3", price = "10002" });
            this.InitializeComponent();    

        }
        private void Add_Click(object sender, RoutedEventArgs e)
        {
            List<Car> mySelectedItems = new List<Car>();
            foreach (Car item in listCars.SelectedItems)
            {
                mySelectedItems.Add(item);
            }
            Frame.Navigate(typeof(Page2), mySelectedItems);
        }
    }
    public class Car
    {
        public string imgCar { get; set; }
        public string name { get; set; }
        public string price { get; set; }
    }

Page2.xaml

<Page
    x:Class="App1.Page2"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:local="using:App1"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    mc:Ignorable="d"
    Background="{ThemeResource ApplicationPageBackgroundThemeBrush}">

    <Grid>
        <ListBox Name="listCars"  SelectionMode="Multiple"  Grid.Column="0"  Grid.Row="1" Background="#FFF1EFEF" Opacity="0.7" Foreground="Black" Margin="10,10,94,10" Grid.RowSpan="2">
            <ListBox.ItemTemplate>
                <DataTemplate x:DataType="local:Car">
                    <StackPanel Padding="20" BorderThickness="2" BorderBrush="Black">
                        <Image Width="200" Height="150" HorizontalAlignment="Left" Source="{x:Bind imgCar}" />
                        <TextBlock FontSize="22" HorizontalAlignment="Left" Text="{x:Bind name}" Style="{StaticResource HeaderTextBlockStyle}"/>
                        <TextBlock FontSize="16" HorizontalAlignment="Left"> € <Run Text="{x:Bind price}" /></TextBlock>
                    </StackPanel>
                </DataTemplate>
            </ListBox.ItemTemplate>
        </ListBox>
    </Grid>
</Page>

Page2.xaml.cs

  public sealed partial class Page2 : Page
    {
        public Page2()
        {
            this.InitializeComponent();
        }
        protected override void OnNavigatedTo(NavigationEventArgs e)
        {
            var items  =   e.Parameter as List<Car>;
            listCars.ItemsSource = items;
            base.OnNavigatedTo(e);
        }
    }

将选定的列表框项目发送到其他uwp页面上的另一个列表框

1 个答案: