Question

我有listview的类，listview从sqlite获取值

public Lista()
    {
        this.InitializeComponent();
        carregaLista();
    }


    protected override void OnNavigatedTo(NavigationEventArgs e)
    {
    }

    private void AppBarButton_Click(object sender, RoutedEventArgs e)
    {
        Frame.Navigate(typeof(Home));
    }


    public async void carregaLista()
    {

        var local = Path.Combine(Windows.Storage.ApplicationData.Current.LocalFolder.Path, "hinos.sqlite");
        SQLiteAsyncConnection con = new SQLiteAsyncConnection(local, SQLiteOpenFlags.Create | SQLiteOpenFlags.ReadWrite);

        listaHinos.ItemsSource = await con.Table<hinos>().ToListAsync();
    }

    public void listaHinos_SelectionChanged(object sender, SelectionChangedEventArgs e)
    {
        Frame.Navigate(typeof(hinoDetail),listaHinos.ItemsSource); // passing listview to hinoDetail Class
    }

我将列表视图传递给
下面的hinoDetail类

 public hinoDetail()
    {
        this.InitializeComponent();

    }

    protected override void OnNavigatedTo(NavigationEventArgs e)
    {
        // List<hinos> result = e.Parameter as List<hinos>;
        hinos result = (e.Parameter as List<hinos>).FirstOrDefault(); // get first line only
        nomeHinoDetail.Text = result.numHino + " " + result.nomeHino;
        textBlock.Text = result.letraHino;
    }

    private void AppBarButton_Click(object sender, RoutedEventArgs e)
    {
        Frame.Navigate(typeof(Lista));
    }

hinoDetail类只获取listview中的第一个值，因为（FirstOrDefault（）但我不知道我需要什么方法。）我想得到我点击的值。（如果我点击第1个 - ＆gt;获得第1个，如果我在第2个点击 - ＆gt;获得第2个值）.....

Answer 1

您无需将整个列表项源传递给hinoDetail类。它（按名称）是一个细节类，在任何情况下都需要一个hino实例。

Frame.Navigate(typeof(hinoDetail),listaHinos.SelectedItem);

然后在hinoDetail类中：

hinos result = (e.Parameter as hinos);

单击其他page.xaml中的项目时获取listview值

1 个答案: