Windows Phone 几种页面间传递数据的方式

首先，我们要引用：using Microsoft.Phone.Shell;

第一种：

// 导航到新页面

NavigationService.Navigate(new Uri("/DetailsPage.xaml?selectedItem=" + MainListBox.SelectedIndex, UriKind.Relative));

DetailPage.xaml.cs

// 导航页面以将数据上下文设置为列表中的所选项时

protected override void OnNavigatedTo(NavigationEventArgs e)

{

   string selectedIndex = "";

   if (NavigationContext.QueryString.TryGetValue("selectedItem", out selectedIndex))

   {

      int index = int.Parse(selectedIndex);

      DataContext = App.ViewModel.Items[index];

   }
}

第二种：

第一个页面

PhoneApplicationService phoneAppService = PhoneApplicationService.Current;

protected override void OnNavigatedFrom(System.Windows.Navigation.NavigationEventArgs e)

{

    phoneAppService.State["myValue"] = textBox1.Text;

    base.OnNavigatedFrom(e);

}

传递到第二个页面

PhoneApplicationService phoneAppService = PhoneApplicationService.Current;

protected override void OnNavigatedTo(System.Windows.Navigation.NavigationEventArgs e)

{

    object someObject;

    if (phoneAppService.State.ContainsKey("myValue"))

    {

         if (phoneAppService.State.TryGetValue("myValue", out someObject))

         {

             textBox1.Text = someObject.ToString();

          }

     }

     base.OnNavigatedTo(e);

}