如何将选定的文件详细信息传递到另一个页面 - UWP? [英] How to pass seleced file details to another page - UWP?

问题描述

我有一个启动页面(MainPage1.xaml).有一个按钮可以从设备中选择视频文件.现在我想在下一页 (MainPage2.xaml) 上播放选定的文件.我怎样才能在下一页得到这个选定的文件 StorageFile file?

I have a launcher page(MainPage1.xaml).There is a button to select video file from device. Now I want to play that selected file on next page (MainPage2.xaml). How can I get this selcted file StorageFile file on next page?

  private async void Button_Click(object sender, RoutedEventArgs e)
    {  
        StorageFile file;

        FileOpenPicker openPicker = new FileOpenPicker();
        foreach (string extension in FileExtensions.Video)
        {
            openPicker.FileTypeFilter.Add(extension);
        }
        file = await openPicker.PickSingleFileAsync();

        this.Frame.Navigate(typeof(MainPage2), file);
    }

推荐答案

您必须覆盖页面(下一页)中的 OnNavigatedTo() 方法，该方法需要 StorageFile:

You have to override the OnNavigatedTo() method in your page (next Page) which is expecting the StorageFile:

protected override void OnNavigatedTo(NavigationEventArgs e)
{
     if (e.Parameter != null)
     {
        StorageFile file = (StorageFile)e.Parameter;
     }
}

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