uwp学习——Naïve媒体播放器2

github：https://github.com/wuqianwen/MediaPlayer2

一、在线播放

参照：https://docs.microsoft.com/zh-cn/windows/uwp/launch-resume/launch-default-app

private async void launchURI_Click(object sender, RoutedEventArgs e)
{
   // The URI to launch
   var uriBing = new Uri(@"http://www.bing.com");

   // Launch the URI
   var success = await Windows.System.Launcher.LaunchUriAsync(uriBing);

   if (success)
   {
      // URI launched
   }
   else
   {
      // URI launch failed
   }
}

　　二、下载保存播放

参照：https://docs.microsoft.com/zh-cn/windows/uwp/files/quickstart-save-a-file-with-a-picker

var savePicker = new Windows.Storage.Pickers.FileSavePicker();
savePicker.SuggestedStartLocation =
    Windows.Storage.Pickers.PickerLocationId.DocumentsLibrary;
// Dropdown of file types the user can save the file as
savePicker.FileTypeChoices.Add("Plain Text", new List<string>() { ".txt" });
// Default file name if the user does not type one in or select a file to replace
savePicker.SuggestedFileName = "New Document";

　　先确定了下载文件以一种什么方式保存本地

再来解决：如何从网上下载下来；

参照：https://docs.microsoft.com/zh-cn/windows/uwp/files/file-access-permissions

using Windows.Storage;            
StorageFile file = await StorageFile.GetFileFromApplicationUriAsync("ms-appx:///file.txt");

　　三、除此之外，我在第一次作业的基础上改了一下界面，使用了NavigationView控件，感觉非常nice；