} // Download
private async Task DownLoadFromAs(string inputURL, string filename, string albumcover = "")
{
StorageFolder MyDownloadFolder;
// 定位 folder
try
{
MyDownloadFolder = await StorageApplicationPermissions.FutureAccessList.GetFolderAsync(App.MyDownLoadFolder);
}
catch (Exception)
{
MyDownloadFolder = await DownloadsFolder.CreateFolderAsync("Music", CreationCollisionOption.GenerateUniqueName);
StorageApplicationPermissions.FutureAccessList.AddOrReplace(App.MyDownLoadFolder, MyDownloadFolder);
}
// check if exists music file
try
{
StorageFile destinationFile = await MyDownloadFolder.CreateFileAsync(filename, CreationCollisionOption.FailIfExists);
if (destinationFile != null)
{
if (PlayArea.Height >= DefaultHeight)
{
TextBlockStatus.Text = "0%";
DownloadBar.Value = 0;
await DownloadBoard.Fade(value : 1.0f, duration : 500, delay : 0, easingType : EasingType.Default).StartAsync();
}
Uri source = new Uri(inputURL);
BackgroundDownloader downloader = new BackgroundDownloader();
DownloadOperation download = downloader.CreateDownload(source, destinationFile);
Progress <DownloadOperation> progress = new Progress <DownloadOperation>(x => ProgressChanged(download));
cancellationToken = new CancellationTokenSource();
await download.StartAsync().AsTask(cancellationToken.Token, progress);
if (DownloadBoard.Opacity == 1.0)
{
await DownloadBoard.Fade(value : 0.0f, duration : 1000, delay : 1000, easingType : EasingType.Default).StartAsync();
}
}
}
catch (Exception)
{
// music exist
FlyoutBase.ShowAttachedFlyout(DownLoadButton);
}
}
async void PrepareSourse()
{
while (MusicRes == "shit")
{
} //not get resourse
StorageFolder MyDownloadFolder;
// 定位 folder
try
{
MyDownloadFolder = await StorageApplicationPermissions.FutureAccessList.GetFolderAsync(App.MyDownLoadFolder);
}
catch (Exception)
{
MyDownloadFolder = await DownloadsFolder.CreateFolderAsync("Music", CreationCollisionOption.GenerateUniqueName);
StorageApplicationPermissions.FutureAccessList.AddOrReplace(App.MyDownLoadFolder, MyDownloadFolder);
}
// try to open exist file
try
{
StorageFile music = await MyDownloadFolder.GetFileAsync(SongPLayingName.Text + MusicRes.Substring(0, 4));
var mediaSource = MediaSource.CreateFromStorageFile(music);
App.Musicplayer.Source = mediaSource;
mediaSource.OpenOperationCompleted += MediaSource_OpenOperationCompleted;
}
// not exist, download it
catch (Exception)
{
StorageFile destinationFile = await MyDownloadFolder.CreateFileAsync(SongPLayingName.Text + MusicRes.Substring(0, 4), CreationCollisionOption.FailIfExists);
var downloader = new BackgroundDownloader();
var downloadOperation = downloader.CreateDownload(new Uri(MusicRes.Substring(4)), destinationFile);
await downloadOperation.StartAsync().AsTask();
var mediaSource = MediaSource.CreateFromStorageFile(destinationFile);
App.Musicplayer.Source = mediaSource;
mediaSource.OpenOperationCompleted += MediaSource_OpenOperationCompleted;
}
}