public async void Download(string uri, string filename)
{
Uri source;
if (!Uri.TryCreate(uri, UriKind.Absolute, out source))
{
return;
}
string destination = filename.Trim();
if (string.IsNullOrWhiteSpace(destination))
{
return;
}
StorageFile destinationFile;
try
{
destinationFile = await KnownFolders.PicturesLibrary.CreateFileAsync(
destination, CreationCollisionOption.GenerateUniqueName);
}
catch (FileNotFoundException ex)
{
return;
}
BackgroundDownloader downloader = new BackgroundDownloader();
DownloadOperation download = downloader.CreateDownload(source, destinationFile);
download.Priority = BackgroundTransferPriority.Default;
List <DownloadOperation> requestOperations = new List <DownloadOperation>();
requestOperations.Add(download);
// If the app isn't actively being used, at some point the system may slow down or pause long running
// downloads. The purpose of this behavior is to increase the device's battery life.
// By requesting unconstrained downloads, the app can request the system to not suspend any of the
// downloads in the list for power saving reasons.
// Use this API with caution since it not only may reduce battery life, but it may show a prompt to
// the user.
UnconstrainedTransferRequestResult result;
try
{
result = await BackgroundDownloader.RequestUnconstrainedDownloadsAsync(requestOperations);
}
catch (NotImplementedException)
{
return;
}
await HandleDownloadAsync(download, true);
}
private async Task <bool> HandleDownloadsAsync(List <DownloadOperation> downloads, bool start)
{
UnconstrainedTransferRequestResult result;
try
{
result = await BackgroundDownloader.RequestUnconstrainedDownloadsAsync(downloads);
}
catch (NotImplementedException ex)
{
telemetry.TrackException(ex);
}
try
{
List <DownloadOperation> successfullyAddedDownloads = new List <DownloadOperation>();
foreach (var download in downloads)
{
if (_activeDownloads.TryAdd(download.RequestedUri.ToString(), download))
{
successfullyAddedDownloads.Add(download);
_totalDownloads++;
}
}
// Store the download so we can pause/resume.
foreach (var download in successfullyAddedDownloads)
{
Progress <DownloadOperation> progressCallback = new Progress <DownloadOperation>(DownloadProgress);
if (start)
{
// Start the download and attach a progress handler.
await download.StartAsync().AsTask(_cts.Token, progressCallback);
}
else
{
// The download was already running when the application started, re-attach the progress handler.
await download.AttachAsync().AsTask(_cts.Token, progressCallback);
}
}
return(true);
}
catch (TaskCanceledException)
{
InstallationStep = "Cancelled";
return(false);
}
catch (Exception ex)
{
WebErrorStatus error = BackgroundTransferError.GetStatus(ex.HResult);
telemetry.TrackException(ex, new Dictionary <string, string> {
{ "Scenario", "GettingActiveDownloads" }
});
await QuranApp.NativeProvider.ShowErrorMessageBox("Error getting active downloads: " + error.ToString());
return(false);
}
finally
{
try
{
await FinishActiveDownloads();
}
catch (Exception ex)
{
telemetry.TrackException(ex, new Dictionary <string, string> {
{ "Scenario", "GettingActiveDownloads" }
});
}
}
}
async void StartDownload()
{
try
{
//file = await folder.CreateFileAsync(video.Title+video.VideoExtension, CreationCollisionOption.GenerateUniqueName);
file = await folder.CreateFileAsync(youtubeVideo.VideoTitle + "." + youtubeVideo.Extension, CreationCollisionOption.GenerateUniqueName);
}
catch (Exception ex)
{
}
//BackgroundTransferGroup videoGroup = BackgroundTransferGroup.CreateGroup("video");
BackgroundDownloader downloader = new BackgroundDownloader();
//downloader.TransferGroup = videoGroup;
string successToastText = "One of your VIDEO downloads has completed";
string failureToastText = "One of your VIDEO downloads has failed";
XmlDocument successToastXml = ToastNotificationManager.GetTemplateContent(ToastTemplateType.ToastText01);
successToastXml.GetElementsByTagName("text").Item(0).InnerText = successToastText;
ToastNotification successToast = new ToastNotification(successToastXml);
downloader.SuccessToastNotification = successToast;
XmlDocument failureToastXml = ToastNotificationManager.GetTemplateContent(ToastTemplateType.ToastText01);
failureToastXml.GetElementsByTagName("text").Item(0).InnerText = failureToastText;
ToastNotification failureToast = new ToastNotification(failureToastXml);
downloader.FailureToastNotification = failureToast;
DownloadOperation download = downloader.CreateDownload(source, file);
download.CostPolicy = BackgroundTransferCostPolicy.Always;
List <DownloadOperation> requestOperations = new List <DownloadOperation>();
requestOperations.Add(download);
UnconstrainedTransferRequestResult result;
try
{
result = await BackgroundDownloader.RequestUnconstrainedDownloadsAsync(requestOperations);
}
catch (NotImplementedException)
{
return;
}
//await HandleDownloadAsync(download, true);
await Helper.HelperMethods.MessageUser("Your download has been started...");
//gridView = null;
//Frame.Navigate((typeof(MainPage)));
await HandleDownloadAsync(download, true);
//await Task.WhenAll(t);
}
private async void StartDownload(BackgroundTransferPriority priority, bool requestUnconstrainedDownload)
{
// Validating the URI is required since it was received from an untrusted source (user input).
// The URI is validated by calling Uri.TryCreate() that will return 'false' for strings that are not valid URIs.
// Note that when enabling the text box users may provide URIs to machines on the intrAnet that require
// the "Home or Work Networking" capability.
Uri source;
if (!Uri.TryCreate(serverAddressField.Text.Trim(), UriKind.Absolute, out source))
{
rootPage.NotifyUser("Invalid URI.", NotifyType.ErrorMessage);
return;
}
string destination = fileNameField.Text.Trim();
if (string.IsNullOrWhiteSpace(destination))
{
rootPage.NotifyUser("A local file name is required.", NotifyType.ErrorMessage);
return;
}
StorageFile destinationFile;
try
{
destinationFile = await KnownFolders.PicturesLibrary.CreateFileAsync(
destination, CreationCollisionOption.GenerateUniqueName);
}
catch (FileNotFoundException ex)
{
rootPage.NotifyUser("Error while creating file: " + ex.Message, NotifyType.ErrorMessage);
return;
}
BackgroundDownloader downloader = new BackgroundDownloader();
DownloadOperation download = downloader.CreateDownload(source, destinationFile);
Log(String.Format(CultureInfo.CurrentCulture, "Downloading {0} to {1} with {2} priority, {3}",
source.AbsoluteUri, destinationFile.Name, priority, download.Guid));
download.Priority = priority;
if (!requestUnconstrainedDownload)
{
// Attach progress and completion handlers.
await HandleDownloadAsync(download, true);
return;
}
List <DownloadOperation> requestOperations = new List <DownloadOperation>();
requestOperations.Add(download);
// If the app isn't actively being used, at some point the system may slow down or pause long running
// downloads. The purpose of this behavior is to increase the device's battery life.
// By requesting unconstrained downloads, the app can request the system to not suspend any of the
// downloads in the list for power saving reasons.
// Use this API with caution since it not only may reduce battery life, but it may show a prompt to
// the user.
UnconstrainedTransferRequestResult result;
try
{
result = await BackgroundDownloader.RequestUnconstrainedDownloadsAsync(requestOperations);
}
catch (NotImplementedException)
{
rootPage.NotifyUser(
"BackgroundDownloader.RequestUnconstrainedDownloadsAsync is not supported in Windows Phone.",
NotifyType.ErrorMessage);
return;
}
Log(String.Format(CultureInfo.CurrentCulture, "Request for unconstrained downloads has been {0}",
(result.IsUnconstrained ? "granted" : "denied")));
await HandleDownloadAsync(download, true);
}
public async void Download(string DownloadURL, string DestinationFileName, StorageFile destinationFile, AudioEncodingQuality AudioQuality, bool IsVideo, bool IsM4A)
{
try
{
// Temporary destination folder
StorageFile tempDestinationFile = await ApplicationData.Current.TemporaryFolder.CreateFileAsync(DestinationFileName, CreationCollisionOption.GenerateUniqueName);
// Add the place where the user wants to save to a dictionary first. Our file will first be saved to a temp folder
if (StorageFileDictionary.ContainsKey(tempDestinationFile.Name))
{
StorageFileDictionary.Remove(tempDestinationFile.Name);
}
StorageFileDictionary.Add(tempDestinationFile.Name, destinationFile);
// Add to audio encoding quality
if (!IsVideo)
{
if (AudioQualityDictionary.ContainsKey(tempDestinationFile.Name))
{
AudioQualityDictionary.Remove(tempDestinationFile.Name);
}
AudioQualityDictionary.Add(tempDestinationFile.Name, AudioQuality);
}
// Add to isMusicDictionary
if (IsMusicDictionary.ContainsKey(tempDestinationFile.Name))
{
IsMusicDictionary.Remove(tempDestinationFile.Name);
}
IsMusicDictionary.Add(tempDestinationFile.Name, !IsVideo);
// Add to M4A dictionary, since Windows Phone doesnt support mp3
if (IsisM4ADictionary.ContainsKey(tempDestinationFile.Name))
{
IsisM4ADictionary.Remove(tempDestinationFile.Name);
}
IsisM4ADictionary.Add(tempDestinationFile.Name, IsM4A);
// Create a new instance of background downloader
BackgroundDownloader downloader = new BackgroundDownloader();
Uri fileDownloadUri = new Uri(DownloadURL, UriKind.Absolute);
DownloadOperation download = downloader.CreateDownload(fileDownloadUri, tempDestinationFile);
download.Priority = BackgroundTransferPriority.High;
Debug.WriteLine(String.Format(CultureInfo.CurrentCulture, "Downloading {0} to {1} with {2} priority, {3}", fileDownloadUri.AbsoluteUri, DestinationFileName, download.Priority, download.Guid));
List <DownloadOperation> requestOperations = new List <DownloadOperation>();
requestOperations.Add(download);
// If the app isn't actively being used, at some point the system may slow down or pause long running
// downloads. The purpose of this behavior is to increase the device's battery life.
// By requesting unconstrained downloads, the app can request the system to not suspend any of the
// downloads in the list for power saving reasons.
// Use this API with caution since it not only may reduce battery life, but it may show a prompt to
// the user.
UnconstrainedTransferRequestResult result;
try
{
result = await BackgroundDownloader.RequestUnconstrainedDownloadsAsync(requestOperations);
}
catch (NotImplementedException)
{
Debug.WriteLine("BackgroundDownloader.RequestUnconstrainedDownloadsAsync is not supported in Windows Phone.");
return;
}
Debug.WriteLine(String.Format(CultureInfo.CurrentCulture, "Request for unconstrained downloads has been {0}",
(result.IsUnconstrained ? "granted" : "denied")));
await HandleDownloadAsync(download, true);
}
catch (Exception ex)
{
IsExceptionHandled("Download Error", ex);
}
}
