public async Task <Stream> ReadFileAsync(string share, string filename, Stream stream, CancellationToken token = default(CancellationToken))
{
if (string.IsNullOrEmpty(share))
{
throw new ArgumentNullException("share");
}
if (string.IsNullOrEmpty("filename"))
{
throw new ArgumentNullException("filename");
}
if (stream == null)
{
throw new ArgumentNullException("stream");
}
Exception error = null;
Stopwatch watch = new Stopwatch();
watch.Start();
double time = watch.Elapsed.TotalMilliseconds;
long bytesTransferred = 0;
try
{
CloudFileShare choudShare = client.GetShareReference(share);
CloudFileDirectory dir = choudShare.GetRootDirectoryReference();
CloudFile file = dir.GetFileReference(filename);
IProgress <StorageProgress> progressHandler = new Progress <StorageProgress>(
progress =>
{
bytesTransferred = bytesTransferred < progress.BytesTransferred ? progress.BytesTransferred : bytesTransferred;
if (watch.Elapsed.TotalMilliseconds > time + 1000.0 && bytesTransferred <= progress.BytesTransferred)
{
OnDownloadBytesTransferred?.Invoke(this, new BytesTransferredEventArgs(share, filename, bytesTransferred, file.Properties.Length));
}
});
await file.DownloadToStreamAsync(stream, default(AccessCondition), default(FileRequestOptions), default(OperationContext), progressHandler, token);
}
catch (Exception ex)
{
if (ex.InnerException is TaskCanceledException)
{
stream = null;
}
else
{
error = ex;
throw ex;
}
}
finally
{
watch.Stop();
OnDownloadCompleted?.Invoke(this, new BlobCompleteEventArgs(share, filename, token.IsCancellationRequested, error));
}
return(stream);
}
private void Remote_OnDownloadBytesTransferred(object sender, BytesTransferredEventArgs e)
{
OnDownloadBytesTransferred?.Invoke(this, e);
}