private async Task <StorageFolder> extractFiles(StorageFile zipfilename)
{
StorageFolder storfolder = null;
try
{
// Create stream for compressed files in memory
using (MemoryStream zipMemoryStream = new MemoryStream())
{
using (Windows.Storage.Streams.IRandomAccessStream zipStream = await zipfilename.OpenAsync(FileAccessMode.Read))
{
// Read compressed data from file to memory stream
using (Stream instream = zipStream.AsStreamForRead())
{
byte[] buffer = new byte[1024];
while (instream.Read(buffer, 0, buffer.Length) > 0)
{
zipMemoryStream.Write(buffer, 0, buffer.Length);
}
}
}
storfolder = await ApplicationData.Current.LocalFolder.CreateFolderAsync(zipfilename.DisplayName, CreationCollisionOption.GenerateUniqueName);
// Create zip archive to access compressed files in memory stream
using (ZipArchive zipArchive = new ZipArchive(zipMemoryStream, ZipArchiveMode.Read))
{
// For each compressed file...
foreach (ZipArchiveEntry entry in zipArchive.Entries)
{
// ... read its uncompressed contents
using (Stream entryStream = entry.Open())
{
if (entry.Name != "")
{
string fileName = entry.FullName.Replace("/", @"\");
byte[] buffer = new byte[entry.Length];
entryStream.Read(buffer, 0, buffer.Length);
// Create a file to store the contents
StorageFile uncompressedFile = await storfolder.CreateFileAsync(fileName, CreationCollisionOption.ReplaceExisting);
// Store the contents
using (Windows.Storage.Streams.IRandomAccessStream uncompressedFileStream = await uncompressedFile.OpenAsync(FileAccessMode.ReadWrite))
{
using (Stream outstream = uncompressedFileStream.AsStreamForWrite())
{
outstream.Write(buffer, 0, buffer.Length);
outstream.Flush();
}
}
}
}
}
}
}
}
catch
{
//this.pbar.IsIndeterminate = false;
//this.Add.IsEnabled = true;
//this.imageGrid.Visibility = Windows.UI.Xaml.Visibility.Collapsed;
if (storfolder != null)
{
await storfolder.DeleteAsync();
}
return(null);
}
finally
{
zipfilename.DeleteAsync();
}
return(storfolder);
}