public async Task LoadCompressed()
{
try
{
var folder = await Windows.ApplicationModel.Package.Current.InstalledLocation.GetFolderAsync("xml");
var file = await folder.GetFileAsync("world.compressed");
//var stream = await file.OpenStreamForReadAsync();
var decompressedFilename = "world.decompressed";
var decompressedFile = await folder.CreateFileAsync(decompressedFilename, CreationCollisionOption.ReplaceExisting);
using (var compressedInput = await file.OpenSequentialReadAsync())
using (var decompressor = new Decompressor(compressedInput))
using (var decompressedOutput = await decompressedFile.OpenAsync(FileAccessMode.ReadWrite))
{
var bytesDecompressed = await RandomAccessStream.CopyAsync(decompressor, decompressedOutput);
}
}
catch (Exception e)
{
throw e;
}
await Load();
}
public async void Open(TextBox display)
{
try
{
FileOpenPicker picker = new FileOpenPicker();
picker.SuggestedStartLocation = PickerLocationId.DocumentsLibrary;
picker.FileTypeFilter.Add(textExt);
picker.FileTypeFilter.Add(compressedExt);
StorageFile file = await picker.PickSingleFileAsync();
switch (file.FileType)
{
case textExt:
display.Text = await FileIO.ReadTextAsync(file);
break;
case compressedExt:
using (MemoryStream stream = new MemoryStream())
using (IInputStream input = await file.OpenSequentialReadAsync())
using (Decompressor decompressor = new Decompressor(input))
using (IRandomAccessStream output = stream.AsRandomAccessStream())
{
long inputSize = input.AsStreamForRead().Length;
ulong outputSize = await RandomAccessStream.CopyAsync(decompressor, output);
output.Seek(0);
display.Text = await new StreamReader(output.AsStream()).ReadToEndAsync();
Show(string.Format("Decompressed {0} bytes to {1} bytes",
inputSize, outputSize), "Compression App");
}
break;
default:
break;
}
}
catch
{
}
}
private async void CompressFile(CompressAlgorithm? Algorithm, StorageFile originalFile)
{
Progress.Text = "";
try
{
Progress.Text += String.Format("\"{0}\" has been picked\n", originalFile.Name);
var compressedFilename = originalFile.Name + ".compressed";
var compressedFile = await ApplicationData.Current.TemporaryFolder.CreateFileAsync(compressedFilename, CreationCollisionOption.GenerateUniqueName);
Progress.Text += String.Format("\"{0}\" has been created to store compressed data\n", compressedFile.Path);
// ** DO COMPRESSION **
// Following code actually performs compression from original file to the newly created
// compressed file. In order to do so it:
// 1. Opens input for the original file.
// 2. Opens output stream on the file to be compressed and wraps it into Compressor object.
// 3. Copies original stream into Compressor wrapper.
// 4. Finalizes compressor - it puts termination mark into stream and flushes all intermediate
// buffers.
using (var originalInput = await originalFile.OpenReadAsync())
using (var compressedOutput = await compressedFile.OpenAsync(FileAccessMode.ReadWrite))
using (var compressor = !Algorithm.HasValue ?
new Compressor(compressedOutput.GetOutputStreamAt(0)) :
new Compressor(compressedOutput.GetOutputStreamAt(0), Algorithm.Value, 0))
{
Progress.Text += "All streams wired for compression\n";
var bytesCompressed = await RandomAccessStream.CopyAsync(originalInput, compressor);
var finished = await compressor.FinishAsync();
Progress.Text += String.Format("Compressed {0} bytes into {1}\n", bytesCompressed, compressedOutput.Size);
}
var decompressedFilename = originalFile.Name + ".decompressed";
var decompressedFile = await ApplicationData.Current.TemporaryFolder.CreateFileAsync(decompressedFilename, CreationCollisionOption.GenerateUniqueName);
Progress.Text += String.Format("\"{0}\" has been created to store decompressed data\n", decompressedFile.Path);
// ** DO DECOMPRESSION **
// Following code performs decompression from the just compressed file to the
// decompressed file. In order to do so it:
// 1. Opens input stream on compressed file and wraps it into Decompressor object.
// 2. Opens output stream from the file that will store decompressed data.
// 3. Copies data from Decompressor stream into decompressed file stream.
using (var compressedInput = await compressedFile.OpenSequentialReadAsync())
using (var decompressor = new Decompressor(compressedInput))
using (var decompressedOutput = await decompressedFile.OpenAsync(FileAccessMode.ReadWrite))
{
Progress.Text += "All streams wired for decompression\n";
var bytesDecompressed = await RandomAccessStream.CopyAsync(decompressor, decompressedOutput);
Progress.Text += String.Format("Decompressed {0} bytes of data\n", bytesDecompressed);
}
rootPage.NotifyUser("All done", NotifyType.StatusMessage);
}
catch (Exception ex)
{
rootPage.NotifyUser(ex.Message, NotifyType.ErrorMessage);
}
}
