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(.NET Core C#) Unzip Binary File to StreamDemonstrates how to unzip a large binary file to a stream to allow the application to process the uncompressed bytes chunk by chunk. Note: This example requires Chilkat v11.0.0 or greater.
bool success = false; // This requires the Chilkat Zip API to have been previously unlocked. // See Unlock Chilkat Zip for sample code. Chilkat.Zip zip = new Chilkat.Zip(); // First open a .zip. success = zip.OpenZip("qa_data/zips/big.zip"); if (success == false) { Debug.WriteLine(zip.LastErrorText); return; } // Get the entry to be unzipped to a stream.. Chilkat.ZipEntry entry = new Chilkat.ZipEntry(); success = zip.EntryAt(0,entry); if (success == false) { Debug.WriteLine(zip.LastErrorText); return; } Chilkat.Stream dataStream = new Chilkat.Stream(); Chilkat.Task unzipTask = entry.UnzipToStreamAsync(dataStream); if (entry.LastMethodSuccess != true) { Debug.WriteLine(entry.LastErrorText); return; } // Start the background unzip thread. unzipTask.Run(); // We'll read the uncompressed data chunk-by-chunk and write to an output file. Chilkat.FileAccess fac = new Chilkat.FileAccess(); success = fac.OpenForWrite("qa_output/out.dat"); if (success != true) { Debug.WriteLine(fac.LastErrorText); return; } // Read the stream. (this is reading the unzipped file data) Chilkat.BinData bd = new Chilkat.BinData(); while (dataStream.EndOfStream != true) { // Get the next chunk of decompressed bytes. dataStream.ReadBd(bd); // Do something with it.. // In this simple example, we'll just write to the file. fac.FileWriteBd(bd,0,0); // Clear for the next read. bd.Clear(); } fac.FileClose(); Debug.WriteLine("Success."); |
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