Fix your Compress function: private static byte[] Compress(Stream input) { using( var compressStream = new MemoryStream()) using(var compressor = new. Example of the DeflateStream & GZipStream in C#. GitHub Gist: instantly share code, notes, and snippets. DeflateStream DeflateStream(Stream, CompressionMode, Boolean) Initializes a new instance of the DeflateStream class by using the specified stream and.

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DeflateStream Constructor (ssion) | Microsoft Docs

Creates an object that contains all the relevant information required to generate a proxy used to communicate with a remote object. Compressing seems to work correctly since the code below compresses my Stream to a bytes long array.

Gets a value indicating whether the stream supports reading while decompressing a file. The CanWrite property on the stream object is false. I think that ideal code will be like this:. Choose the type you’d like to provide: Write uncompressedFileData, 0uncompressedFileData. If no further action occurs, the stream appears as a valid, empty, compressed file.

I answered my own question with a working code example. Must call out that if you call Flush instead of Close it doesn’t work.

Articles Quick Answers Messages Use my saved content filters. Note – you cannot use the deflate stream class to compress files larger than 4 gigabytes. Reads a byte from the stream and advances the position within the stream by one byte, or returns -1 if at the end of the stream. Tymek 81 1 3. This class represents the Deflate algorithm, which is an industry-standard algorithm for lossless file compression and decompression. It is worth remembering that you must reposition streams before reading if you are writing to them, or you will read data from immediately after the last write.


Asynchronously reads a sequence of bytes from the current stream and advances the position within the stream by the number of bytes read. For example, if you are saving a dataset as an XML file, you can use the deflate stream class to compress the xml file so that it does not consume too much space.

The CompressionMode enumeration value ca neither be CompressionMode. The deflate stream class inherits directly from the stream class and ca be used in very instance where the stream class is used.

Asynchronously writes deglatestream sequence of bytes to the current stream and advances the current position within this stream by the number of bytes written.

However, reading the decompressed Stream results in an empty string. Also, no explicit checks are performed, so no additional exceptions are thrown when the new instance is created.

By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of serviceprivacy policy and cookie policyand that your continued use of the website is subject to these policies. Join 4, other followers. Writes compressed bytes to the underlying stream from the specified byte array.

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DeflateStream Class (ssion) | Microsoft Docs

Flush is intended to flush internal buffering, but a deflate stream cannot be finalized until it knows you’re at the endwhich is only possible when the stream x# closed.


As a result, it provides a better compression algorithm and, in most cases, a smaller compressed file than it provides in earlier versions of the. Let’s work to help developers, not make them feel stupid. Fill in your details below or click an icon to log in: Trouble with GZipStream compression and decompression.

All those answers are far away from ideal form because all of you forgot that “using” disposing and closing streams its means that additional Close is not needed. Data is read on a byte-by-byte basis, so it is not possible to perform multiple passes to determine the best method for compressing entire files or large blocks of data.

The deflate stream class provides method for compressing and decompressing deflatesrream by using the deflate algorithm.

Asynchronously clears all buffers for this stream and causes any buffered data to be written to the underlying device. Stack Overflow works best with JavaScript enabled.

How to compress and decompress files with Deflate in .NET C#

Releases the unmanaged resources used by the DeflateStream and optionally releases the managed resources. By default, the compression level is set to Optimal when the compression mode is Compress.

Provide an answer or move on to the next question. Serves as the default hash function.