C# GZIPSTREAM PDF

This method shows the use of GZIP on a string. Part A: We use Path. GetTempFileName and File. This writes the string to a temporary file. Part B: We use FileStream here to read in bytes from the file. The using statement provides effective system resource disposal.

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Provides methods and properties used to compress and decompress streams by using the GZip data format specification. The following example shows how to use the GZipStream class to compress and decompress a directory of files.

This class represents the gzip data format, which uses an industry-standard algorithm for lossless file compression and decompression. The format includes a cyclic redundancy check value for detecting data corruption.

The gzip data format uses the same algorithm as the DeflateStream class, but can be extended to use other compression formats. The format can be readily implemented in a manner not covered by patents. Starting with the.

NET Framework 4. 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. NET Framework. Compressed GZipStream objects written to a file with an extension of. 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. If the source data is already compressed, using these classes may actually increase the size of the stream.

Initializes a new instance of the GZipStream class by using the specified stream and compression level. Initializes a new instance of the GZipStream class by using the specified stream and compression level, and optionally leaves the stream open. Initializes a new instance of the GZipStream class by using the specified stream and compression mode. Initializes a new instance of the GZipStream class by using the specified stream and compression mode, and optionally leaves the stream open.

This property is not supported and always throws a NotSupportedException. Gets or sets a value, in milliseconds, that determines how long the stream will attempt to read before timing out. Gets or sets a value, in milliseconds, that determines how long the stream will attempt to write before timing out. Begins an asynchronous read operation. Begins an asynchronous write operation. Closes the current stream and releases any resources such as sockets and file handles associated with the current stream.

Instead of calling this method, ensure that the stream is properly disposed. Reads the bytes from the current GZip stream and writes them to another stream, using a specified buffer size. Reads the bytes from the current stream and writes them to another stream, using a specified buffer size. Asynchronously reads the bytes from the current stream and writes them to another stream, using a specified cancellation token. Asynchronously reads the bytes from the current stream and writes them to another stream, using a specified buffer size.

Asynchronously reads the bytes from the current GZip stream and writes them to another stream, using a specified buffer size. Asynchronously reads the bytes from the current stream and writes them to another stream, using a specified buffer size and cancellation token.

Creates an object that contains all the relevant information required to generate a proxy used to communicate with a remote object. Allocates a WaitHandle object. Releases all resources used by the Stream. Releases the unmanaged resources used by the GZipStream and optionally releases the managed resources. Asynchronously releases the unmanaged resources used by the GZipStream.

Asynchronously releases the unmanaged resources used by the Stream. Waits for the pending asynchronous read to complete. Handles the end of an asynchronous write operation. Ends an asynchronous write operation. Asynchronously clears all buffers for this stream and causes any buffered data to be written to the underlying device. Asynchronously clears all buffers for this GZip stream, causes any buffered data to be written to the underlying device, and monitors cancellation requests.

Asynchronously clears all buffers for this stream, causes any buffered data to be written to the underlying device, and monitors cancellation requests. Retrieves the current lifetime service object that controls the lifetime policy for this instance. Gets the Type of the current instance.

Creates a shallow copy of the current Object. Creates a shallow copy of the current MarshalByRefObject object. Provides support for a Contract. Reads a sequence of bytes from the current GZip stream into a byte span and advances the position within the GZip stream by the number of bytes read. When overridden in a derived class, reads a sequence of bytes from the current stream and advances the position within the stream by the number of bytes read.

Asynchronously reads a sequence of bytes from the current stream and advances the position within the stream by the number of bytes read. Asynchronously reads a sequence of bytes from the current GZip stream into a byte array, advances the position within the GZip stream by the number of bytes read, and monitors cancellation requests.

Asynchronously reads a sequence of bytes from the current stream, advances the position within the stream by the number of bytes read, and monitors cancellation requests. Asynchronously reads a sequence of bytes from the current GZip stream into a byte memory region, advances the position within the GZip stream by the number of bytes read, and monitors cancellation requests.

Reads a byte from the GZip stream and advances the position within the stream by one byte, or returns -1 if at the end of the GZip stream. 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. Writes a sequence of bytes to the current GZip stream from a read-only byte span and advances the current position within this GZip stream by the number of bytes written. When overridden in a derived class, writes a sequence of bytes to the current stream and advances the current position within this stream by the number of bytes written.

Asynchronously writes a sequence of bytes to the current stream and advances the current position within this stream by the number of bytes written. Asynchronously writes compressed bytes to the underlying GZip stream from the specified byte array.

Asynchronously writes a sequence of bytes to the current stream, advances the current position within this stream by the number of bytes written, and monitors cancellation requests. Asynchronously writes compressed bytes to the underlying GZip stream from the specified read-only byte memory region. Writes a byte to the current position in the stream and advances the position within the stream by one byte.

Converts a managed stream in the. Skip to main content. Exit focus mode. Compression Assembly: System. Is this page helpful? Yes No. Any additional feedback? Skip Submit. Gets a value indicating whether the stream supports reading while decompressing a file. Gets a value that determines whether the current stream can time out. Inherited from Stream. CopyTo Stream. Reads the bytes from the current stream and writes them to another stream. CopyTo Stream, Int CopyToAsync Stream.

Asynchronously reads the bytes from the current stream and writes them to another stream. CopyToAsync Stream, Int CreateObjRef Type. Inherited from MarshalByRefObject. Dispose Boolean.

EndRead IAsyncResult. EndWrite IAsyncResult. Equals Object. Determines whether the specified object is equal to the current object. Inherited from Object. FlushAsync CancellationToken. Serves as the default hash function. Obtains a lifetime service object to control the lifetime policy for this instance. MemberwiseClone Boolean. Read Byte[], Int32, Int ReadAsync Byte[], Int32, Int Seek Int64, SeekOrigin. SetLength Int Returns a string that represents the current object.

Write Byte[], Int32, Int WriteAsync Byte[], Int32, Int WriteByte Byte.

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Compress and Decompress data using GZipStream

It saves data efficiently—such as in compressed log files. We develop a utility method in the C language that uses the System. Compression namespace. It creates GZIP files. It writes them to the disk. Here we will use the.

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C# GZipStream Example

Reads a sequence of bytes from the current GZip stream into a byte span and advances the position within the GZip stream by the number of bytes read. A region of memory. When this method returns, the contents of this region are replaced by the bytes read from the current source. The total number of bytes read into the buffer. This can be less than the number of bytes allocated in the buffer if that many bytes are not currently available, or zero 0 if the end of the stream has been reached. Use the CanRead property to determine whether the current instance supports reading.

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

Provides methods and properties used to compress and decompress streams by using the GZip data format specification. The following example shows how to use the GZipStream class to compress and decompress a directory of files. This class represents the gzip data format, which uses an industry-standard algorithm for lossless file compression and decompression. The format includes a cyclic redundancy check value for detecting data corruption. The gzip data format uses the same algorithm as the DeflateStream class, but can be extended to use other compression formats.

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