Write Method
See Also  Example
Xceed.Compression.Formats Assembly > Xceed.Compression.Formats Namespace > FormattedCompressedStream Class : Write Method

buffer
An array of bytes. This method copies count bytes from buffer to the current stream.
offset
The zero-based byte offset in buffer at which to begin copying bytes to the current stream.
count
The number of bytes to be written to the current stream.
Writes a sequence of bytes to the current stream and advances the current position within this stream by the number of bytes written.

Syntax

Visual Basic (Declaration) 
Overrides Public Sub Write( _
   ByVal buffer() As Byte, _
   ByVal offset As Integer, _
   ByVal count As Integer _
)
C# 
public override void Write( 
   byte[] buffer,
   int offset,
   int count
)

Parameters

buffer
An array of bytes. This method copies count bytes from buffer to the current stream.
offset
The zero-based byte offset in buffer at which to begin copying bytes to the current stream.
count
The number of bytes to be written to the current stream.

Example

The following example demonstrates how to read data from a FileStream and compress it to a MemoryStream using the GZipCompressedStream class.
Visual BasicCopy Code
Imports System.IO
Imports Xceed.Compression
Imports Xceed.Compression.Formats

Dim sourceStream As New FileStream("d:\data.txt", FileMode.Open)

' If you do not want the inner stream to be closed by the GZipCompressedStream
' then set the GZipCompressedStream's Transient property to true.

Dim destinationStream As New MemoryStream()
Dim gzip As New GZipCompressedStream(destinationStream)

'32K at a time.
Dim buffer(32768) As Byte
Dim bytesRead As Integer = 0

' Loop until we have nothing more to read from the source stream.
Do
      bytesRead = sourceStream.Read(buffer, 0, buffer.Length)

      If bytesRead > 0 Then
            gzip.Write(buffer, 0, bytesRead)
      End If
Loop Until bytesRead = 0

' Close the source stream and the GZipCompressedStream.
'
' Because the GZipCompressedStream will automatically close the destination
' memory stream, there is no need to call Close once we are done with the stream.

sourceStream.Close()
gzip.Close()

' To get access to the MemoryStream's compressed data, you can use
' Dim compressedData() As Byte = destinationStream.ToArray()
' ToArray() works even when the memory stream is closed.
C#Copy Code
using System.IO;
using Xceed.Compression;
using Xceed.Compression.Formats;

using( FileStream sourceStream = new FileStream( @"d:\data.txt", FileMode.Open ) )
{
     // Because the GZipCompressedStream will automatically close the destination
     // memory stream, there is no need to declare the memory stream within a using
     // statement or to call Close once we are done with the stream.
     //
     // If you do not want the inner stream to be closed by the GZipCompressedStream
     // then set the GZipCompressedStream's Transient property to true.
     
     MemoryStream destinationStream = new MemoryStream();
     
     using( GZipCompressedStream gzip = new GZipCompressedStream( destinationStream ) )
     {
           // 32K at a time.
           byte[] buffer = new byte[ 32768 ];
           int bytesRead = 0;
           
           // Loop until we have nothing more to read from the source stream.
           while( ( bytesRead = sourceStream.Read( buffer, 0, buffer.Length  ) ) > 0 )
           {
                 gzip.Write( buffer, 0, bytesRead );
           }
     }
     
     // To get access to the MemoryStream's compressed data, you can use
     // byte[] compressedData = destinationStream.ToArray();
     // ToArray() works even when the memory stream is closed.
}

Remarks

Use the CanWrite property to determine whether the current instance supports writing.

If the write operation is successful, the position within the stream advances by the number of bytes written. If an exception occurs, the position within the stream remains unchanged.

Requirements

Target Platforms: Windows 2000 Service Pack 3; Windows 98; Windows 98 Second Edition; Windows ME; Windows Server 2003; Windows Vista Business; Windows Vista Business 64-bit edition; Windows Vista Enterprise; Windows Vista Enterprise 64-bit edition; Windows Vista Home Basic; Windows Vista Home Basic 64-bit edition; Windows Vista Home Premium; Windows Vista Home Premium 64-bit edition; Windows Vista Starter; Windows Vista Ultimate; Windows Vista Ultimate 64-bit edition; Windows XP Service Pack 2

Supported Frameworks: Microsoft .NET Framework version 2.0; Microsoft .NET Framework version 3.0

See Also