Xceed .NET Libraries Documentation
Xceed.Zip Assembly / Xceed.Zip Namespace / ZippedFile Class / CompressionMethod Property


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    CompressionMethod Property (ZippedFile)
    In This Topic
    Gets the CompressionMethod that was used to compress the file.
    Syntax
    'Declaration
     
    Public Overridable Property CompressionMethod As CompressionMethod
    'Usage
     
    Dim instance As ZippedFile
    Dim value As CompressionMethod
     
    instance.CompressionMethod = value
     
    value = instance.CompressionMethod
    public virtual CompressionMethod CompressionMethod {get; set;}

    Property Value

    A value indicating the CompressionMethod that was used to compress the file.
    Remarks

    The PPMd algorithm uses a custom memory management system called SubAllocator. In a zip file, the memory size the SubAllocator uses is defined in the WinZip PPMd header for the compressed file and this header's value is used when decompressing the data. In general, WinZip uses 64Mb. Since the algorithm used was not optimized from the original PPMd version I revision 1, the SubAllocator initially requires the total amount of memory specified in the PPMd compressor. This means you must have at least 64 free Mb of RAM when using this compression method.

    Requirements

    Target Platforms: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

    See Also