Class ZipArchive

Represents zip archive.

Inheritance

System.Object

ZipArchive

Implements

System.IDisposable

Namespace: Syncfusion.Compression.Zip

Assembly: Syncfusion.Compression.Portable.dll

Syntax

public class ZipArchive : Object, IDisposable

Constructors

ZipArchive()

Declaration

public ZipArchive()

Fields

CreateCompressor

Creates compressor.

Declaration

public ZipArchive.CompressorCreator CreateCompressor

Field Value

Type
ZipArchive.CompressorCreator

Properties

CheckCrc

Indicates whether we should check Crc value when reading item's data. Check is performed when user gets access to item's decompressed data for the first time.

Declaration

public bool CheckCrc { get; set; }

Property Value

Type
System.Boolean

Count

Returns number of items inside archive. Read-only.

Declaration

public int Count { get; }

Property Value

Type
System.Int32

DefaultCompressionLevel

Gets / sets default compression level - compression level for new items. By default is equal to CompressionLevel.Best.

Declaration

public CompressionLevel DefaultCompressionLevel { get; set; }

Property Value

Type
CompressionLevel

EncryptionAlgorithm

Returns the encryption algorithm used. Default value is NONE.

Declaration

public EncryptionAlgorithm EncryptionAlgorithm { get; }

Property Value

Type
EncryptionAlgorithm

FileNamePreprocessor

Gets / sets file name preprocessor - object that converts full file/folder name into value that will be written into zip archive.

Declaration

public IFileNamePreprocessor FileNamePreprocessor { get; set; }

Property Value

Type
IFileNamePreprocessor

Item[Int32]

Returns single archive item from the collection. Read-only.

Declaration

public ZipArchiveItem this[int index] { get; }

Parameters

Type	Name	Description
System.Int32	index	Zero-based index of the item to return.

Property Value

Type	Description
ZipArchiveItem	Single archive item from the collection.

Item[String]

Returns item by its name. Null if item wasn't found. Read-only.

Declaration

public ZipArchiveItem this[string itemName] { get; }

Parameters

Type	Name	Description
System.String	itemName

Property Value

Type
ZipArchiveItem

Items

Returns the items inside archive. Read-only.

Declaration

public ZipArchiveItem[] Items { get; }

Property Value

Type
ZipArchiveItem[]

UseNetCompression

Uses custom compressed stream reader and writer.

Declaration

public bool UseNetCompression { get; set; }

Property Value

Type
System.Boolean

Methods

add_OnZipArchiveItemPasswordNeeded(ZipArchive.ZipArchiveItemPasswordEventHandler)

Declaration

public void add_OnZipArchiveItemPasswordNeeded(ZipArchive.ZipArchiveItemPasswordEventHandler value)

Parameters

Type	Name	Description
ZipArchive.ZipArchiveItemPasswordEventHandler	value

AddItem(ZipArchiveItem)

Adds existing item to the archive.

Declaration

public ZipArchiveItem AddItem(ZipArchiveItem item)

Parameters

Type	Name	Description
ZipArchiveItem	item	Item to add.

Returns

Type	Description
ZipArchiveItem	Added item.

AddItem(String, Stream, Boolean, FileAttributes)

Adds new item to the archive

Declaration

public ZipArchiveItem AddItem(string itemName, Stream data, bool bControlStream, FileAttributes attributes)

Parameters

Type	Name	Description
System.String	itemName	Item name to add.
System.IO.Stream	data	Items data stream (can be null for empty files or folders).
System.Boolean	bControlStream	Indicates whether ZipArchive is responsible for stream closing.
FileAttributes	attributes	File attributes.

Returns

Type	Description
ZipArchiveItem	Item that has been added.

AddItem(String, Stream, Boolean, FileAttributes, String)

Adds a new item in the zip archive with the specified name and password.

Declaration

public ZipArchiveItem AddItem(string itemName, Stream data, bool bControlStream, FileAttributes attributes, string password)

Parameters

Type	Name	Description
System.String	itemName	Item name to add.
System.IO.Stream	data	Items data stream (can be null for empty files or folders).
System.Boolean	bControlStream	Indicates whether ZipArchive is responsible for stream closing.
FileAttributes	attributes	File attributes.
System.String	password	Item or file password

Returns

Type	Description
ZipArchiveItem	Item that has been added.

Clone()

Creates a copy of the current instance.

Declaration

public ZipArchive Clone()

Returns

Type	Description
ZipArchive	A copy of the current instance.

Close()

Clears all internal data.

Declaration

public void Close()

Dispose()

A method to release allocated unmanaged resources.

Declaration

public void Dispose()

Finalize()

Class finilizer.

Declaration

protected override void Finalize()

Find(String)

Searches for the item with specified name.

Declaration

public int Find(string itemName)

Parameters

Type	Name	Description
System.String	itemName	Item to find.

Returns

Type	Description
System.Int32	Zero-based item index if found; -1 otherwise.

Find(Regex)

Searches for the item with specified name.

Declaration

public int Find(Regex itemRegex)

Parameters

Type	Name	Description
System.Text.RegularExpressions.Regex	itemRegex	Regular expression that defines item to find.

Returns

Type	Description
System.Int32	Zero-based item index if found; -1 otherwise.

FindValueFromEnd(Stream, UInt32, Int32)

Searches for integer value from the end of the stream.

Declaration

public static long FindValueFromEnd(Stream stream, uint value, int maxCount)

Parameters

Type	Name	Description
System.IO.Stream	stream	Stream to search value in.
System.UInt32	value	Value to locate.
System.Int32	maxCount	Maximum number of bytes to scan.

Returns

Type	Description
System.Int64	Offset to the value, or -1 if it wasn't found.

Open(Stream, Boolean)

Reads archive data from the stream. In the current implementation stream must be seekable and readable to extract data.

Declaration

public void Open(Stream stream, bool closeStream)

Parameters

Type	Name	Description
System.IO.Stream	stream	Stream to read data from.
System.Boolean	closeStream	Indicates whether method should close stream after reading.

Open(Stream, Boolean, String)

Reads archive data from the stream. In the current implementation stream must be seekable and readable to extract data.

Declaration

public void Open(Stream stream, bool closeStream, string password)

Parameters

Type	Name	Description
System.IO.Stream	stream	Stream to read data from.
System.Boolean	closeStream	Indicates whether method should close stream after reading.
System.String	password	Password for the file to open.

Protect(String, EncryptionAlgorithm)

Protects the archived file with password using specified algorithm.

Declaration

public void Protect(string password, EncryptionAlgorithm type)

Parameters

Type	Name	Description
System.String	password	Password to protect.
EncryptionAlgorithm	type	Type of encryption algorithm to be used.

ReadInt16(Stream)

Extracts Int16 value from the stream.

Declaration

public static short ReadInt16(Stream stream)

Parameters

Type	Name	Description
System.IO.Stream	stream	Stream to read data from.

Returns

Type	Description
System.Int16	Extracted value.

ReadInt32(Stream)

Extracts Int32 value from the stream.

Declaration

public static int ReadInt32(Stream stream)

Parameters

Type	Name	Description
System.IO.Stream	stream	Stream to read data from.

Returns

Type	Description
System.Int32	Extracted value.

ReadUInt16(Stream)

Extracts unsigned Int16 value from the stream.

Declaration

public static ushort ReadUInt16(Stream stream)

Parameters

Type	Name	Description
System.IO.Stream	stream	Stream to read data from.

Returns

Type	Description
System.UInt16	Extracted value.

Remove(Regex)

Removes items that matches specified regular expression from the collection.

Declaration

public void Remove(Regex mask)

Parameters

Type	Name	Description
System.Text.RegularExpressions.Regex	mask	Regular expression used to decide whether to remove item or not.

remove_OnZipArchiveItemPasswordNeeded(ZipArchive.ZipArchiveItemPasswordEventHandler)

Declaration

public void remove_OnZipArchiveItemPasswordNeeded(ZipArchive.ZipArchiveItemPasswordEventHandler value)

Parameters

Type	Name	Description
ZipArchive.ZipArchiveItemPasswordEventHandler	value

RemoveAt(Int32)

Removes item at the specified position.

Declaration

public void RemoveAt(int index)

Parameters

Type	Name	Description
System.Int32	index	Item index to remove.

RemoveItem(String)

Removes item from the archive.

Declaration

public void RemoveItem(string itemName)

Parameters

Type	Name	Description
System.String	itemName	Item name to remove.

Save(Stream, Boolean)

Saves archive into specified stream.

Declaration

public void Save(Stream stream, bool closeStream)

Parameters

Type	Name	Description
System.IO.Stream	stream	Output stream.
System.Boolean	closeStream	Indicates whether method should close stream after saving.

UnProtect()

Removes password from the compressed file.

Declaration

public void UnProtect()

UpdateItem(String, Byte[])

Updates item inside existing archive.

Declaration

public void UpdateItem(string itemName, byte[] newData)

Parameters

Type	Name	Description
System.String	itemName	Item name to update.
System.Byte[]	newData	New data for the item.

UpdateItem(String, Stream, Boolean)

Updates item inside existing archive.

Declaration

public void UpdateItem(string itemName, Stream newDataStream, bool controlStream)

Parameters

Type	Name	Description
System.String	itemName	Item name to update.
System.IO.Stream	newDataStream	New data for the item.
System.Boolean	controlStream	Indicates whether item should control its stream after update.

UpdateItem(String, Stream, Boolean, FileAttributes)

Updates existing item or creates new one.

Declaration

public void UpdateItem(string itemName, Stream newDataStream, bool controlStream, FileAttributes attributes)

Parameters

Type	Name	Description
System.String	itemName	Item to update or create.
System.IO.Stream	newDataStream	New data for the item.
System.Boolean	controlStream	Indicates whether item should control its stream after update.
FileAttributes	attributes	File attributes for the item. This argument is only used if item is created.

Events

OnZipArchiveItemPasswordNeeded

An event is raised when a unique password is required for the ZipArchiveItem. The event provides the file name and expects the handler to supply the password.

Declaration

public event ZipArchive.ZipArchiveItemPasswordEventHandler OnZipArchiveItemPasswordNeeded

Event Type

Type
ZipArchive.ZipArchiveItemPasswordEventHandler

Implements

System.IDisposable