Class ZipFile

This class represents a Zip archive. You can ask for the contained entries, or get an input stream for a file entry. The entry is automatically decompressed.

You can also update the archive adding or deleting entries.

This class is thread safe for input: You can open input streams for arbitrary entries in different threads.

Author of the original java version : Jochen Hoenicke

Inheritance

System.Object

ZipFile

Implements

System.Collections.IEnumerable

System.IDisposable

Inherited Members

System.Object.Equals(System.Object)

System.Object.Equals(System.Object, System.Object)

System.Object.GetHashCode()

System.Object.GetType()

System.Object.MemberwiseClone()

System.Object.ReferenceEquals(System.Object, System.Object)

System.Object.ToString()

Namespace: ICSharpCode.SharpZipLib.Zip

Assembly: ICSharpCode.SharpZipLib.dll

Syntax

public class ZipFile : IEnumerable, IDisposable

Examples

using System;
using System.Text;
using System.Collections;
using System.IO;

using ICSharpCode.SharpZipLib.Zip;

class MainClass
{
    static public void Main(string[] args)
    {
        using (ZipFile zFile = new ZipFile(args[0])) {
            Console.WriteLine("Listing of : " + zFile.Name);
            Console.WriteLine("");
            Console.WriteLine("Raw Size    Size      Date     Time     Name");
            Console.WriteLine("--------  --------  --------  ------  ---------");
            foreach (ZipEntry e in zFile) {
                if ( e.IsFile ) {
                    DateTime d = e.DateTime;
                    Console.WriteLine("{0, -10}{1, -10}{2}  {3}   {4}", e.Size, e.CompressedSize,
                        d.ToString("dd-MM-yy"), d.ToString("HH:mm"),
                        e.Name);
                }
            }
        }
    }
}

Constructors

ZipFile(FileStream)

Opens a Zip file reading the given System.IO.FileStream.

Declaration

public ZipFile(FileStream file)

Parameters

Type	Name	Description
System.IO.FileStream	file	The System.IO.FileStream to read archive data from.

Exceptions

Type	Condition
System.ArgumentNullException	The supplied argument is null.
System.IO.IOException	An i/o error occurs.
ZipException	The file doesn't contain a valid zip archive.

ZipFile(FileStream, Boolean)

Opens a Zip file reading the given System.IO.FileStream.

Declaration

public ZipFile(FileStream file, bool leaveOpen)

Parameters

Type	Name	Description
System.IO.FileStream	file	The System.IO.FileStream to read archive data from.
System.Boolean	leaveOpen	true to leave the System.IO.FileStream open when the ZipFile is disposed, false to dispose of it

Exceptions

Type	Condition
System.ArgumentNullException	The supplied argument is null.
System.IO.IOException	An i/o error occurs.
ZipException	The file doesn't contain a valid zip archive.

ZipFile(Stream)

Opens a Zip file reading the given System.IO.Stream.

Declaration

public ZipFile(Stream stream)

Parameters

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

Exceptions

Type	Condition
System.IO.IOException	An i/o error occurs
ZipException	The stream doesn't contain a valid zip archive.
System.ArgumentException	The System.IO.Stream doesnt support seeking.
System.ArgumentNullException	The System.IO.Stream argument is null.

ZipFile(Stream, Boolean)

Opens a Zip file reading the given System.IO.Stream.

Declaration

public ZipFile(Stream stream, bool leaveOpen)

Parameters

Type	Name	Description
System.IO.Stream	stream	The System.IO.Stream to read archive data from.
System.Boolean	leaveOpen	true to leave the System.IO.Stream open when the ZipFile is disposed, false to dispose of it

Exceptions

Type	Condition
System.IO.IOException	An i/o error occurs
ZipException	The stream doesn't contain a valid zip archive.
System.ArgumentException	The System.IO.Stream doesnt support seeking.
System.ArgumentNullException	The System.IO.Stream argument is null.

ZipFile(String, StringCodec)

Opens a Zip file with the given name for reading.

Declaration

public ZipFile(string name, StringCodec stringCodec = null)

Parameters

Type	Name	Description
System.String	name	The name of the file to open.
StringCodec	stringCodec

Exceptions

Type	Condition
System.ArgumentNullException	The argument supplied is null.
System.IO.IOException	An i/o error occurs
ZipException	The file doesn't contain a valid zip archive.

Fields

KeysRequired

Event handler for handling encryption keys.

Declaration

public ZipFile.KeysRequiredEventHandler KeysRequired

Field Value

Type	Description
ZipFile.KeysRequiredEventHandler

Properties

BufferSize

Get /set the buffer size to be used when updating this zip file.

Declaration

public int BufferSize { get; set; }

Property Value

Type	Description
System.Int32

Count

Get the number of entries contained in this ZipFile.

Declaration

public long Count { get; }

Property Value

Type	Description
System.Int64

EntryByIndex[Int32]

Indexer property for ZipEntries

Declaration

public ZipEntry this[int index] { get; }

Parameters

Type	Name	Description
System.Int32	index

Property Value

Type	Description
ZipEntry

EntryFactory

Get/set the IEntryFactory used to generate ZipEntry values during updates.

Declaration

public IEntryFactory EntryFactory { get; set; }

Property Value

Type	Description
IEntryFactory

IsEmbeddedArchive

Get a value indicating whether this archive is embedded in another file or not.

Declaration

public bool IsEmbeddedArchive { get; }

Property Value

Type	Description
System.Boolean

IsNewArchive

Get a value indicating that this archive is a new one.

Declaration

public bool IsNewArchive { get; }

Property Value

Type	Description
System.Boolean

IsStreamOwner

Get/set a flag indicating if the underlying stream is owned by the ZipFile instance. If the flag is true then the stream will be closed when Close is called.

Declaration

public bool IsStreamOwner { get; set; }

Property Value

Type	Description
System.Boolean

Remarks

The default value is true in all cases.

IsUpdating

Get a value indicating an update has been started.

Declaration

public bool IsUpdating { get; }

Property Value

Type	Description
System.Boolean

Name

Gets the name of this zip file.

Declaration

public string Name { get; }

Property Value

Type	Description
System.String

NameTransform

Get / set the INameTransform to apply to names when updating.

Declaration

public INameTransform NameTransform { get; set; }

Property Value

Type	Description
INameTransform

Password

Password to be used for encrypting/decrypting files.

Declaration

public string Password { set; }

Property Value

Type	Description
System.String

Remarks

Set to null if no password is required.

Size

Gets the number of entries in this zip file.

Declaration

[Obsolete("Use the Count property instead")]
public int Size { get; }

Property Value

Type	Description
System.Int32

Exceptions

Type	Condition
System.InvalidOperationException	The Zip file has been closed.

SkipLocalEntryTestsOnLocate

Skip the verification of the local header when reading an archive entry. Set this to attempt to read the entries even if the headers should indicate that doing so would fail or produce an unexpected output.

Declaration

public bool SkipLocalEntryTestsOnLocate { get; set; }

Property Value

Type	Description
System.Boolean

StringCodec

Utility class for resolving the encoding used for reading and writing strings

Declaration

public StringCodec StringCodec { get; set; }

Property Value

Type	Description
StringCodec

UseZip64

Get / set a value indicating how Zip64 Extension usage is determined when adding entries.

Declaration

public UseZip64 UseZip64 { get; set; }

Property Value

Type	Description
UseZip64

ZipCryptoEncoding

The encoding used for the ZipCrypto passwords. Defaults to DefaultZipCryptoEncoding.

Declaration

public Encoding ZipCryptoEncoding { get; set; }

Property Value

Type	Description
System.Text.Encoding

ZipFileComment

Gets the comment for the zip file.

Declaration

public string ZipFileComment { get; }

Property Value

Type	Description
System.String

Methods

AbortUpdate()

Abort updating leaving the archive unchanged.

Declaration

public void AbortUpdate()

See Also

BeginUpdate()

CommitUpdate()

Add(IStaticDataSource, ZipEntry)

Add a ZipEntry with data.

Declaration

public void Add(IStaticDataSource dataSource, ZipEntry entry)

Parameters

Type	Name	Description
IStaticDataSource	dataSource	The source of the data for this entry.
ZipEntry	entry	The entry to add.

Remarks

This can be used to add file entries with a custom data source.

Exceptions

Type	Condition
System.NotSupportedException	The encryption method specified in entry is unsupported.
System.NotImplementedException	Compression method is not supported for creating entries.

Add(IStaticDataSource, String)

Add a file entry with data.

Declaration

public void Add(IStaticDataSource dataSource, string entryName)

Parameters

Type	Name	Description
IStaticDataSource	dataSource	The source of the data for this entry.
System.String	entryName	The name to give to the entry.

Add(IStaticDataSource, String, CompressionMethod)

Add a file entry with data.

Declaration

public void Add(IStaticDataSource dataSource, string entryName, CompressionMethod compressionMethod)

Parameters

Type	Name	Description
IStaticDataSource	dataSource	The source of the data for this entry.
System.String	entryName	The name to give to the entry.
CompressionMethod	compressionMethod	The compression method to use.

Exceptions

Type	Condition
System.NotImplementedException	Compression method is not supported for creating entries.

Add(IStaticDataSource, String, CompressionMethod, Boolean)

Add a file entry with data.

Declaration

public void Add(IStaticDataSource dataSource, string entryName, CompressionMethod compressionMethod, bool useUnicodeText)

Parameters

Type	Name	Description
IStaticDataSource	dataSource	The source of the data for this entry.
System.String	entryName	The name to give to the entry.
CompressionMethod	compressionMethod	The compression method to use.
System.Boolean	useUnicodeText	Ensure Unicode text is used for name and comments for this entry.

Exceptions

Type	Condition
System.NotImplementedException	Compression method is not supported for creating entries.

Add(ZipEntry)

Add a ZipEntry that contains no data.

Declaration

public void Add(ZipEntry entry)

Parameters

Type	Name	Description
ZipEntry	entry	The entry to add.

Remarks

This can be used to add directories, volume labels, or empty file entries.

Add(String)

Add a file to the archive.

Declaration

public void Add(string fileName)

Parameters

Type	Name	Description
System.String	fileName	The name of the file to add.

Exceptions

Type	Condition
System.ArgumentNullException	Argument supplied is null.

Add(String, CompressionMethod)

Add a new entry to the archive.

Declaration

public void Add(string fileName, CompressionMethod compressionMethod)

Parameters

Type	Name	Description
System.String	fileName	The name of the file to add.
CompressionMethod	compressionMethod	The compression method to use.

Exceptions

Type	Condition
System.ArgumentNullException	ZipFile has been closed.
System.NotImplementedException	Compression method is not supported for creating entries.

Add(String, CompressionMethod, Boolean)

Add a new entry to the archive.

Declaration

public void Add(string fileName, CompressionMethod compressionMethod, bool useUnicodeText)

Parameters

Type	Name	Description
System.String	fileName	The name of the file to add.
CompressionMethod	compressionMethod	The compression method to use.
System.Boolean	useUnicodeText	Ensure Unicode text is used for name and comment for this entry.

Exceptions

Type	Condition
System.ArgumentNullException	Argument supplied is null.
System.ObjectDisposedException	ZipFile has been closed.
System.NotImplementedException	Compression method is not supported for creating entries.

Add(String, String)

Add a file to the archive.

Declaration

public void Add(string fileName, string entryName)

Parameters

Type	Name	Description
System.String	fileName	The name of the file to add.
System.String	entryName	The name to use for the ZipEntry on the Zip file created.

Exceptions

Type	Condition
System.ArgumentNullException	Argument supplied is null.

AddDirectory(String)

Add a directory entry to the archive.

Declaration

public void AddDirectory(string directoryName)

Parameters

Type	Name	Description
System.String	directoryName	The directory to add.

BeginUpdate()

Begin updating this ZipFile archive.

Declaration

public void BeginUpdate()

See Also

BeginUpdate(IArchiveStorage)

CommitUpdate()

AbortUpdate()

BeginUpdate(IArchiveStorage)

Begin updating to this ZipFile archive.

Declaration

public void BeginUpdate(IArchiveStorage archiveStorage)

Parameters

Type	Name	Description
IArchiveStorage	archiveStorage	The storage to use during the update.

BeginUpdate(IArchiveStorage, IDynamicDataSource)

Begin updating this ZipFile archive.

Declaration

public void BeginUpdate(IArchiveStorage archiveStorage, IDynamicDataSource dataSource)

Parameters

Type	Name	Description
IArchiveStorage	archiveStorage	The archive storage for use during the update.
IDynamicDataSource	dataSource	The data source to utilise during updating.

Exceptions

Type	Condition
System.ObjectDisposedException	ZipFile has been closed.
System.ArgumentNullException	One of the arguments provided is null
System.ObjectDisposedException	ZipFile has been closed.

Close()

Closes the ZipFile. If the stream is owned then this also closes the underlying input stream. Once closed, no further instance methods should be called.

Declaration

public void Close()

Exceptions

Type	Condition
System.IO.IOException	An i/o error occurs.

CommitUpdate()

Commit current updates, updating this archive.

Declaration

public void CommitUpdate()

Exceptions

Type	Condition
System.ObjectDisposedException	ZipFile has been closed.

See Also

BeginUpdate()

AbortUpdate()

Create(Stream)

Create a new ZipFile whose data will be stored on a stream.

Declaration

public static ZipFile Create(Stream outStream)

Parameters

Type	Name	Description
System.IO.Stream	outStream	The stream providing data storage.

Returns

Type	Description
ZipFile	Returns the newly created ZipFile

Exceptions

Type	Condition
System.ArgumentNullException	outStream
System.ArgumentException	outStream

Create(String)

Create a new ZipFile whose data will be stored in a file.

Declaration

public static ZipFile Create(string fileName)

Parameters

Type	Name	Description
System.String	fileName	The name of the archive to create.

Returns

Type	Description
ZipFile	Returns the newly created ZipFile

Exceptions

Type	Condition
System.ArgumentNullException	fileName is null

Delete(ZipEntry)

Delete a ZipEntry from the archive.

Declaration

public void Delete(ZipEntry entry)

Parameters

Type	Name	Description
ZipEntry	entry	The entry to delete.

Delete(String)

Delete an entry by name

Declaration

public bool Delete(string fileName)

Parameters

Type	Name	Description
System.String	fileName	The filename to delete

Returns

Type	Description
System.Boolean	True if the entry was found and deleted; false otherwise.

Dispose(Boolean)

Releases the unmanaged resources used by the this instance and optionally releases the managed resources.

Declaration

protected virtual void Dispose(bool disposing)

Parameters

Type	Name	Description
System.Boolean	disposing	true to release both managed and unmanaged resources; false to release only unmanaged resources.

Finalize()

Finalize this instance.

Declaration

protected void Finalize()

FindEntry(String, Boolean)

Return the index of the entry with a matching name

Declaration

public int FindEntry(string name, bool ignoreCase)

Parameters

Type	Name	Description
System.String	name	Entry name to find
System.Boolean	ignoreCase	If true the comparison is case insensitive

Returns

Type	Description
System.Int32	The index position of the matching entry or -1 if not found

Exceptions

Type	Condition
System.ObjectDisposedException	The Zip file has been closed.

GetEntry(String)

Searches for a zip entry in this archive with the given name. String comparisons are case insensitive

Declaration

public ZipEntry GetEntry(string name)

Parameters

Type	Name	Description
System.String	name	The name to find. May contain directory components separated by slashes ('/').

Returns

Type	Description
ZipEntry	A clone of the zip entry, or null if no entry with that name exists.

Exceptions

Type	Condition
System.ObjectDisposedException	The Zip file has been closed.

GetEnumerator()

Gets an enumerator for the Zip entries in this Zip file.

Declaration

public IEnumerator GetEnumerator()

Returns

Type	Description
System.Collections.IEnumerator	Returns an System.Collections.IEnumerator for this archive.

Exceptions

Type	Condition
System.ObjectDisposedException	The Zip file has been closed.

GetInputStream(ZipEntry)

Gets an input stream for reading the given zip entry data in an uncompressed form. Normally the ZipEntry should be an entry returned by GetEntry().

Declaration

public Stream GetInputStream(ZipEntry entry)

Parameters

Type	Name	Description
ZipEntry	entry	The ZipEntry to obtain a data System.IO.Stream for

Returns

Type	Description
System.IO.Stream	An input System.IO.Stream containing data for this ZipEntry

Exceptions

Type	Condition
System.ObjectDisposedException	The ZipFile has already been closed
ZipException	The compression method for the entry is unknown
System.IndexOutOfRangeException	The entry is not found in the ZipFile

GetInputStream(Int64)

Creates an input stream reading a zip entry

Declaration

public Stream GetInputStream(long entryIndex)

Parameters

Type	Name	Description
System.Int64	entryIndex	The index of the entry to obtain an input stream for.

Returns

Type	Description
System.IO.Stream	An input System.IO.Stream containing data for this entryIndex

Exceptions

Type	Condition
System.ObjectDisposedException	The ZipFile has already been closed
ZipException	The compression method for the entry is unknown
System.IndexOutOfRangeException	The entry is not found in the ZipFile

SetComment(String)

Set the file comment to be recorded when the current update is commited.

Declaration

public void SetComment(string comment)

Parameters

Type	Name	Description
System.String	comment	The comment to record.

Exceptions

Type	Condition
System.ObjectDisposedException	ZipFile has been closed.

TestArchive(Boolean)

Test an archive for integrity/validity

Declaration

public bool TestArchive(bool testData)

Parameters

Type	Name	Description
System.Boolean	testData	Perform low level data Crc check

Returns

Type	Description
System.Boolean	true if all tests pass, false otherwise

Remarks

Testing will terminate on the first error found.

TestArchive(Boolean, TestStrategy, ZipTestResultHandler)

Test an archive for integrity/validity

Declaration

public bool TestArchive(bool testData, TestStrategy strategy, ZipTestResultHandler resultHandler)

Parameters

Type	Name	Description
System.Boolean	testData	Perform low level data Crc check
TestStrategy	strategy	The TestStrategy to apply.
ZipTestResultHandler	resultHandler	The ZipTestResultHandler handler to call during testing.

Returns

Type	Description
System.Boolean	true if all tests pass, false otherwise

Exceptions

Type	Condition
System.ObjectDisposedException	The object has already been closed.

Explicit Interface Implementations

IDisposable.Dispose()

Declaration

void IDisposable.Dispose()

Implements

System.Collections.IEnumerable

System.IDisposable