ZipEntry Excel Class Module Reference Documentation

ZipEntry

Current Version: 9.5.0.80

Represents a single file or directory entry within a Chilkat Zip object. A zip entry can be one of 5 types (see the description of the EntryType property below).

Object Creation

Dim oZipEntry As Chilkat.ZipEntry
Set oZipEntry = Chilkat.NewZipEntry

Properties

Comment
Comment As String

The comment stored within the Zip for this entry.

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CompressedLength
CompressedLength As Long (read only)

The size in bytes of this entry's file data when compression is applied

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CompressedLengthStr
CompressedLengthStr As String (read only)

The size in decimal string format of this file when Zip compression is applied.

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CompressionLevel
CompressionLevel As Long

The compression level. 0 = no compression, while 9 = maximum compression. The default is 6.

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CompressionMethod
CompressionMethod As Long

Set to 0 for no compression, or 8 for the Deflate algorithm. The Deflate algorithm is the default algorithm of the most popular Zip utility programs, such as WinZip

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Crc
Crc As Long (read only)

The CRC for the zip entry. For AES encrypted entries, the CRC value will be 0. (See http://www.winzip.com/aes_info.htm#CRC )

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DebugLogFilePath
DebugLogFilePath As String

If set to a file path, causes each Chilkat method or property call to automatically append it's LastErrorText to the specified log file. The information is appended such that if a hang or crash occurs, it is possible to see the context in which the problem occurred, as well as a history of all Chilkat calls up to the point of the problem. The VerboseLogging property can be set to provide more detailed information.

This property is typically used for debugging the rare cases where a Chilkat method call hangs or generates an exception that halts program execution (i.e. crashes). A hang or crash should generally never happen. The typical causes of a hang are:

  1. a timeout related property was set to 0 to explicitly indicate that an infinite timeout is desired,
  2. the hang is actually a hang within an event callback (i.e. it is a hang within the application code), or
  3. there is an internal problem (bug) in the Chilkat code that causes the hang.

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EncryptionKeyLen
EncryptionKeyLen As Long (read only)
Introduced in version 9.5.0.69

If this entry is AES encrypted, then this property contains the AES key length (128, 192, or 256). If the entry is not AES encrypted, then the value is 0.

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EntryID
EntryID As Long (read only)

The unique ID assigned by Zip.NET while the object is instantiated in memory.

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EntryType
EntryType As Long (read only)

Indicates the origin of the entry. There are three possible values:

  1. Mapped Entry: An entry in an existing Zip file.
  2. File Entry: A file not yet in memory, but referenced. These entries are added by calling AppendFiles, AppendFilesEx, AppendOneFileOrDir, etc.
  3. Data Entry: An entry containing uncompressed data from memory. These entries are added by calling AppendData, AppendString, etc.
  4. Null Entry: An entry that no longer exists in the .zip.
  5. New Directory Entry: A directory entry added by calling AppendNewDir.
When the zip is written by calling WriteZip or WriteToMemory, all of the zip entries are transformed into mapped entries. They become entries that contain the compressed data within the .zip that was just created. (The WriteZip method call effectively writes the zip and then opens it, replacing all of the existing entries with mapped entries.)

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FileDateTimeStr
FileDateTimeStr As String

The local last-modified date/time in RFC822 string format.

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FileName
FileName As String

The file name of the Zip entry.

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FileNameHex
FileNameHex As String (read only)

A string containing the hex encoded raw filename bytes found in the Zip entry.

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IsAesEncrypted
IsAesEncrypted As Long (read only)
Introduced in version 9.5.0.69

True if the entry is AES encrypted. This property can only be True for entries already contained in a .zip (i.e. entries obtained from a zip archive that was opened via OpenZip, OpenBd, OpenFromMemory, etc.) The property is False if the entry contained in the zip is not AES encrypted.

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IsDirectory
IsDirectory As Long (read only)

True if the Zip entry is a directory, false if it is a file.

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LastErrorHtml
LastErrorHtml As String (read only)

Provides information in HTML format about the last method/property called. If a method call returns a value indicating failure, or behaves unexpectedly, examine this property to get more information.

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LastErrorText
LastErrorText As String (read only)

Provides information in plain-text format about the last method/property called. If a method call returns a value indicating failure, or behaves unexpectedly, examine this property to get more information.

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LastErrorXml
LastErrorXml As String (read only)

Provides information in XML format about the last method/property called. If a method call returns a value indicating failure, or behaves unexpectedly, examine this property to get more information.

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LastMethodSuccess
LastMethodSuccess As Long
Introduced in version 9.5.0.52

Indicate whether the last method call succeeded or failed. A value of True indicates success, a value of False indicates failure. This property is automatically set for method calls. It is not modified by property accesses. The property is automatically set to indicate success for the following types of method calls:

  • Any method that returns a string.
  • Any method returning a Chilkat object, binary bytes, or a date/time.
  • Any method returning a standard boolean status value where success = True and failure = False.
  • Any method returning an integer where failure is defined by a return value less than zero.

Note: Methods that do not fit the above requirements will always set this property equal to True. For example, a method that returns no value (such as a "void" in C++) will technically always succeed.

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TextFlag
TextFlag As Long

Controls whether the "text flag" of the internal file attributes for this entry within the zip is set. This is a bit flag that indicates whether the file contents are text or binary. It is for informational use and it is not imperative that this bit flag is accurately set. The ability to set this bit flag is only provided to satisfy certain cases where another application might be sensitive to the flag.

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UncompressedLength
UncompressedLength As Long (read only)

The size in bytes of this entry's file data when uncompressed.

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UncompressedLengthStr
UncompressedLengthStr As String (read only)

The size in bytes (in decimal string format) of this zip entry's data when uncompressed.

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VerboseLogging
VerboseLogging As Long

If set to True, then the contents of LastErrorText (or LastErrorXml, or LastErrorHtml) may contain more verbose information. The default value is False. Verbose logging should only be used for debugging. The potentially large quantity of logged information may adversely affect peformance.

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Version
Version As String (read only)

Version of the component/library, such as "9.5.0.63"

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Methods

AppendString
AppendString(strContent As String, charset As String) As Long

Appends text data to the zip entry's file contents. The text is appended using the character encoding specified by the charset, which can be "utf-8", "ansi", etc.

Returns True for success, False for failure.

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CopyToBase64
CopyToBase64() As String

Returns the compressed data as a Base64-encoded string. It is only possible to retrieve the compressed data from a pre-existing .zip that has been opened or after writing the .zip but not closing it.

Note: The CopyToBase64 method can only be called if the zip entry already contains compressed data (i.e. it is a "mapped entry").

Returns Nothing on failure

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CopyToHex
CopyToHex() As String

Returns the compressed data as a hexidecimal encoded string. It is only possible to retrieve the compressed data from a pre-existing .zip that has been opened or after writing the .zip but not closing it.

Note: The CopyToBase64 method can only be called if the zip entry already contains compressed data (i.e. it is a "mapped entry").

Returns Nothing on failure

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Extract
Extract(dirPath As String) As Long

Unzips this entry into the specified base directory. The file is unzipped to the subdirectory according to the relative path stored with the entry in the Zip. Use ExtractInto to unzip into a specific directory regardless of the path information stored in the Zip.

Returns True for success, False for failure.

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ExtractInto
ExtractInto(dirPath As String) As Long

Unzip a file into a specific directory. If this entry is a directory, then nothing occurs. (An application can check the IsDirectory property and instead call Extract if it is desired to create the directory. )

Returns True for success, False for failure.

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GetDt
GetDt() As CkDateTime

Returns the last-modified date/time of this zip entry.

Returns Nothing on failure

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NextEntry
NextEntry() As ZipEntry

Return the next entry (file or directory) within the Zip

Returns Nothing on failure

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NextMatchingEntry
NextMatchingEntry(matchStr As String) As ZipEntry
Introduced in version 9.5.0.50

Returns the next entry having a filename matching the matchStr. The "*" characters matches 0 or more of any character. The full filename, including path, is used when matching against the pattern.

Returns Nothing on failure

More Information and Examples
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ReplaceString
ReplaceString(strContent As String, charset As String) As Long

Replaces the zip entry's existing contents with new text data. The text will be stored using the character encoding as specified by charset, which can be "utf-8", "ansi", etc.

Returns True for success, False for failure.

More Information and Examples
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SetDt
SetDt(dt As CkDateTime)

Sets the last-modified date/time for this zip entry.

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UnzipToBd
UnzipToBd(binData As BinData) As Long
Introduced in version 9.5.0.67

Unzips the entry contents into the binData.

Returns True for success, False for failure.

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UnzipToSb
UnzipToSb(lineEndingBehavior As Long, srcCharset As String, sb As StringBuilder) As Long
Introduced in version 9.5.0.67

Unzips a text file to the sb. The contents of sb are appended with the unzipped file. The lineEndingBehavior is as follows:

0 = leave unchanged.
1 = convert all to bare LF's
2 = convert all to CRLF's

The srcCharset tells the component how to interpret the bytes of the uncompressed file -- i.e. as utf-8, utf-16, windows-1252, etc.

Returns True for success, False for failure.

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UnzipToStream
UnzipToStream(toStream As Stream) As Long
Introduced in version 9.5.0.67

Unzips a file within a Zip to a stream. If called synchronously, the toStream must have a sink, such as a file or another stream object. If called asynchronously, then the foreground thread can read the stream.

Returns True for success, False for failure.

More Information and Examples
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UnzipToString
UnzipToString(lineEndingBehavior As Long, srcCharset As String) As String

Inflate and return the uncompressed data as a string The lineEndingBehavior is as follows:

0 = leave unchanged.
1 = convert all to bare LF's
2 = convert all to CRLF's

The srcCharset tells the component how to interpret the bytes of the uncompressed file -- i.e. as utf-8, utf-16, windows-1252, etc.

Returns Nothing on failure

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