Visual Basic 6.0

Find ZIP Entries Matching a Wildcard Pattern Using EntryMatching

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This example demonstrates how to use the EntryMatching method to find ZIP entries whose stored paths match a wildcard pattern.

The wildcard character * matches zero or more characters. The comparison is performed against the full stored path within the ZIP archive.

This method is useful for:

• Finding files having a particular extension
• Locating files within specific subdirectories
• Searching ZIP archives without manually iterating through every entry

Suppose the ZIP archive contains:

docs/
docs/readme.txt
docs/manual.pdf
images/logo.png
images/banner.jpg
data/config/settings.json

Notice that the ZIP archive contains an explicit directory entry named docs/. ZIP archives may optionally contain separate directory entries in addition to file entries.

When searching with the pattern docs/*, the first matching entry could therefore be the directory entry docs/ rather than a file contained within that directory.

The example searches for:

• The first .png file
• The first entry beneath the docs directory
• The first JSON file anywhere within the ZIP archive

Visual Basic 6.0

Dim success As Long
success = 0

success = 0

' Open an existing ZIP archive.
Dim zip As New ChilkatZip

success = zip.OpenZip("example.zip")
If (success = 0) Then
    Debug.Print zip.LastErrorText
    Exit Sub
End If

Dim entry As New ChilkatZipEntry

' ------------------------------------------------------------
' Find the first .png file in the ZIP archive.

success = zip.EntryMatching("*.png",entry)

If (success = 1) Then
    Debug.Print "Found PNG file:"
    Debug.Print "  " & entry.FileName
    Debug.Print ""
End If

' ------------------------------------------------------------
' Find the first entry beneath the docs directory.
' 
' Note: ZIP archives may optionally contain explicit directory
' entries such as "docs/" in addition to file entries.
' Therefore, the first matching entry could be the directory
' itself rather than a file contained within the directory.

success = zip.EntryMatching("docs/*",entry)

If (success = 1) Then
    Debug.Print "First matching docs entry:"
    Debug.Print "  " & entry.FileName
    Debug.Print "  IsDirectory = " & entry.IsDirectory
    Debug.Print ""
End If

' ------------------------------------------------------------
' Find the first JSON file anywhere in the ZIP archive.

success = zip.EntryMatching("*.json",entry)

If (success = 1) Then
    Debug.Print "Found JSON file:"
    Debug.Print "  " & entry.FileName
    Debug.Print ""
End If

' ------------------------------------------------------------
' The matching is performed against the full stored ZIP path.
' For example:
' 
'     docs/readme.txt
'     images/logo.png
'     data/config/settings.json
' 
' The wildcard '*' matches zero or more characters.

zip.CloseZip 

Debug.Print "Done."