(Classic ASP) Iterate Through ZIP Entries Using EntryAt and ZipEntry.GetNext

See more Zip Examples

This example demonstrates how to iterate through all entries in a ZIP archive using:

Zip.EntryAt to obtain the first entry
ZipEntry.GetNext to advance through the remaining entries

The example prints each ZIP entry's stored filename and whether the entry is a file or directory.

This approach is useful when sequentially processing ZIP entries without repeatedly calling EntryAt by index.

Suppose the ZIP archive contains:

docs/ docs/readme.txt images/logo.png hello.txt

The example iterates through each entry in the order stored within the ZIP archive.

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ActiveX for 32-bit and 64-bit Windows

<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
</head>
<body>
<%
success = 0

set zip = Server.CreateObject("Chilkat.Zip")

' Open an existing ZIP archive.
success = zip.OpenZip("c:/temp/example.zip")
If (success = 0) Then
    Response.Write "<pre>" & Server.HTMLEncode( zip.LastErrorText) & "</pre>"
    Response.End
End If

' A ZIP archive may contain zero entries.
If (zip.NumEntries = 0) Then

    Response.Write "<pre>" & Server.HTMLEncode( "The ZIP archive is empty.") & "</pre>"

    zip.CloseZip 
    Response.End
End If

' ------------------------------------------------------------
' Get the first ZIP entry.
' 
' EntryAt(0,entry) initializes the ZipEntry object so that
' it represents the first entry in the ZIP archive.
' 
set entry = Server.CreateObject("Chilkat.ZipEntry")

success = zip.EntryAt(0,entry)
If (success = 0) Then
    Response.Write "<pre>" & Server.HTMLEncode( zip.LastErrorText) & "</pre>"
    Response.End
End If

' ------------------------------------------------------------
' Iterate through all ZIP entries.
' 
' GetNext updates the same ZipEntry object so that it
' represents the next entry in the ZIP archive.
' 
Do While (success = 1)

    If (entry.IsDirectory = 1) Then

        Response.Write "<pre>" & Server.HTMLEncode( "[Directory] " & entry.FileName) & "</pre>"

    Else

        Response.Write "<pre>" & Server.HTMLEncode( "[File] " & entry.FileName) & "</pre>"
    End If

    ' Advance to the next entry.
    success = entry.GetNext()
Loop

zip.CloseZip 

Response.Write "<pre>" & Server.HTMLEncode( "Done.") & "</pre>"

%>
</body>
</html>