PowerBuilder

Find a ZIP Entry by EntryID Using EntryById

See more Zip Examples

This example demonstrates how to use the EntryById method to retrieve a ZIP entry using its unique EntryID.

Each ZipEntry object has an EntryID property that uniquely identifies the entry within the currently open ZIP object.

This is useful when:

• An application stores EntryID values for later use
• ZIP entries need to be retrieved without searching by filename
• Multiple entries may have similar names or paths

The example:

• Opens a ZIP archive
• Retrieves an entry using EntryAt
• Saves the entry's EntryID
• Uses EntryById to retrieve the same entry later

PowerBuilder

integer li_rc
integer li_Success
oleobject loo_Zip
oleobject loo_Entry
integer li_EntryId
oleobject loo_Entry2

li_Success = 0

li_Success = 0

// Open an existing ZIP archive.
loo_Zip = create oleobject
li_rc = loo_Zip.ConnectToNewObject("Chilkat.Zip")
if li_rc < 0 then
    destroy loo_Zip
    MessageBox("Error","Connecting to COM object failed")
    return
end if

li_Success = loo_Zip.OpenZip("example.zip")
if li_Success = 0 then
    Write-Debug loo_Zip.LastErrorText
    destroy loo_Zip
    return
end if

// Retrieve the first entry in the ZIP archive.
loo_Entry = create oleobject
li_rc = loo_Entry.ConnectToNewObject("Chilkat.ZipEntry")

li_Success = loo_Zip.EntryAt(0,loo_Entry)
if li_Success = 0 then
    Write-Debug loo_Zip.LastErrorText
    destroy loo_Zip
    destroy loo_Entry
    return
end if

Write-Debug "Original entry:"
Write-Debug "  FileName: " + loo_Entry.FileName
Write-Debug "  EntryID: " + string(loo_Entry.EntryID)
Write-Debug ""

// Save the EntryID for later use.
li_EntryId = loo_Entry.EntryID

// Create another ZipEntry object.
loo_Entry2 = create oleobject
li_rc = loo_Entry2.ConnectToNewObject("Chilkat.ZipEntry")

// Retrieve the same entry using EntryById.
li_Success = loo_Zip.EntryById(li_EntryId,loo_Entry2)
if li_Success = 0 then
    Write-Debug loo_Zip.LastErrorText
    destroy loo_Zip
    destroy loo_Entry
    destroy loo_Entry2
    return
end if

Write-Debug "Entry retrieved by EntryID:"
Write-Debug "  FileName: " + loo_Entry2.FileName
Write-Debug "  EntryID: " + string(loo_Entry2.EntryID)
Write-Debug ""

// The filenames and EntryID values should match.
loo_Zip.CloseZip()

Write-Debug "Done."


destroy loo_Zip
destroy loo_Entry
destroy loo_Entry2