Rust Requires Chilkat v11.0.0+

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

Rust

// Open an existing ZIP archive.
let zip = chilkat::Zip::new();

if zip.open_zip("example.zip").is_err() {
    println!("{}", zip.last_error_text());
    return;
}

// Retrieve the first entry in the ZIP archive.
let entry = chilkat::ZipEntry::new();

if zip.entry_at(0, &entry).is_err() {
    println!("{}", zip.last_error_text());
    return;
}

println!("Original entry:");
println!("  FileName: {}", entry.file_name());
println!("  EntryID: {}", entry.entry_id());
println!("");

// Save the EntryID for later use.
let entry_id = entry.entry_id();

// Create another ZipEntry object.
let entry2 = chilkat::ZipEntry::new();

// Retrieve the same entry using EntryById.
if zip.entry_by_id(entry_id, &entry2).is_err() {
    println!("{}", zip.last_error_text());
    return;
}

println!("Entry retrieved by EntryID:");
println!("  FileName: {}", entry2.file_name());
println!("  EntryID: {}", entry2.entry_id());
println!("");

// The filenames and EntryID values should match.
zip.close_zip();

println!("Done.");