C#

Append Dir Tree to Existing Zip w/out Rewriting Entire Zip

See more Zip Examples

Demonstrates how to use the QuickAppend method to append a directory tree to an existing .zip archive. This method works by editing the existing .zip -- it does not rewrite or recompress the contents of the existing .zip. It is the fastest way to append additional files to a pre-existing large .zip archive. C#

bool success = false;

//  This example requires the Chilkat API to have been previously unlocked.
//  See Global Unlock Sample for sample code.

Chilkat.Zip zip = new Chilkat.Zip();

//  The NewZip method only initializes the Zip object -- it does
//  not create or write a .zip file.
success = zip.NewZip("notUsed.zip");
if (success == false) {
    Debug.WriteLine(zip.LastErrorText);
    return;
}

//  Add a references to all files in a directory tree.
//  Note: this does not read or compress the file contents --
//  it simply adds file references to the zip object.
bool recurse = true;
success = zip.AppendFiles("c:/temp/abc123/*",recurse);
if (success == false) {
    Debug.WriteLine(zip.LastErrorText);
    return;
}

//  Appends the contents of the zip object to the preExisting.zip
//  zip archive.  preExisting.zip is opened, and the files
//  referenced by this zip object are streamed in, compressed,
//  and appended to the end of the archive.
success = zip.QuickAppend("preExisting.zip");
if (success == false) {
    Debug.WriteLine(zip.LastErrorText);
    return;
}

Debug.WriteLine("Success!");

//  Note: Additional files, directory trees, or in-memory data
//  can be appended by calling AddFile, AppendFiles,
//  AddString, AddBd, AddSb, etc. multiple times.
//  Whatever files and/or in-memory data that are referenced by
//  this zip object will be appended to preExisting.zip when
//  QuickAppend is called.