(C#) Replace/Update a FIle in a .zip

Demonstrates how to replace/update a file from a .zip. Note: This requires the entire .zip to be rewritten.

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

// First prepare a .zip and write it..
Chilkat.Zip zip = new Chilkat.Zip();

bool success;
zip.NewZip("qa_output/abc.zip");

// Add some files..
Chilkat.ZipEntry entry = zip.AppendString("a.txt","aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa");

entry = zip.AppendString("b.txt","bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb");

entry = zip.AppendString("c.txt","cccccccccccccccccccccccccccccccccccc");

// Write to qa_output/abc.zip
// This .zip contains three files: a.txt, b.txt, and c.txt
success = zip.WriteZipAndClose();

// -------------------------------------------------------------------
// Open abc.zip, replace the content of the "b.txt" entry with something else, and re-write.
Chilkat.Zip zip2 = new Chilkat.Zip();
zip2.OpenZip("qa_output/abc.zip");

entry = zip2.GetEntryByName("b.txt");
entry.ReplaceString("This is the new content.  bbbbbbbbbbbbbbbbbbbbbb","utf-8");

// Write the modified .zip back to "abc.zip"
success = zip2.WriteZipAndClose();

Debug.WriteLine("success.");