Create Password Protected Zip containing a Single File.

Create a password-protected .zip containing a single file. (This uses the older Zip 2.0 encryption scheme, which is weaker and not as secure as AES encryption, which Chilkat Zip also supports.)

Download Chilkat .NET for 2.0 Framework

Download Chilkat .NET for 1.0 / 1.1 Framework

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

bool success;

//  Any string unlocks the component for the 1st 30-days.
success = zip.UnlockComponent("Anything for 30-day trial");
if (success != true) {
    MessageBox.Show(zip.LastErrorText);
    return;
}

success = zip.NewZip("test.zip");
if (success != true) {
    MessageBox.Show(zip.LastErrorText);
    return;
}

zip.SetPassword("secret");
zip.PasswordProtect = true;

bool saveExtraPath;
saveExtraPath = false;
success = zip.AppendOneFileOrDir("c:/temp/hamlet.xml",saveExtraPath);

success = zip.WriteZipAndClose();
if (success != true) {
    MessageBox.Show(zip.LastErrorText);
    return;
}

MessageBox.Show("Zip Created!");