Get a Digest Message as an Email Object

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Demonstrates the Chilkat Email.GetDigestEmail method, which copies the Nth digest email contained within a multipart/digest into another Email object. The first digest is at index 0; the NumDigests property gives the count. This example loads a digest email and lists each bundled message's subject.

Background: A multipart/digest packs many separate emails into one carrier message — historically used by mailing lists to send a single daily bundle of that day's posts. GetDigestEmail unpacks each member into a full Email object so it can be read or processed individually. This differs from GetAttachedEmail, which extracts messages attached to an ordinary email rather than the members of a digest.

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bool success = false;

//  Demonstrates the GetDigestEmail method, which copies the Nth digest email contained
//  within a multipart/digest into another Email object.  The first digest is at index 0;
//  use the NumDigests property for the count.

Chilkat.Email email = new Chilkat.Email();

success = email.LoadEml("qa_data/eml/digest.eml");
if (success == false) {
    Debug.WriteLine(email.LastErrorText);
    return;
}

int n = email.NumDigests;
Debug.WriteLine("NumDigests = " + Convert.ToString(n));

//  Retrieve each bundled message as its own Email object.
Chilkat.Email digestEmail = new Chilkat.Email();
int i;
for (i = 0; i <= n - 1; i++) {
    success = email.GetDigestEmail(i,digestEmail);
    Debug.WriteLine("Digest " + Convert.ToString(i) + " subject: " + digestEmail.Subject);
}

//  Note: The path "qa_data/..." is a relative local filesystem path,
//  relative to the current working directory of the running application.