Get a Header Field by Name

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Demonstrates the Chilkat Email.GetHeaderField method, which returns the value of a header field by name. Header-field names are case-insensitive, so X-Priority and x-priority refer to the same field. This example reads several headers by name.

Background: Looking up a header by name is the quickest way to read a known field like Subject or a custom X- header. One caveat: some header names (such as Received) can legitimately appear more than once. When a field may repeat and you need every occurrence, enumerate by index with GetHeaderFieldName and GetHeaderFieldValue instead of looking up by name.

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//  Demonstrates the GetHeaderField method, which returns the value of a header field by
//  name.  Header-field names are case-insensitive.

Chilkat.Email email = new Chilkat.Email();
email.Subject = "Quarterly report";
email.From = "alice@example.com";
email.AddHeaderField("X-Priority","1");

//  Get header field values by name.
Debug.WriteLine("Subject = " + email.GetHeaderField("Subject"));
Debug.WriteLine("From = " + email.GetHeaderField("From"));
Debug.WriteLine("X-Priority = " + email.GetHeaderField("x-priority"));