MIME Multipart Boundary and Preamble Properties

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Demonstrates the Boundary property, which gets or sets the raw boundary token of a multipart entity (without surrounding quotation marks), and UseMmDescription, which controls whether the conventional preamble text is emitted when serializing a multipart entity.

bool success = false;

Chilkat.Mime mime = new Chilkat.Mime();

//  Create a multipart/mixed entity.
success = mime.NewMultipartMixed();
if (success == false) {
    Debug.WriteLine(mime.LastErrorText);
    return;
}

//  Boundary is the raw boundary token, without surrounding quotation marks.  Chilkat quotes it
//  automatically in the serialized header when required.
mime.Boundary = "example-boundary";

//  UseMmDescription controls whether the conventional preamble text
//  "This is a multi-part message in MIME format." is emitted.  The default is false.
mime.UseMmDescription = true;

//  Add a simple part so the multipart has content.
Chilkat.Mime part = new Chilkat.Mime();
success = part.SetBodyFromPlainText("First part.");
if (success == false) {
    Debug.WriteLine(part.LastErrorText);
    return;
}

success = mime.AppendPart(part);
if (success == false) {
    Debug.WriteLine(mime.LastErrorText);
    return;
}

Debug.WriteLine("Boundary = " + mime.Boundary);

string mimeStr = mime.GetMime();
if (mime.LastMethodSuccess == false) {
    Debug.WriteLine(mime.LastErrorText);
    return;
}

Debug.WriteLine(mimeStr);