Check if a MIME Part is Plain Text

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Demonstrates the Chilkat Mime.IsPlainText method, which returns whether the Content-Type is exactly text/plain. It takes no arguments and applies to the current part.

Note: The file path is relative to the application's current working directory. Absolute paths may also be used. Supply the path to your own file.

Background: Inside a multipart/alternative, this is how you pick out the plain-text rendering — the fallback to show when HTML cannot be displayed, or the version to index for search. It is the specific counterpart to IsHtml.

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bool success = false;

//  Demonstrates the Mime.IsPlainText method, which returns whether the Content-Type is text/plain.  It takes no arguments and applies to the current
//  part.  This example iterates the parts of a multipart message and reports which ones match.

Chilkat.Mime mime = new Chilkat.Mime();
success = mime.LoadMimeFile("qa_data/multipart_message.eml");
if (success == false) {
    Debug.WriteLine(mime.LastErrorText);
    return;
}

int n = mime.NumParts;
Chilkat.Mime part = new Chilkat.Mime();
int i;
for (i = 0; i <= n - 1; i++) {
    success = mime.PartAt(i,part);
    if (success == false) {
        Debug.WriteLine(mime.LastErrorText);
        return;
    }

    if (part.IsPlainText()) {
        Debug.WriteLine("Part " + Convert.ToString(i) + " (" + part.ContentType + ") is plain text.");
    }

}