Modify Content-Disposition Header Fields in MIME

Demonstrates how to edit the Content-Disposition header in MIME sub-parts.

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//  The intent of this example is to modify Content-Disposition
//  header fields from this:
// 
//  Content-Disposition: attachment; filename="a4 manuscript.pdf"; size=0;
//  	creation-date="Thu, 12 Apr 2007 06:39:10 GMT";
//  	modification-date="Thu, 12 Apr 2007 06:39:10 GMT"
// 
//  to this:
// 
//  content-disposition: attachment;
//  	 filename="a4 manuscript.pdf"
// 

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

bool success;
success = mime.UnlockComponent("Anything for 30-day trial");
if (success == false) {
    MessageBox.Show("Failed to unlock");
    return;
}

success = mime.LoadMimeFile("testMime.txt");
if (success == false) {
    MessageBox.Show(mime.LastErrorText);
    return;
}

//  This example assumes the header fields to be modified
//  are located directly beneath the top-level MIME part.
int numParts;
numParts = mime.NumParts;

int i;
Chilkat.Mime mimePart = null;

string filename;
string disposition;

for (i = 0; i <= numParts - 1; i++) {
    mimePart = mime.GetPart(i);

    disposition = mimePart.Disposition;
    if (disposition == "attachment") {
        filename = mimePart.Filename;
        //  AddHeaderField replaces the existing field if it already exists.
        //  Discard the contents of the existing Content-Disposition
        //  and replace it with "attachment".
        mimePart.AddHeaderField("content-disposition","attachment");

        //  Now add the filename attribute:
        mimePart.Filename = filename;
    }

}

success = mime.SaveMime("modifiedMime.txt");