MailKit - How to get size of each attachment

Question

I want to format attachment info as a string with File Name and File Size

I can get FileName in Attachments.ContentDisposition, but Size is null. Is any other way to get?

Eg : string.Join(',' + Environment.NewLine, mailData[i].Attachments.ToList().Select(y => y.ContentDisposition.FileName + '(' + y.ContentDisposition.Size.ToString() + ')').ToList())

Example output i want :

xxx.jpg(123 bytes), xxx.png(456 bytes), xxx.pdf(123456 bytes),

score 4 · Accepted Answer · answered Jul 23 '19 at 14:20

4

There's no property that will get you the size (the Size property on ContentDisposition relies on the sending client to set that and even when set might not be accurate).

So to get the size of the attachment, you would need to do this:

static long MeasureAttachmentSize (MimePart part)
{
    using (var measure = new MimeKit.IO.MeasuringStream ()) {
        part.Content.DecodeTo (measure);
        return measure.Length;
    }
}

answered Jul 23 '19 at 14:20

jstedfast

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Hi. Will this download the attachment? – hakan Apr 07 '21 at 07:25
The above code snippet assumes you've already downloaded the attachment. – jstedfast Apr 08 '21 at 16:32

MailKit - How to get size of each attachment

1 Answers1