Classic ASP

Get the Size of an Attachment

Demonstrates the Chilkat Email.GetAttachmentSize method, which returns the size in bytes of the attachment at a given zero-based index, or -1 if the index does not identify an existing attachment. This example adds an attachment and prints its size.

Background: The size reported is that of the attachment's actual (decoded) data, not its larger Base64-encoded form on the wire. Knowing per-attachment sizes is handy for enforcing limits, showing a size next to each attachment in a UI, or deciding whether to save or skip a large part. The -1 sentinel is how the method signals an out-of-range index rather than a zero-length attachment.

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Classic ASP

<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
</head>
<body>
<%
'  Demonstrates the GetAttachmentSize method, which returns the size in bytes of the
'  attachment at the given zero-based index.  It returns -1 if the index does not identify
'  an existing attachment.

set email = Server.CreateObject("Chilkat.Email")
email.Subject = "Attachment size"

success = email.AddStringAttachment("notes.txt","Some notes for the attachment.")

'  Get the size in bytes of the first attachment (index 0).
sz = email.GetAttachmentSize(0)
Response.Write "<pre>" & Server.HTMLEncode( "Attachment 0 size (bytes) = " & sz) & "</pre>"

%>
</body>
</html>