VB.NET

Add an Attachment from a BinData Object

Demonstrates the Chilkat Email.AddAttachmentBd method, which adds an attachment using the contents of a BinData object. The first argument is the attachment filename, the second is the BinData, and the third is the content type — if empty, it is inferred from the filename extension. This example loads a PDF into a BinData and attaches it.

Background: BinData is Chilkat's container for raw binary data. Attaching from a BinData is the right approach when the file's bytes are already in memory — generated on the fly, downloaded, or read from a database — rather than sitting on disk (which would use AddFileAttachment). Chilkat Base64-encodes the bytes into the message automatically.

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Dim success As Boolean = False

'  Demonstrates the AddAttachmentBd method, which adds an attachment using the contents of a
'  BinData object.  The first argument is the attachment filename, the second is the BinData
'  object, and the third is the content type (inferred from the filename extension if empty).

Dim email As New Chilkat.Email
email.Subject = "Attach from BinData"
email.Body = "Please see the attached file."

'  Load a file into a BinData object, then attach it.
Dim bd As New Chilkat.BinData
success = bd.LoadFile("qa_data/attachments/report.pdf")
If (success = False) Then
    Debug.WriteLine(bd.LastErrorText)
    Exit Sub
End If


success = email.AddAttachmentBd("report.pdf",bd,"application/pdf")
If (success = False) Then
    Debug.WriteLine(email.LastErrorText)
    Exit Sub
End If


Debug.WriteLine("NumAttachments = " & email.NumAttachments)

'  Note: The path "qa_data/attachments/report.pdf" is a relative local filesystem path,
'  relative to the current working directory of the running application.