B4X

Change the Filename of an Attachment

Demonstrates the Chilkat Email.SetAttachmentFilename method, which changes the filename of the attachment at a given zero-based index. This example adds an attachment and renames it, printing the filename before and after.

Background: The attachment filename is what a recipient sees and what most clients suggest when saving the file. Renaming it is handy when the original name is unclear, unsafe, or generic — for example giving a machine-generated tmp12345 a meaningful name like invoice.pdf before sending.

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Dim success As Boolean = False

'  Demonstrates the SetAttachmentFilename method, which changes the filename of the
'  attachment at the given zero-based index.

Dim email As ChilkatEmail
email.Initialize
email.Subject = "Set attachment filename"

email.AddStringAttachment("oldname.txt", "Some notes.")
Log("Filename before: " & email.GetAttachmentFilename(0))

'  Change the filename of the first attachment (index 0).
success = email.SetAttachmentFilename(0, "newname.txt")
If success = False Then
    Log(email.LastErrorText)
    Return
End If


Log("Filename after: " & email.GetAttachmentFilename(0))