有没有一种简单的方法可以将Microsoft.Office.Interop.Outlook.MailItem转换为System.Net.Mail.MailMessage？

Question

The title pretty much says it all. I have an Outlook interop MailItem . I'd like to create a System.Net.Mail MailMessage from the MailItem , modify a few properties (such as the sender), and then send it. Is this something that must be done manually, or do either of these libraries (or a third party library) provide a simple way to achieve this?

Answer 1

MailItem from Outlook and MailMessage from the .NET Framework are very different things.

You need to do a lot of work manually:

1. Copy simple properties like subject, sender, to/cc/bcc lists.
2. Fetch all body formats and create new bodies in MailMessage .
3. Fetch and store attachments from MailItem using temporary files or memory streams.
4. Create new attachments for MailMessage using stored data from the previous point.