如何在c#中不使用httppostedfilebase发送电子邮件附件?

I used angularjs to submit a form via ajax to call the action in my mvc controller. and using my angular directives I can get the filename, contenttype and contentlength of the selected file. Are this three information that I extracted from angular are enough to attach the file to my email? Thank you all for your help.I used angularjs to submit a form via ajax to c