从文件夹附加word文档，c＃邮件信息

Question

我试图从网站中的某个文件夹附加一个word文件。 这是我正在尝试：

Attachment attachment = new Attachment(msg.Attachments.Add(HttpContext.Current.Server.MapPath(@"Docs\" + companyName + ".doc"))); 

我得到这些错误：

The best overloaded method match for 'System.Collections.ObjectModel.Collection<System.Net.Mail.Attachment>.Add(System.Net.Mail.Attachment)' has some invalid arguments 
cannot convert from 'void' to 'string' 
cannot convert from 'string' to 'System.Net.Mail.Attachment' 

任何想法如何，我可以解决这个问题？ 由于提前，Laziale

Answer 1

string path = HttpContext.Current.Server.MapPath(@"Docs\" + companyName + ".doc"); 
Attachment attachment = new Attachment(path); 
msg.Attachments.Add(attachment); 

Answer 2

Attachment a = new Attachment(HttpContext.Current.Server.MapPath(@"Docs\" + companyName + ".doc")); 
msg.Attachments.Add(a);