Problem with difference between System.Web.Mail and System.Net.Mail in using attachments
I have a web .Net app which sends emails with attachments. After the email is sent I clean up aftermyself and delete the attachments from disk. In upgrading to .Net 2 I changed the email logic from using system.web.mail to system.net.mail (of course vs is telling me system.web.mail is obsolete).
In .Net 1.1, the files deleted with no problem but in .Net 2 when I attempt to delete I receiveThe process cannot access the file ...' because it is being used by another process.
If I change the code back to using system.web.mail I can delete the files. So it would appear that something about the mail object, using system.net.mail, keeps the file in use. I found the same is true if I attempt to overwrite the files using something like File.Copy(from,to, true). Why in .Net 2 would the disk files still be in use...or at least how can they be released?
Below is snip of code, both the 1.1 and 2.0 version..Net 1.1 code
============================
Dim mailObj As New System.Web.Mail.MailMessage()
With mailObj
.From = fromName
.To = toName
.Body = body.ToString
.Priority = MailPriority.High
.Subject = "Test"
.BodyFormat = Mail.MailFormat.Html
.Attachments.Add(New System.Web.Mail.MailAttachment(attachment1Name))
.Attachments.Add(New System.Web.Mail.MailAttachment(attachment2Name))End With
System.Web.Mail.SmtpMail.SmtpServer = server
System.Web.Mail.SmtpMail.Send(mailObj)
File.Delete(attachment1Name)
File.Delete(attachment2Name)
========================================.Net 2.0 code
========================================
Dim mailObj As New MailMessage(fromName, toName)
With mailObj
.Body = body.ToString
.Priority = MailPriority.High
.Subject = "Test"
.IsBodyHtml = True
.Attachments.Add(New Attachment(attachment1Name))
.Attachments.Add(New Attachment(attachment2Name))End With
Dim mailserver As New SmtpClient(server)
mailserver.Send(mailObj)
File.Delete(attachment1Name)
File.Delete(attachment2Name)
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BradW
4/25/2006 6:18:42 PM
asp.net.migrating-from-1.x-2.0
1016 articles. 
0 followers.
2 Replies
2003 Views
mailserver.Send(mailObj)
mailObj.dispose()
File.Delete(attachment1Name)
File.Delete(attachment2Name)
should work.
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aswin
1/4/2007 1:29:26 PM
Well .. it's over a year , but anyway :
Read this ..
http://forums.microsoft.com/MSDN/ShowPost.aspx?PostID=164793&SiteID=1
I've got to that one trying to figure out why I have some delay with my Send method .
And it turns out that it also holds the attached files..
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alexyag
11/13/2007 5:28:10 PM
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