File is already used by another process...

Hi

Hi friends,


Sorry use this post rather than above one.

I have one problem. Please help me to sort out this.

I am send email with attachments. It is working fine.
I want to do is that, after sending the mail, I want to move the files which i attached to the mail from it's original location to other location in my hard drive.

But When I am doing this, It gives me the exception "File is already in use by another process"

Code:
SendMessageWithAttachment() this method actually send the mail.
public static string SendMessageWithAttachment(string sendTo, string sendFrom, string sendSubject, string sendMessage, ArrayList attachments)
{
try
{
message = new MailMessage(
sendFrom,
sendTo,
sendSubject,
sendMessage);

foreach (string attach in attachments)
{
Attachment attached = new Attachment(attach, MediaTypeNames.Application.Octet);
message.Attachments.Add(attached);
}

client = new SmtpClient(Properties.Settings.Default.SMTPAddress);

NetworkCredential basicAuthentication = new NetworkCredential(Properties.Settings.Default.Username, Properties.Settings.Default.Password);
client.EnableSsl = true;
client.Port = Convert.ToInt32(Properties.Settings.Default.Port);
client.UseDefaultCredentials = false;
client.Credentials = basicAuthentication;
// send message
client.Send(message);

return "Message sent to " + sendTo + " at " + DateTime.Now.ToString() + ".";
}
catch (Exception ex)
{
return ex.Message.ToString();
}
}

Here I am invoking the above method

ArrayList sendAttachments = new ArrayList(Directory.GetFiles("InProcess Mails"));

string status = Emailer.SendMessageWithAttachment(sendTo, sendFrom, sendSubject, sendMsgBody, sendAttachments);

MessageBox.Show(status, "Email Status");
foreach (string str in sendAttachments)
{
File.Move(str, "SentMail\\" + str.Substring(str.LastIndexOf('\\'))); <--- This is the line where exception is through
}


Please solve my this problem.

Thanks & regards,
Manesh

1. Welcome :)
2. Edit your posts, don't double-post
3. Please use code-tags. (["code"] and [/"code"] without the quotes)


Outlook has a habit of keeping a handle on any file it uses until it (Outlook) is closed and reopened. I know that it does this with .msg files which I used in an application not too long ago. My solution was to copy the .msg file to another location before opening it. I don't know if this is the same with the SmtpClient, but I suggest you copy the attachment files before attaching them to an e-mail and see if the error is still occurring. If it is, the problem lies elsewhere