c#中的多个附件

Question

我在程序中发送多个附件时遇到问题.

在我尝试添加多个附件之前,我没有遇到任何问题.所以我改变了代码,它停止了工作.

创建附件: 未添加所有代码以使其更易于查看.

Attachment attachment = getAttachment(bodyFile, "Formulier" + counter + ".doc");
attachments.Add(attachment);
//attachment.Dispose();

if (attachments != null)
{
  foreach (Attachment attachment in attachments)
  {
    email.Attachments.Add(attachment);
  }
}    

得到附件

private Attachment getAttachment(string bodyFile, string title)
{
  return createDocument(bodyFile, title);
}

创建文件

private Attachment createDocument(string bodyFile, string title) 
{
  string activeDir = HttpContext.Current.Server.MapPath("/Tools");
  string newPath = Path.Combine(activeDir, "Documents");

  Directory.CreateDirectory(newPath);
  newPath = Path.Combine(newPath, title);

  FileStream fs = File.Create(newPath);
  fs.Close();
  File.WriteAllText(newPath, bodyFile);

  var fstemp = new FileStream(newPath, FileMode.Open, FileAccess.Read);
  return new Attachment(fstemp, title, MediaTypeNames.Application.Octet);

}

我在记录器中得到的错误

2012-07-04 15:45:26,149 [19] ERROR Mvc - System.Net.Mail.SmtpException: Failure sending mail. ---> System.ObjectDisposedException: Cannot access a closed file.
   at System.IO.__Error.FileNotOpen()
   at System.IO.FileStream.Read(Byte[] array, Int32 offset, Int32 count)
   at System.Net.Mime.MimePart.Send(BaseWriter writer)
   at System.Net.Mime.MimeMultiPart.Send(BaseWriter writer)
   at System.Net.Mail.Message.Send(BaseWriter writer, Boolean sendEnvelope)
   at System.Net.Mail.SmtpClient.Send(MailMessage message)
   --- End of inner exception stack trace ---
   at System.Net.Mail.SmtpClient.Send(MailMessage message)
   at ARTex.Tools.Mailer.Send(SmtpClient smtpClient, List`1 receivers, String subject, String body, List`1 attachments, String cc) in C:\Projects\KTN.Web.ARTex\ARTex\ARTex\Tools\Mailer.cs:line 262

编辑

我摆脱了.Dispose方法并更改了var fstemp = new FileStream(newPath ... 现在我可以发送多个附件.但现在他们随机给出错误.5次中有4次有效.第四次再次出现错误,无法打开文件.第五次它再次神奇地起作用.

编辑:解决方案

我使用了一个使用块和两个答案.这很有效.Tnx到@HatSoft和@Aghilas Yakoub

Answer 1

尝试使用以下几行（在您的CreateDocument方法中）：

var fstemp = new FileStream(newPath, FileMode.Open, FileAccess.Read);
return new Attachment(fstemp, title, MediaTypeNames.Application.Octet);