c# - c#中的多个附件

Question

我在程序中发送多个附件时遇到问题。

在尝试添加多个附件之前，我没有遇到任何问题。 所以我更改了一些代码，但它停止工作了。

创建附件: 没有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);
  }
}    

获取附件

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

正在创建文件

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);

}

我在记录器中遇到的错误

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。但是现在他们随机给出错误或不给出错误。 5 次中有 4 次有效。第 4 次，它再次给出无法打开文件的错误。第 5 次它又神奇地起作用了。

编辑:解决方案

我结合使用了一个 using block 和两个答案。这奏效了。 Tnx @HatSoft 和@Aghilas Yakoub

Answer 1

尝试使用这些行(在您的 CreateDocument 方法中):

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