Question

当我的应用程序崩溃并附带描述问题的附件时，我正在尝试发送电子邮件（错误详细信息是从数据库中收集的）。我已经尝试创建文件而不将其附加到电子邮件，它工作正常（使用从数据库收集的数据）。这是一个非常接近我的例子：

MailMessage mailMessage = new MailMessage();
mailMessage.To.Add("Address1@test.com");
mailMessage.From = new MailAddress("Address2@test.com");
mailMessage.Subject = "Subject";
mailMessage.Body = "Body";

FileStream fs = new FileStream("Test.txt", FileMode.Create, FileAccess.ReadWrite);
StreamWriter sw = new StreamWriter(fs);
sw.WriteLine("Text");

Attachment attach = new Attachment(fs, "Test.txt", "Text/Plain");
mailMessage.Attachments.Add(attach);

SmtpClient smtp = new SmtpClient();

try
{
    smtp.Send(mailMessage);
}
catch(Exception ex)
{
     MessageBox.Show(ex.Message + Environment.NewLine + ex.InnerException);
}

sw.Close();

我也尝试过：

MailMessage mailMessage = new MailMessage();
mailMessage.To.Add("Address1@test.com");
mailMessage.From = new MailAddress("Address2@test.com");
mailMessage.Subject = "Subject";
mailMessage.Body = "Body";

using (FileStream fs = new FileStream("Test.txt", FileMode.Create, FileAccess.ReadWrite))
{
     StreamWriter sw = new StreamWriter(fs);
     sw.WriteLine("Text");


     Attachment attach = new Attachment(fs, "Test.txt", "Text/Plain");
     mailMessage.Attachments.Add(attach);

     SmtpClient smtp = new SmtpClient();

     try
     {
         smtp.Send(mailMessage);
     }
     catch (Exception ex)
     {
          MessageBox.Show(ex.Message + Environment.NewLine + ex.InnerException);
     }
}

该文件附在电子邮件上，有一个大小，但是为空。我做错了什么？

提前致谢。

Answer 1

回答我自己的问题......找到答案here。

以下是我使用的代码：

MailMessage mailMessage = new MailMessage();
mailMessage.To.Add("Address1@test.com");
mailMessage.From = new MailAddress("Address2@test.com");
mailMessage.Subject = "Subject";
mailMessage.Body = "Body";

using (MemoryStream memoryStream = new MemoryStream())
{
     byte[] contentAsBytes = Encoding.UTF8.GetBytes("Test");
     memoryStream.Write(contentAsBytes, 0, contentAsBytes.Length);

     memoryStream.Seek(0, SeekOrigin.Begin);
     ContentType contentType = new ContentType();
     contentType.MediaType = MediaTypeNames.Text.Plain;
     contentType.Name = "Test.txt";

      Attachment attach = new Attachment(memoryStream, contentType);
      mailMessage.Attachments.Add(attach);

      SmtpClient smtp = new SmtpClient();

      try
      {
          smtp.Send(mailMessage);
      }
      catch (Exception ex)
      {
          MessageBox.Show(ex.Message + Environment.NewLine + ex.InnerException);
      }
}

我使用 MemoryStream 而不是 FileStream 。我还创建了一个内容类型对象，而不是仅仅将MediaType指定到Attachment Constructor中。

感谢大家的帮助。

Answer 2

using (FileStream fs = new FileStream("Test.txt", FileMode.Create, FileAccess.ReadWrite))
{
    StreamWriter sw = new StreamWriter(fs);
    sw.WriteLine("Text");
    sw.Close();
}

MailMessage mailMessage = new MailMessage();
mailMessage.To.Add("Address1@test.com");
mailMessage.From = new MailAddress("Address2@test.com");
mailMessage.Subject = "Subject";
mailMessage.Body = "Body";


 Attachment attach = new Attachment("Test.txt", "Text/Plain"); //add a complete file path if needed
 mailMessage.Attachments.Add(attach);

 SmtpClient smtp = new SmtpClient();

 try
 {
     smtp.Send(mailMessage);
 }
 catch (Exception ex)
 {
      MessageBox.Show(ex.Message + Environment.NewLine + ex.InnerException);
 }

}

附加到MailMessage对象时的C＃空文件

2 个答案: