3

我正在使用 asp.net 和 c#.net 发送带有大附件（最大 10mb）的邮件，这是我可以转换文件的原因，.txt、.doc、.xls 文件可以完美发送，但图像和 rar 文件损坏了什么是问题请给我任何建议， 我的代码是

 DataSet ds = SqlHelper.ExecuteDataset(con, "usp_GetEmailSettings", Session["UserID"].ToString());
                message.To.Add(ds.Tables[0].Rows[0]["Email"].ToString());
                message.CC.Add(ds.Tables[1].Rows[0]["EmailID"].ToString());
                message.Subject = ds.Tables[0].Rows[0]["Email_Subject"].ToString();
                message.From = new System.Net.Mail.MailAddress(ds.Tables[1].Rows[0]["EmailID"].ToString());
                message.Body = ds.Tables[0].Rows[0]["Email_Body"].ToString() +
                                       "<br/><br/> <font size='2.0em'>Submission Number : " +filename+"<br/> DBA Name : " +txtDBAName.Text + "<br/> Insured Name : " +TxtInsured.Text + "<br/> Additional Comments : " + txtcomment.Value ;
                message.IsBodyHtml = true;
                string attachId;
                System.Net.Mail.Attachment at;
 // Get the HttpFileCollection and Attach the Multiple files
                HttpFileCollection hfc = Request.Files;
                if (hfc.Count > 0)
                {
                    for (int i = 0; i < hfc.Count; i++)
                    {
                        HttpPostedFile hpf = hfc[i];
                        if (hpf.ContentLength > 0)
                        {
                            if (i == 0)
                            {
                                string[] ext = System.IO.Path.GetFileName(hpf.FileName).Split('.');
                                attachId = filename + "." + ext[1];
                                at = new System.Net.Mail.Attachment(fluuploader.FileContent, attachId);
                            }

                            else
                            {
                                string[] ext = System.IO.Path.GetFileName(hpf.FileName).Split('.');
                                attachId = filename + "(" + i + ")" + "." + ext[1];
                                at = new System.Net.Mail.Attachment(fluuploader.FileContent, attachId);
                            }
                            at.TransferEncoding = System.Net.Mime.TransferEncoding.SevenBit;
                           // at.TransferEncoding = System.Net.Mime.TransferEncoding.QuotedPrintable;                       
                            message.Attachments.Add(at);
                        }

                    }
                }
 smtp.Timeout = 9999999;
                smtp.Send(message);

web.config 我的代码是

<httpRuntime executionTimeout="240" maxRequestLength="20480"/>

at.TransferEncoding = System.Net.Mime.TransferEncoding.SevenBit; 我可以在该行中发表评论，不发送大文件，但一切正常，但我发送的大文件最大为 10mb，请给我建议

4

2 回答 2

7

除非幕后发生了一些黑魔法，否则我认为你需要换掉fluuploader.FileContent. hpf.InputStream此外，我发现将 In​​putStream 的 Position 设置为 0 会有所帮助。您在 for 循环中的最终代码应如下所示：

    HttpPostedFile hpf = hfc[i];

    if (hpf.ContentLength > 0)
    {
        hpf.InputStream.Position = 0;

        if (i == 0)
        {
            string[] ext = System.IO.Path.GetFileName(hpf.FileName).Split('.');
            attachId = filename + "." + ext[1];
            at = new System.Net.Mail.Attachment(hpf.InputStream, attachId);
        }

        else
        {
            string[] ext = System.IO.Path.GetFileName(hpf.FileName).Split('.');
            attachId = filename + "(" + i + ")" + "." + ext[1];
            at = new System.Net.Mail.Attachment(hpf.InputStream, attachId);
        }

        message.Attachments.Add(at);
    }
于 2012-05-24T21:33:22.367 回答
3

试试这个代码。这应该可以我附上近 25MB 的 zip 文件

public static void CreateMessageWithAttachment(string server)
    {
        // Specify the file to be attached and sent.
        // This example assumes that a file named Data.xls exists in the
        // current working directory.
        string file = "data.xls";
        // Create a message and set up the recipients.
        MailMessage message = new MailMessage(
           "jane@contoso.com",
           "ben@contoso.com",
           "Quarterly data report.",
           "See the attached spreadsheet.");

        // Create  the file attachment for this e-mail message.
        Attachment data = new Attachment(file, MediaTypeNames.Application.Octet);
        // Add time stamp information for the file.
        ContentDisposition disposition = data.ContentDisposition;
        disposition.CreationDate = System.IO.File.GetCreationTime(file);
        disposition.ModificationDate = System.IO.File.GetLastWriteTime(file);
        disposition.ReadDate = System.IO.File.GetLastAccessTime(file);
        // Add the file attachment to this e-mail message.
        message.Attachments.Add(data);

        //Send the message.
        SmtpClient client = new SmtpClient(server);
        // Add credentials if the SMTP server requires them.
        client.Credentials = CredentialCache.DefaultNetworkCredentials;

  try {
          client.Send(message);
        }
        catch (Exception ex) {
          Console.WriteLine("Exception caught in CreateMessageWithAttachment(): {0}", 
                ex.ToString() );              
        }
        // Display the values in the ContentDisposition for the attachment.
        ContentDisposition cd = data.ContentDisposition;
        Console.WriteLine("Content disposition");
        Console.WriteLine(cd.ToString());
        Console.WriteLine("File {0}", cd.FileName);
        Console.WriteLine("Size {0}", cd.Size);
        Console.WriteLine("Creation {0}", cd.CreationDate);
        Console.WriteLine("Modification {0}", cd.ModificationDate);
        Console.WriteLine("Read {0}", cd.ReadDate);
        Console.WriteLine("Inline {0}", cd.Inline);
        Console.WriteLine("Parameters: {0}", cd.Parameters.Count);
        foreach (DictionaryEntry d in cd.Parameters)
        {
            Console.WriteLine("{0} = {1}", d.Key, d.Value);
        }
        data.Dispose();
    }

如果您收到错误请回帖

于 2012-05-29T09:25:39.290 回答