無法創建並通過郵件

我試圖創建和發送動態csv文件作爲附件在郵件發送動態CSV文件作爲附件，但它不工作。我可以通過發送郵件發送郵件，但文件已經空了。以下是我的代碼：無法創建並通過郵件

var notProcessedRecords = FileFTPData.Where(x => x.LastName.StartsWith("9999")).ToList(); 

     string loggedInUserName = "Administrator"; 

     try 
     { 
     MemoryStream stream = new MemoryStream(); 
     TextWriter writer = new StreamWriter(stream, Encoding.Default); 
     StringBuilder sb = new StringBuilder(); 
     sb.AppendFormat(string.Format("{0}, {1}, {2}, {3}, {4}, {5} ", "FIRSTNAME", "LASTNAME", "USERID", "COMPANYNAME", "EMAIL", "PHONE")); 

     foreach (var item in notProcessedRecords) 
     { 
      sb.AppendLine(); 
      sb.AppendFormat(string.Format("{0}, {1}, {2}, {3}, {4}, {5} ", item.FirstName, item.LastName, item.UserId, item.CompanyName, item.Email, item.Phone)); 
     } 
     writer.WriteLine(sb); 

     MailMessage mail = new MailMessage(); 
     SmtpClient SmtpServer = new SmtpClient("smtp.gmail.com"); 
     mail.From = new MailAddress("******@gmail.com"); 
     mail.To.Add("*******@yahoo.com"); 
     mail.Subject = "FTP file processing status"; 
     mail.Body = "<div>Hello " + loggedInUserName + ", </br></br> Following item are restricted from processing, due to some errors. Please check Process description for the same. </br></br> From, </br>Streben Support </div>"; 
     mail.IsBodyHtml = true; 

     Attachment attachment = new Attachment(stream, new ContentType("text/csv")); 
     attachment.Name = "test.csv"; 
     mail.Attachments.Add(attachment); 

     SmtpServer.Port = 587; 
     SmtpServer.Credentials = new System.Net.NetworkCredential("******@gmail.com", "******"); 
     SmtpServer.EnableSsl = true; 

     SmtpServer.Send(mail); 

     } 
     catch(Exception ex) 
     { 
     }

有人可以幫我糾正這個問題嗎？

來源

2017-02-16 Sachin

正如你剛剛寫完的Position屬性將被設定爲數據流的末端流。此外，在作者中可能還有一些數據緩衝區尚未刷新到流中。因此，從流中創建附件時，它將顯示爲空。要解決這個問題，請執行以下操作：

// Done writing here // 

writer.Flush(); 
stream.Position = 0; 

// Create attachment here //

來源

2017-02-16 06:32:05

I set stream.position = 0，仍然文件在附件中爲空。 – Sachin

設置位置之前您已沖洗過嗎？ –

號我沒有這些行之後沖洗：附件附接=新附件（流，新的ContentType（「文本/ CSV」））; attachment.Name = 「test.csv」; mail.Attachments.Add（附着）; writer.Flush（）; – Sachin

無法創建並通過郵件

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