email attachments not attaching

I am authoring a simple online application form which allows a user to upload cover letter and/or resume. The files are then stored in a database and also emailed to the correct person as attachments. The files are being stored in the database with no problems but they are not being attached to the email properly. Below is the snippet of the code used to attach the files and send the mail:

// Create the mail message
System.Net.Mail.MailMessage mail = new System.Net.Mail.MailMessage("",
    OfficeEmailHiddenField.Value, "Application", message);
mail.IsBodyHtml = true;
// Prepare attachements
if (coverLetterFileUpload.HasFile)
    // Get the cover letter file
    HttpPostedFile coverLetter = coverLetterFileUpload.PostedFile;

    // Creat the attachment from the cover letter document
    System.Net.Mail.Attachment coverLetterAttachment = new System.Net.Mail.Attachment(coverLetter.InputStream,
        Path.GetFileName(coverLetter.FileName), coverLetter.ContentType);

    // Attach the file

if (resumeFileUpload.HasFile)
    // Get the resume file
    HttpPostedFile resume = resumeFileUpload.PostedFile;

    // Create the attachment from the resume document
    System.Net.Mail.Attachment resumeAttachment = new System.Net.Mail.Attachment(resume.InputStream,
        Path.GetFileName(resume.FileName), resume.ContentType);

    // Attach the file

// Send the message
System.Net.Mail.SmtpClient mailer = new System.Net.Mail.SmtpClient();
2/28/2007 9:02:20 PM 93655 articles. 5 followers. Follow

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You need to upload the attachment to the server to be able to send it. Anyways, that's the only way I ever was able to send an attachment. So you need a folder that accepts upload. And basically you just upload it, send the mail with the attachment, then just delete the file. (unless you want to keep it on the server. in which case, just make the database point to the uploaded file on the server?)


The best way to succeed is to take small steps. You can't take small steps if you're running, so take your time, take a few steps back, and everything will work out fine.
2/28/2007 9:27:16 PM

Thank you for your suggestion. I will have to do that if there is no other way, but I thought that one of the advantages of ASP.NET 2.0 was the ability to create an email attachment directly from a stream--which is what I'm trying to do--eliminating the need to impliment the archaic .NET 1.1 way of saving, attaching and deleting?

I should have fully explained that a file(s) with the proper name and content type IS being attached to the email message, but the file(s) have no data. In my testing of the application, I am trying to upload and attach a 24kb word document. When debugging and stepping through the method line-by-line, after this line executes:

// Creat the attachment from the cover letter document
System.Net.Mail.Attachment coverLetterAttachment = new System.Net.Mail.Attachment(coverLetter.InputStream,
    Path.GetFileName(coverLetter.FileName), coverLetter.ContentType);

coverLetterAttachment.ContentStream does in fact equal/reference the full coverLetter.InputString with a total length of 24064 i.e. 24kb.

I also used the debugger to watch the value of mail.Attachments[0].ContentStream.Length and after the method has executed these lines:

// Send the message
System.Net.Mail.SmtpClient mailer = new System.Net.Mail.SmtpClient();

mail.Attachments[0].ContentStream.Length still equals 24064.

I can't find at what point in the application the value is changing from 24064 to 185?

2/28/2007 10:02:36 PM

I created a very simple page (source code below) to confirm that attachments can be created from a System.Web.UI.WebControls.FileUpload.PostedFile.InputStream and indeed the following page executes flawlessly and the attachment is complete. Thus, the error is somwhere in my page logic and independent from any limitations of ASP.NET.

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="AttachmentTest.aspx.cs" Inherits="AttachmentTest" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "">

<html xmlns="" >
<head runat="server">
    <title>Untitled Page</title>
    <form id="form1" runat="server">
            <asp:FileUpload ID="SampleFileUpload" runat="server" />
        <asp:Button ID="Button1" runat="server" Text="Button" OnClick="Button1_Click" />
using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.IO;
using System.Net.Mail;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;

public partial class AttachmentTest : System.Web.UI.Page
    protected void Page_Load(object sender, EventArgs e)

    protected void Button1_Click(object sender, EventArgs e)
        // Create email attachment from the FileUpload.PostedFile.InputStream
        Attachment sample = new Attachment(SampleFileUpload.PostedFile.InputStream, Path.GetFileName(SampleFileUpload.PostedFile.FileName),
        // Create the mail message with the attachment
        MailMessage mail = new MailMessage("", "", "Sample", "File Attached.");

        // Send the email
        SmtpClient mailer = new SmtpClient();
2/28/2007 11:27:38 PM

I am having a similar problem to this with an Excel spreadsheet that I am attempting to attach via a memorystream object.  Did you ever find a solution to this problem?

1/11/2008 2:32:59 PM

Perhaps you should try converting the MemoryStream object to a Stream object.

1    MemoryStream oMemoryStream = new MemoryStream();
2    byte[] oTemp = oMemoryStream.ToArray();
3    Stream oStream = new MemoryStream(oTemp);
Give that a roll and see how it treats you.
greg johnson
1/11/2008 4:06:40 PM

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