How to send mail with multiple attachments in asp.net

By: Suresh Dasari Jul 10, 2012

Introduction:

In this article I will explain how to send mail with multiple attachments in asp.net.

Description:

In previous post I explained how to send mail with attachment in asp.net. Now I will explain how to send mail with multiple attachments in asp.net. During work with one of the application I got requirement like send mail with multiple attachments in asp.net actually we can implement this concept very easily just by adding few lines of code to how to send mail with attachment in asp.net.

If we want to add multiple attachments to mail we need to write code as shown below

MailMessage Msg = new MailMessage();

Msg.From = txtFrom.Text;

Msg.To = txtTo.Text;

Msg.Subject = txtSubject.Text;

//Attaching files to email

Msg.Attachments.Add(mailAttachment);

Msg.Attachments.Add(new Attachment(fileUpload1.PostedFile.FileName));

Msg.Attachments.Add(new Attachment(fileUpload2.PostedFile.FileName));

Msg.Attachments.Add(new Attachment(fileUpload3.PostedFile.FileName));

Msg.Attachments.Add(new Attachment(fileUpload4.PostedFile.FileName));

Msg.Body = txtBody.Text;

// your remote SMTP server IP.

SmtpMail.SmtpServer = "10.120.0.21";

SmtpMail.Send(Msg);

For example check below code

<title>Send Mail with multiple attachements using asp.net</title>

</head>

<body>

<div>

<tr>

<b>Send Mail with multiple Attachments using asp.net</b>

</td>

</tr>

<tr>

<td>

Attach a file:

</td>

<td>

<asp:FileUpload ID="fileUpload1" runat="server" /><br />

<asp:FileUpload ID="fileUpload2" runat="server" /><br />

<asp:FileUpload ID="fileUpload3" runat="server" /><br />

<asp:FileUpload ID="fileUpload4" runat="server" /><br />

</td>

</tr>

<tr>

<td>

</td>

<td>

<asp:Button ID="btnSubmit" Text="Send" runat="server" onclick="btnSubmit_Click" />

</td>

</tr>

</table>

</div>

</form>

</body>

</html>

After completion of aspx page add following namespaces in codebehind

C# Code

using System;

using System.Net.Mail;

using System.Web.Mail;

using MailMessage = System.Web.Mail.MailMessage;

After that add following code in code behind

protected void Page_Load(object sender, EventArgs e)

{

}

protected void btnSubmit_Click(object sender, EventArgs e)

{

MailMessage Msg = new MailMessage();

// Sender e-mail address.

Msg.From = "administrator@aspdotnet-suresh.com";

// Recipient e-mail address.

Msg.To = "suresh@aspdotnet-suresh.com";

// Subject of e-mail

Msg.Subject = "Multiple Attachment File";

Msg.Body = "Send Mail with multiple attachements in asp.net";

Msg.Attachments.Add(new Attachment(fileUpload1.PostedFile.FileName));

Msg.Attachments.Add(new Attachment(fileUpload2.PostedFile.FileName));

Msg.Attachments.Add(new Attachment(fileUpload3.PostedFile.FileName));

Msg.Attachments.Add(new Attachment(fileUpload4.PostedFile.FileName));

// your remote SMTP server IP.

SmtpMail.SmtpServer = "10.120.0.21";

SmtpMail.Send(Msg);

}

VB.NET Code

Imports System.Net.Mail

Imports System.Web.Mail

Partial Class Default

Inherits System.Web.UI.Page

Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs)

End Sub

Protected Sub btnSubmit_Click(ByVal sender As Object, ByVal e As EventArgs)

Dim Msg As New MailMessage()

' Sender e-mail address.

Msg.From = "administrator@aspdotnet-suresh.com"

' Recipient e-mail address.

Msg.[To] = "suresh@aspdotnet-suresh.com"

' Subject of e-mail

Msg.Subject = "Multiple Attachment File"

Msg.Body = "Send Mail with multiple attachements in asp.net"

Msg.Attachments.Add(New Attachment(fileUpload1.PostedFile.FileName))

Msg.Attachments.Add(New Attachment(fileUpload2.PostedFile.FileName))

Msg.Attachments.Add(New Attachment(fileUpload3.PostedFile.FileName))

Msg.Attachments.Add(New Attachment(fileUpload4.PostedFile.FileName))

' your remote SMTP server IP.

SmtpMail.SmtpServer = "10.120.0.21"

SmtpMail.Send(Msg)

End Sub

End Class

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24 comments :

Anonymous said...: How can i find smtp server address; July 12, 2012 at 4:03 AM
Anonymous said...: Please tell me how can i know the address of SMTP server..; July 23, 2012 at 4:06 AM
Suresh Dasari said...: hi,
smtp server means that is mail server(it contains all the configurations for mail exchange) i think that one maintained by network people in your company you can get that server address from those network people.; July 23, 2012 at 4:13 AM
Anonymous said...: Please give me the solution for following error, I am facing this problem while running above mail sendin code:::

The Error is---

Unable to cast object of type 'System.Net.Mail.Attachment' to type 'System.Web.Mail.MailAttachment'.; July 23, 2012 at 4:56 AM
Suresh Dasari said...: that problem because of missing using System.Web.Mail; namespace in your code. Please check it once....; July 23, 2012 at 4:58 AM
Anonymous said...: Ok Thank you...Please give me the solution for the recent asked query; July 23, 2012 at 4:59 AM
Anonymous said...: No sir. I have written that namespace.; July 23, 2012 at 5:00 AM
Anonymous said...: I have attached all the following namespaces like...

using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

using System.Net.Mail;
using System.Web.Mail;
using MailMessage = System.Web.Mail.MailMessage;; July 23, 2012 at 5:02 AM
Anonymous said...: Is there any solution for this above problem?????; July 23, 2012 at 5:15 AM
Anonymous said...: Hi..this is very helpful coding for me..
but i have exception when i am running this code like

---Unable to cast object of type 'System.Net.Mail.Attachment' to type 'System.Web.Mail.MailAttachment'.; July 24, 2012 at 11:28 PM
Anonymous said...: Will you plz help me to solve this exception???; July 24, 2012 at 11:29 PM
Don said...: hello,

instead of using

Msg.Attachments.Add(New Attachment(fileUpload1.PostedFile.FileName));

use

Msg.Attachments.Add(new System.Web.Mail.MailAttachment(fileUpload1.PostedFile.FileName));

for all the 4 attachments

hope this will help you.; July 25, 2012 at 12:19 AM
Anonymous said...: Thanx but i had also tried this code also,it still gives the error; July 25, 2012 at 2:00 AM
Anonymous said...: Now the error comes in following statements:

SmtpMail.SmtpServer = "72.167.238.201";
SmtpMail.Send(Msg);

Exception is:
The specified protocol is unknown.

Have you a solution for this problem??; July 25, 2012 at 2:05 AM
DON said...: This Exception might be shown because of adding attachment incorrectly..

check the following url for information about this error

http://www.systemwebmail.com/faq/4.3.7.aspx

Instead of directly sending file as attachment try to save to server. and after sending email delete the file..

for e.g.

add System.IO; namespace at the top.

if (fileUpload1.PostedFile != null)
{
HttpPostedFile attFile = fileUpload1.PostedFile;
int attachFileLength = attFile.ContentLength;
if (attachFileLength > 0)
{

string strFileName = Path.GetFileName(fileUpload1.PostedFile.FileName);
fileUpload1.PostedFile.SaveAs(Server.MapPath(strFileName));
message.Attachments.Add(new System.Web.Mail.MailAttachment(Server.MapPath(strFileName)));
attach1 = strFileName;
}
}

after the email is sent delete the file

if (attach1 != null)
File.Delete(Server.MapPath(attach1));; July 25, 2012 at 3:51 AM
Anonymous said...: http://www.systemwebmail.com/faq/4.3.7.aspx; July 25, 2012 at 3:56 AM
Anonymous said...: Thanx for the help...; July 25, 2012 at 4:13 AM
Anonymous said...: Still not working properly:
Plz tell me where i am wrong.This is my code

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

using System.Net.Mail;
using System.Web.Mail;
using MailMessage = System.Web.Mail.MailMessage;

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

}
protected void btnSubmit_Click(object sender, EventArgs e)
{
MailMessage Msg = new MailMessage();
// Sender e-mail address.
Msg.From = "sweta.gandhi2010@gmail.com";

// Recipient e-mail address.
Msg.To = "sweta.gandhi2010@gmail.com";
// Subject of e-mail
Msg.Subject = "Multiple Attachment File";
Msg.Body = "Send Mail with multiple attachements in asp.net";

Msg.Attachments.Add(new System.Web.Mail.MailAttachment(Server.MapPath(fileUpload1.PostedFile.FileName)));
Msg.Attachments.Add(new System.Web.Mail.MailAttachment(Server.MapPath(fileUpload2.PostedFile.FileName)));
Msg.Attachments.Add(new System.Web.Mail.MailAttachment(Server.MapPath(fileUpload3.PostedFile.FileName)));
Msg.Attachments.Add(new System.Web.Mail.MailAttachment(Server.MapPath(fileUpload4.PostedFile.FileName)));

// your remote SMTP server IP.
SmtpMail.SmtpServer = "72.167.238.201";
SmtpMail.Send(Msg);

//SmtpClient emailClient = new SmtpClient("72.167.238.201",25);
//emailClient.Send(Msg);

}
}; July 25, 2012 at 4:24 AM
DON said...: check this URL as pasting HTML is not allowed here

http://donyogesh.blogspot.in/2012/07/email-sending-with-attachment.html; July 25, 2012 at 6:24 AM
shawn said...: but how to select multiple files at same time.
i mean in that case we have taken more uploader.
what if we need to select all the files with single asp:Fileuploader. ?; June 12, 2013 at 5:29 AM
Anonymous said...: MailMessage mail = new MailMessage("from@gmail.com","to@gmail.com","subject","body");
mail.Attachments.Add(new Attachment(FileUpload1.PostedFile.InputStream,FileUpload1.FileName));
mail.Attachments.Add(new Attachment(FileUpload2.PostedFile.InputStream, FileUpload2.FileName));
mail.Attachments.Add(new Attachment(FileUpload3.PostedFile.InputStream, FileUpload3.FileName));
mail.Attachments.Add(new Attachment(FileUpload4.PostedFile.InputStream, FileUpload4.FileName));

SmtpClient smtp = new SmtpClient("smtp.gmail.com", 587);
smtp.Credentials = new NetworkCredential("from@gmail.com", "pass.word");
smtp.EnableSsl = true;
smtp.Send(mail);
Button1.Text = "done";

try this
And thnku suresh, ur post help me a lot to ameliorate my code

NIdhi; July 21, 2013 at 1:33 AM
Unknown said...: i am trying to mail with multiple attachments but getting "filenotfoundexception was unhandled by user code" error. My code is

Dim smtpServer As New SmtpClient
Dim email As New MailMessage()
smtpServer.UseDefaultCredentials = False
smtpServer.Credentials = New Net.NetworkCredential("ankitdwivedi02@gmail.com", "ANKITrenu")
smtpServer.EnableSsl = True
smtpServer.Host = "smtp.gmail.com"

email = New MailMessage()
email.From = New MailAddress("ankitdwivedi02@gmail.com")
email.To.Add("ankitdwivedi0290@gmail.com")
email.Subject = "registration success"
email.IsBodyHtml = False
email.Body = "body message"
'Dim str As String = FileUpload1.PostedFile.FileName
email.Attachments.Add(New Attachment(FileUpload1.PostedFile.FileName))
email.Attachments.Add(New Attachment(FileUpload2.PostedFile.FileName))
email.Attachments.Add(New Attachment(FileUpload3.PostedFile.FileName))

Try
smtpServer.Send(email)
Catch ex As Exception

Console.Write(ex.Message)

End Try

Please help me out.; March 11, 2014 at 3:25 AM
SARAT said...: Hi. I need to upload the file to some location. That part was completed. After uploading when I clicking the send button, the mail has to send with the attachment of uploaded file. After sending the mail, the uploaded file has to be deleted(this part also should done on sendbutton_click event.). Please help me.....(ASP.NET); April 8, 2014 at 3:07 AM
Unknown said...: Use MailAttachment instead Attachment........; June 22, 2014 at 10:19 PM