We will have requirements to send email from our asp.net
applications. This article will help us understand some of the available
techniques we can use to send email from asp.net applications. With the
introduction of .Netframework 2.0, the classes for sending email are packed in
System.Net.Mail namespace as opposed to System.Web.Mail namespace in 1.x
framework.
This article will focus on following concept Simplest way of
sending email Writing HTML Email Creating Email with attachment.
Import the namespace, and create instances of required classes
We are going to use the SmtpMail
and MailMessage classes,
which belong to the System.Web.Mail
namespace. In order to use them, we will need to import the System.Web.Mail namespace like this:
<%@ Import
Namespace="System.Web.Mail" %>
Exploring the Classes in the System.Net.Mail
Namespace
There are 16 different classes in the System.Net.Mail
namespace, all related to send email to a specified Simple Mail Transfer Protocol (SMTP)
server for delivery. The two core classes in this namespace are:
MailMessage - represents an
email message; has properties like From,
To, Subject, Body, and so on.SmtpClient - sends a specified MailMessage instance to a specified
SMTP server.
When sending an email from an ASP.NET 2.0 page you will,
typically:
- Create a
MailMessage object - Assign its properties
- Create an instance of the
SmtpClient class - Specify details about the
SMTP server to use (if they're not already specified within
Web.config) - Send the
MailMessage via the SmtpClient object's Send method
Steps 1 and 2 may be bypassed as the SmtpClient
class's Send method can
accept either a MailMessage
object or four strings, representing the from, to, subject, and body contents
of the email message.
The System.Net.Mail namespace's other classes allow for more
advanced email functionality. There are classes that can be used to add
attachments to an email message, to embed objects within an email, to specify
SMTP server authentication information, and Exception-derived
classes for handling SMTP-specific exceptions.
One of the most common functionalities used in Web
development is sending email from a Web page.
Using the code
The
HTML Design contains provision to enter sender�s name, email id and his
comments. On click of the send email button the details will be sent to the
specified email .
The
Send mail functionality is similar to Dotnet 1.1 except for few changes
- System.Net.Mail.SmtpClient
is used instead of System.Web.Mail.SmtpMail (obsolete in
Dotnet 2.0).
- System.Net.MailMessage
Class is used instead of System.Web.Mail.MailMessage
(obsolete in Dotnet 2.0)
- The System.Net.MailMessage
class collects From address as MailAddress object.
- The System.Net.MailMessage
class collects To, CC, Bcc addresses as MailAddressCollection.
- MailMessage Body Format is
replaced by IsBodyHtml
.ASPX CODE:
<%@ Page
Language="C#"
AutoEventWireup="true"
CodeFile="sendmail.aspx.cs"
Inherits="sapnamalik_sendmail"
%>
<!DOCTYPE html PUBLIC
"-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title>Untitled
Page</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<table id="tblemail" runat="server" cellpadding="0" cellspacing="0" width="100%">
<tr>
<td>
<fieldset>
<legend style="border: none;
font-weight: bold; color: #660099; font-size: 12pt;
font-family:
Segoe UI">Send Your Email </legend>
<table id="tblbody" runat="server" cellpadding="2" cellspacing="2" width="100%">
<tr>
<td colspan="2" align="center">
Fields
marked with an asterisk (<asp:Label ID="Label1" runat="server" CssClass="redtext"
Text="*"></asp:Label>)are
mandatory
</td>
</tr>
<tr>
<td colspan="2" align="center">
<asp:Label ID="lblmail"
CssClass="redtext"
runat="server"></asp:Label></td>
</tr>
<tr>
<td width="10%" align="right">
<asp:Label ID="lblto" runat="server"
Text="To:"></asp:Label>
<asp:Label ID="lblredstar1"
runat="server"
CssClass="redtext"
Text="*"></asp:Label>
</td>
<td align="left"
width="90%">
<asp:TextBox ID="txtemailto"
Width="50%"
runat="server"
TabIndex="1"></asp:TextBox>
<asp:RegularExpressionValidator
ID="REVUserEMail"
runat="server"
CssClass="redtext"
Display="static"
ControlToValidate="txtemailto"
ErrorMessage="Enter
valid Email Address"
ValidationExpression="\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*"></asp:RegularExpressionValidator>
</td>
</tr>
<tr>
<td width="10%" align="right">
<asp:Label ID="lblcc" runat="server"
Text="CC:"></asp:Label>
</td>
<td align="left"
width="90%">
<asp:TextBox ID="txtemailcc"
Width="50%"
runat="server"
TabIndex="10"></asp:TextBox>
</td>
</tr>
<tr>
<td width="10%" align="right">
<asp:Label ID="lblBcc" runat="server"
Text="BCC:"></asp:Label>
</td>
<td align="left"
width="90%">
<asp:TextBox ID="txtemailbcc"
Width="50%"
runat="server"
TabIndex="10"></asp:TextBox>
</td>
</tr>
<tr>
<td width="10%" align="right">
<asp:Label ID="lblfrom"
runat="server"
Text="From:"></asp:Label>
<asp:Label ID="lblredstar3" runat="server" CssClass="redtext" Text="*"></asp:Label>
</td>
<td align="left"
width="90%">
<asp:TextBox ID="txtemailfrom"
Width="50%"
runat="server"></asp:TextBox>
<asp:RegularExpressionValidator
ID="RegularExpressionValidator1"
runat="server"
CssClass="redtext"
Display="static"
ControlToValidate="txtemailfrom"
ErrorMessage="Enter
valid Email Address"
ValidationExpression="\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*"></asp:RegularExpressionValidator>
</td>
</tr>
<tr>
<td width="10%" align="right">
<asp:Label ID="lblsubject"
runat="server"
Text="Subject:"></asp:Label>
<asp:Label ID="lblredstar4"
runat="server"
CssClass="redtext"
Text="*"></asp:Label>
</td>
<td align="left"
width="90%">
<asp:TextBox ID="txtsubject" Width="50%" runat="server"></asp:TextBox>
</td>
</tr>
<tr>
<td width="10%" align="right">
<asp:Label ID="lblAttachFile"
runat="server"
Text="File to
send:"></asp:Label>
</td>
<td align="left"
width="90%">
<input type="file" id="fileAttachement"
runat="server"
name="fileAttachement"
/>
</td>
</tr>
<tr>
<td>
</td>
<td align="left">
<asp:Button ID="btnSendEmail"
runat="server"
Width="60px"
Text="Send
Mail" OnClick="btnSendEmail_Click" />
</td>
</tr>
</table>
</fieldset>
</td>
</tr>
</table>
</div>
</form>
</body>
</html>
.CS CODE:-
using System;
using
System.Data;
using
System.Configuration;
using
System.Collections;
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;
using
System.Net.Mail;
using
System.Data.SqlClient;
using System.IO;
public partial class sapnamalik_sendmail : System.Web.UI.Page
{
SqlDataAdapter
da;
DataSet ds
= new DataSet();
SqlCommand
cmd = new SqlCommand();
SqlConnection
con;
string
FileName;
protected void Page_Load(object
sender, EventArgs e)
{
}
protected void btnSendEmail_Click(object
sender, EventArgs e)
{
if
(txtemailto.Text == "" ||
txtemailfrom.Text == "" || txtemailcc.Text
== "" || txtemailbcc.Text == "" || txtsubject.Text == "")
{
txtemailto.Focus();
lblmail.Text = "Please fill all mandatory fields.";
lblmail.Visible = true;
return;
}
sendMessage();
txtemailto.Text = "";
txtemailfrom.Text = "";
txtemailcc.Text = "";
txtemailbcc.Text = "";
txtsubject.Text = "";
}
private void sendMessage()
{
string
cc = txtemailcc.Text;
string
bcc = txtemailbcc.Text;
SmtpClient
smtpClient = new SmtpClient();
MailMessage
mailMessage = new MailMessage();
try
{
MailAddress
fromAddress = new MailAddress(txtemailfrom.Text);
mailMessage.From = fromAddress;
string
MailTo = txtemailto.Text;
mailMessage.To.Add(MailTo);
//Sending
Email with CC and BCC options
//Set the
CC address of the mail message
if
(txtemailcc.Text.Trim().Length != 0)
mailMessage.CC.Add(txtemailcc.Text);
//Set the
BCC address of the mail message
if
(txtemailbcc.Text.Trim().Length != 0)
mailMessage.Bcc.Add(txtemailbcc.Text);
mailMessage.Subject = txtsubject.Text;
//Sending
Email with Attachment facility
if
(fileAttachement.PostedFile != null)
{
HttpPostedFile
AttachFile = fileAttachement.PostedFile;
int
AttachFileLength = AttachFile.ContentLength;
if
(AttachFileLength > 0)
{
FileName = Path.GetFileName(fileAttachement.PostedFile.FileName);
}
}
//Note:
When you make "IsBodyHtml" to true make
//ValidateRequest="false"
in page derective
//As to
make HTML content passed.
string
Body = "";
Body += '\n'
+ "Email:" + txtemailfrom.Text;
Body += '\n'
+ "";
mailMessage.IsBodyHtml = true;
mailMessage.Body = Body;
//Sending
Email with Reply-To options
//Setting
Reply address.
if
(txtemailto.Text.Trim().Length != 0)
{
mailMessage.Headers.Add("Reply-To", txtemailto.Text);
}
else
{
mailMessage.Headers.Add("Reply-To", txtemailto.Text);
}
smtpClient.Host = "localHost";
smtpClient.Send(mailMessage);
lblmail.Visible = true;
lblmail.Text = "Your mail has been sent successfully";
tblemail.Visible = true;
}
catch (Exception ex)
{
lblmail.Visible = true;
lblmail.Text = "There has been some error, please try again after
some time.";
}
}
}
Output:
![mailsending.bmp]()