Sending Email in .NET

Author: James Foster

Date Posted: 09/05/2001

.NET Version: 1.0.3705

If you've had to send email with regular ASP, you've probably used CDONTS. In .NET, this functionality has been rolled into the Framework, and is part of the System.Web.Mail namespace. Using the classes in this namespace, you can easily construct and send email, with attachments if you wish, using the SMTP service built into Windows.

System.Web.Mail Namespace

The System.Web.Mail namespace is composed of three classes and three enumerations.

Classes:

MailAttachment	Represents the attachments of an email.
MailMessage	Represents the email itself.
SmtpMail	Responsible for sending MailMessages via SMTP.

Enumerations:

MailEncoding	Specifies the Encoding of the message: Base64 or UUEncode
MailFormat	Specifies the Format of the message: Html or Text
MailPriority	Specifies the Priority of the message: High, Medium, or Low.

Constructing the MailMessage

The MailMessage object represents an email. You start by instantiating a MailMessage object, and then set the properties with the details of the email. The following properties are the ones you are most likely to use in your application:

Attachments	the list of attachments (represented by MailAttachment objects) that are transmitted with the email
Bcc	a semicolon-delimited list of email addresses that receive a Blind Carbon Copy (BCC) copy of the email message
Body	the body of the email
BodyFormat	specifies the MailFormat of the email
Cc	a semicolon-delimited list of email addresses that receive a Carbon Copy (CC) of the email message
From	the email address of the sender
Priority	specifies the MailPriority of the email
Subject	the subject of the email
To	the email address of the recipient
UrlContentBase	the URL base of all relative URL's used in an Html Body
UrlContentLocation	Specifies the Priority of the message: High, Medium, or Low.

Sending with SmtpMail

Once you have constructed your MailMessage object, you use another object, SmtpMail, to actually send it. The most important method on the SmtpMail object is a static method, Send. This method has two variants. One allows you to send a MailMessage object:

SmtpMail.Send(myEmailObject);

Another variant allows you to specify the sender, recipient, subject and the body of an email, and have it sent right away.

SmtpMail.Send(strFrom, strTo, strSubject, strBody);

Example

Now let's look at an example that pulls this all together. We'll start by creating a MailMessage object, setting a few properties, and finally sending the email with the SmtpMail object.

< %@ Page Language = "C#" %>

< script language = "C#" runat = "server">

void Page_Load ( )
{
     // CREATE A MAIL MESSAGE
    System .Web .Mail .MailMessage myEmail = new System .Web .Mail .MailMessage ( ) ;

     // SET MESSAGE PARAMETERS
     myEmail .From = "[email protected]" ;
     myEmail .To = "[email protected]" ;
     myEmail .Subject = "Product Availability Notice" ;
     myEmail .BodyFormat = System .Web .Mail .MailFormat .Html ;
     myEmail .Body = "The sunglasses you expressed interest in are now in stock." ;

     //SEND THE MESSAGE
    System .Web .Mail .SmtpMail .Send ( myEmail ) ;

     //UPDATE STATUS
     lblMailStatus .Text = "Mail successfully sent." ;
}

< / script>

< html>
< body>

< asp :Label id = "lblMailStatus" runat = "server" />

< / body>
< / html>

< %@ Page Language = "VB" %>

< script language = "VB" runat = "server">

Sub Page_Load ( )
     'CREATE A MAIL MESSAGE
     Dim myEmail as System . Web . Mail . MailMessage = new System . Web . Mail . MailMessage ( )

     'SET MESSAGE PARAMETERS
     myEmail . From = "[email protected]"
     myEmail . To = "[email protected]"
     myEmail . Subject = "Product Availability Notice"
     myEmail . BodyFormat = System . Web . Mail . MailFormat . Html
     myEmail . Body = "The sunglasses you expressed interest in are now in stock."

     'SEND THE MESSAGE
     System . Web . Mail . SmtpMail . Send ( myEmail )

     'UPDATE STATUS
     lblMailStatus . Text = "Mail successfully sent."
End Sub

< / script>

< html>
< body>
    < asp : Label id = "lblMailStatus" runat = "server" />
< / body>
< / html>

Sending Email in .NET

Sending Email in .NET

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