Sending Emails using web.config file’s credential
Introduction
It is very easy to send
emails from ASP.Net using any language like VB or C#, but there is no any
article which explains that how to use credentials from web.config file. In
general, to send email we also use to type the sender’s email ID that is FROM
address. It is very bored work to do the same thing always. There should be any
other way to define the FROM email address once, like in web.config file and
use it entirely in website. Let’s take a look.
Perquisite
To understand this project, you should have general email sending technique. Because, in this article, basics are not covered.
Credentials
To call the credentials from web.config file we use to write
Dim mysmtp As New System.Net.Mail.SmtpClient()
in Default.aspx.vb page. And in web.config file we use to write the following
<system.net>
<mailSettings>
<smtp>
<network
host="smtp.domainname.com"
userName="[email protected]"
password="xxxxxxxxx"
port="25"/>
</smtp>
</mailSettings>
</system.net>
Above codes should be placed within <configuration> tag.
FROM
address in web.config file
In web.config file we use to write the following
In above code value should be same as username in very above coding, key is just a calling name used inside Default.aspx.vb page as follows
mailmsg.From
= New System.Net.Mail.MailAddress(txtFrom.Text.Trim())
mailmsg.From
= New System.Net.Mail.MailAddress
(System.Configuration.ConfigurationSettings.AppSettings("mydefaultFROM"))
In above coding, use any one, like, if you want to use textbox on form to write FROM email address then use 'red' colored coding but want to use web.config file use below the 'red' colored coding.
Default.aspx
Coding
<%@
Page Language="VB" AutoEventWireup="false"
CodeFile="Default.aspx.vb" Inherits="_Default" %>
<!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>Sending Email with Attachement
in ASP.Net using VB Language</title>
</head>
<body>
<form id="form1"
runat="server">
<div>
<strong><span
style="text-decoration: underline; font-size: 14pt; color:
#3300ff;">Sending Email with Attachement in ASP.Net using
VB Language</span></strong><br
/>
<br />
<span style="font-size: 10pt;
font-family: Verdana"><strong>Note:</strong> Please note
that, in this project I have used
to way to represent the FROM address. First way
is to write the from address at run
time and second one is to include the from address
in web.config file and the same
mention in Default.aspx.vb page, it will work perfectly
with giving FROM address at
runtime. From address can be any mail id. </span>
<br />
<br />
<table style="width: 465px;
height: 61px" bgcolor="#dcdcdc">
<tr>
<td style="width:
66px">
</td>
<td style="width:
76px">
<br />
<asp:Label
ID="lblInfo" runat="server" Width="212px"
Font-Names="Berlin Sans FB Demi"
ForeColor="Red"></asp:Label><br />
</td>
<td style="width:
53px">
</td>
</tr>
<tr>
<td style="width:
66px">
From:</td>
<td style="width:
76px">
<asp:TextBox
ID="txtFrom"
runat="server"></asp:TextBox></td>
<td style="width:
53px">
</td>
</tr>
<tr>
<td style="width:
66px">
To:</td>
<td style="width:
76px">
<asp:TextBox
ID="txtTo"
runat="server"></asp:TextBox></td>
<td style="width:
53px">
</td>
</tr>
<tr>
<td style="width:
66px">
Subject:</td>
<td style="width:
76px">
<asp:TextBox
ID="txtSubject"
runat="server"></asp:TextBox></td>
<td style="width:
53px">
</td>
</tr>
<tr>
<td style="width:
66px">
Message:</td>
<td style="width:
76px">
<asp:TextBox
ID="txtMessage" runat="server" Height="60px"
TextMode="MultiLine"
Width="199px"></asp:TextBox></td>
<td style="width:
53px">
</td>
</tr>
<tr>
<td style="width:
66px">
Attachement:</td>
<td style="width:
76px">
<asp:FileUpload
ID="FileUpload1" runat="server" /></td>
<td style="width:
53px">
</td>
</tr>
<tr>
<td style="width:
66px">
</td>
<td style="width:
76px">
</td>
<td style="width:
53px">
</td>
</tr>
<tr>
<td style="width:
66px">
</td>
<td style="width:
76px">
<asp:Button
ID="send" runat="server" Text="Send"
Width="78px" /></td>
<td style="width:
53px">
</td>
</tr>
</table>
</div>
</form>
</body>
</html>
Default.aspx.vb
Coding
Partial
Class _Default
Inherits System.Web.UI.Page
Protected Sub send_Click
(ByVal sender As Object, ByVal e As System.EventArgs) Handles send.Click
(ByVal sender As Object, ByVal e As System.EventArgs) Handles send.Click
If txtTo.Text = "" Or
txtMessage.Text = "" Then
lblInfo.Text = "Complete your
email."
Else
'******************************************************************
'declaring the mailing class
'******************************************************************
Dim mailmsg As
System.Net.Mail.MailMessage = New System.Net.Mail.MailMessage()
'******************************************************************
'declaring the FROM email address
we can also define the standard
'******************************************************************
'Normal FROM email address using
(only one can run at once)
'------------------------------------------------------------------
mailmsg.From = New
System.Net.Mail.MailAddress(txtFrom.Text.Trim())
'FROM address in web.config file
and then we can call that as
'-----------------------------------------------------------------
'mailmsg.From = New
System.Net.Mail.MailAddress(System.Configuration.ConfigurationSettings.AppSettings("mydefaultFROM"))
'*****************************************************************
'declaring the TO email address,
there can be multiple email addresses
'*****************************************************************
mailmsg.To.Add(New
System.Net.Mail.MailAddress(txtTo.Text.Trim()))
'mailmsg.CC.Add
'mailmsg.BCC.Add
'mailmsg.ReplyTo.Add
'*****************************************************************
'declaring the Subject of email
'*****************************************************************
mailmsg.Subject =
txtSubject.Text.Trim()
'*****************************************************************
'declaring the Mail Body of email,
here we can change to send
'the database data or form result
as we can say
'*****************************************************************
mailmsg.Body =
txtMessage.Text.Trim()
'*****************************************************************
'sending attachements
'*****************************************************************
'mailmsg.Attachments.Add(New
System.Net.Mail.Attachment("C:\abhi.txt"))
If FileUpload1.HasFile = True Then
Dim fu As FileUpload =
FileUpload1
Dim ct As String =
fu.PostedFile.ContentType
'Get file name from fully
qualified file name
Dim fn As String =
fu.PostedFile.FileName
Dim c As Integer =
fn.LastIndexOf("\")
fn = fn.Substring(c 1)
mailmsg.Attachments.Add(New
System.Net.Mail.Attachment(fu.PostedFile.InputStream, fn, ct))
End If
'*****************************************************************
'setting up the smpt configuration
'Dim mysmtp As
System.Net.Mail.SmtpClient = New System.Net.Mail.SmtpClient()
'*****************************************************************
Dim mysmtp As New
System.Net.Mail.SmtpClient()
'****************************************************************
'final step to send email
'****************************************************************
Try
mysmtp.Send(mailmsg)
Catch mysmtpexp As
System.Net.Mail.SmtpException
'log error details will be here
Catch ex As Exception
'log error details will be here
End Try
'****************************************************************
'display the message for
conformation
'****************************************************************
lblInfo.Text = "Email
Sent"
End If
End Sub
End Class
Web.config
Coding
<?xml
version="1.0"?>
<configuration>
<appSettings>
<add key="mydefaultFROM"
value="[email protected]"/>
</appSettings>
<connectionStrings/>
<system.web>
<compilation
debug="true"/>
<authentication
mode="Windows"/>
</system.web>
<system.net>
<mailSettings>
<smtp>
<network
host="smtp.domainname.com"
userName="[email protected]"
password="xxxxxxxxx"
port="25"/>
</smtp>
</mailSettings>
</system.net>
</configuration>
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