Howto Send E-mail from an ASPX Page


NOTE: the concepts presented in this article are now considered obsolete possibly because better alternatives are available.

This article will show you how simple it is to send an e-mail from an ASPX page. With just a few lines of code, you can add mail sending capabilities to your ASP.NET page in your website. Sample code is in C#.
Sending e-mail from your website has never been easier before. No more hassle with (commercial) third-party components, or difficult configuration settings. This mini-tutorial will show the steps you need to perform to send an e-mail from an ASP.NET web page.

Prerequisites

This article (and many others on this site) assumes the following prerequisites:
  • Visual Studio .NET 2002 or 2003
  • The .NET Framework 1.0 or 1.1

Please note: this article was written against .NET 1.x; many years ago. For a .NET 2.0 or later solution, check out www.systemnetmail.com/.

Sending e-mail

To send an E-mail from an ASPX page, you'll need to use the System.Web.Mail namespace that contains the MailMessage and SmtpMail classes. The MailMessage class represent the actual message and the SmtpMail class is used to send the message to one or more recipients.

Let's take a look at the code of a simple example to see how it works. We'll start with the ASPX file, called SendMail.aspx:

<%@ Page language="c#" Codebehind="SendMail.aspx.cs" 
        AutoEventWireup="false" Inherits="Demos.Email.SendMail" %>
<!doctype html public "-//w3c//dtd html 4.0 transitional//en" >
<html>
<head>
  <title>Send an E-mail with ASP.NET</title>
</head>
<body>
  <form id="frmSendEmail" method="post" runat="server">
    Your name: <asp:textbox id="txtName" runat="server"></asp:textbox><br>
    Your message: <asp:textbox id="txtMessage"
          runat="server"textmode="MultiLine"></asp:textbox><br>
    <asp:button id="btnSubmit" runat="server"
          text="Send E-mail"></asp:button>
    <asp:label id="lblErrorMessage" runat="server"
          visible="False"></asp:label>
</form>
</body>
</html>
As you can see, this page is pretty simple. All it does is create two text boxes, a button and a label. The text boxes are for the name of your visitor and for the message they want to send to you. The button will submit the form to the server where the e-mail will be sent. Notice that the label, lblErrorMessage, is hidden by default. It's used to display an error message to the user when they forget either their name or the message.

The important bits of this example can be found in the Code Behind file for this page, SendMail.aspx.cs:

using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
using System.Web.Mail; namespace Demos.Email
As usual in a Code Behind, a couple of namespaces are imported. You'll see all of them in a regular ASP.NET page, except for the System.Web.Mail entry. This namepsace is required when you want to send an e-mail.

{
/// <summary>
 /// Simple demo class that sends an e-mail
 /// </summary>
  public class SendMail : System.Web.UI.Page
  {
    protected System.Web.UI.WebControls.TextBox txtName;
    protected System.Web.UI.WebControls.Label lblErrorMessage;
    protected System.Web.UI.WebControls.TextBox txtMessage;

    private void Page_Load(object sender, System.EventArgs e)
    {
The controls you added to the ASPX page are declared in the Code Behind as well, so you have programmatic access to them.

      if (IsPostBack)
{
    string name = txtName.Text;
      string message = txtMessage.Text;
      if(name.Length == 0 || message.Length ==0)
      {
      lblErrorMessage.Text = "Please type your name and a message";
        lblErrorMessage.Visible = true;
      }
      else
      {
      message = "This e-mail was sent by " + name + "\r\n" + message;
The fields that are required are checked for the length. If either one of them is empty, the message will not be submitted, but an error message is displayed instead. Note that you could use ASP.NET Validation controls for this, but for the sake of simplicity, I left them out here.

          MailMessage objMail = new MailMessage();

       objMail.From = "Your From Name <You@YourProvider.com>";
        objMail.To = "Your To Name <You@YourProvider.com>";
        objMail.Subject = "Response from website";
        objMail.Body = message;
        SmtpMail.SmtpServer = "smtp.YourProvider.com";
        SmtpMail.Send(objMail);
        Response.Redirect("ThankYou.aspx");
Once you know that you have some valid values, you can create a new MailMessage object. You'll need to set at least a To and a From, a Subject and the Body to make it a useful message. The SmtpServer is the server that actually sends the e-mail message. You can use the name of the SMTP server of your provider here. Alternatively, if you have an SMTP server at your local machine, you can add localhost here.

        }
    }
  }   #region Web Form Designer generated code
  override protected void OnInit(EventArgs e)
  {
//
   // CODEGEN: This call is required by the ASP.NET Web Form Designer.
   //
   InitializeComponent();
   base.OnInit(e);
}

  /// <summary>
 /// Required method for Designer support - do not modify
  /// the contents of this method with the code editor.
  /// </summary>
  private void InitializeComponent()
  {
this.Load += new System.EventHandler(this.Page_Load);
  }
  #endregion
}
}
The code ends with some regular ASP.NET page stuff, like the Required Design support code, and the Load handler for the current page. When you save, compile and run this page, you can fill in your name and a message and hit the Send E-mail button. The code in the Page_Load event will fire, and your e-mail will be sent.

Required Namespaces

Download Files


Where to Next?

Wonder where to go next? You can read existing comments below or you can post a comment yourself on this article .


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Feedback by Other Visitors of Imar.Spaanjaars.Com

On Wednesday, October 17, 2007 5:46:39 PM sunil said:
hi ,
i wnt to make same comment form in my web project , and collect this comment as a email in my gmail account ........can u help me....to make

pls sendme code ...........thanks
On Thursday, January 24, 2008 3:19:40 PM James said:
I have Visual Studio 2005 with IIS 5.1 and .NET framework 2.0

I downloaded the source files, placed them into my local web directory, but I cannot even get to the 1st page.  I get a Server Error in my Application:

Parser Error
Description: An error occurred during the parsing of a resource required to service this request. Please review the following specific parse error details and modify your source file appropriately.

Parser Error Message: Could not load type 'Demos.Email.SendMail'.

Source Error:


Line 1:  *@ Page language="c#" Codebehind="SendMail.aspx.cs" AutoEventWireup="false" Inherits="Demos.Email.SendMail" *
Line 2:  *!doctype html public "-//w3c//dtd html 4.0 transitional//en" *
Line 3:  *html*


Source File: /Website1/SendMail/Send E-mail with ASP.NET/SendMail.aspx    Line: 1

=====================================

Just want to be able to test.  Can you help?  Of course I replaced the < with * just so I can submit this msg.

Thank you,

James
On Thursday, January 24, 2008 7:01:34 PM Imar Spaanjaars said:
Hi James,

This article was written against Visual Studio 2003 which uses a different project model. Instead of just placing the files under a web root, you need to compile them first.

My suggestion:

1. Start VS 2005
2. Choose File | New Project or File | New | Project
3. Choose ASP.NET Web Application
4. Manually copy the relevant code (not the entire page) from the source files into your new project.

Hope this helps.

Imar
On Tuesday, July 15, 2008 1:34:45 PM himanshu said:
how to send information given in a textbox to your own mail id in asp.net
On Tuesday, July 15, 2008 1:49:16 PM Imar Spaanjaars said:
Hi himanshu,

What???? Did you even try to read this article before you posted?

Imar
On Monday, December 23, 2013 1:56:13 PM Minh Duc said:
Thank you1
On Tuesday, July 15, 2014 12:22:13 PM viuv said:
nothing to say , Not sending message

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