In this article I will explain with an example, how to send email with SMTP in ASP.Net Core (.Net Core 7) Razor pages.
Mail Server Settings in AppSettings.json file
The following Mail Server settings need to be saved in the AppSettings.json file.
{
"Smtp": {
"Server": "smtp.gmail.com",
"Port": 587,
"EnableSsl": true,
"DefaultCredentials": false
}
}
Sending Email using Gmail SMTP
MailMessage class properties
Following are the required properties of the MailMessage class.
From – Sender’s email address.
To – Recipient(s) Email Address.
CC – Carbon Copies. (If any)
BCC – Blind Carbon Copies. (If any)
Subject – Subject of the Email.
Body – Body of the Email.
IsBodyHtml – Specify whether body contains text or HTML mark up.
Attachments – Attachments. (If any)
ReplyTo – ReplyTo Email address.
SMTP class properties
Following are the properties of the SMTP class.
Host – SMTP Server URL. (Gmail: smtp.gmail.com)
EnableSsl – Specify whether your host accepts SSL Connections. (Gmail: True)
UseDefaultCredentials – Set to True in order to allow authentication based on the Credentials of the Account used to send emails.
Credentials – Valid login credentials for the SMTP server. (Gmail: email address and password)
Port – Port Number of the SMTP server. (Gmail: 587)
Model
The Model class consists of following properties.
public class EmailModel
{
public string To { get; set; }
public string Subject { get; set; }
public string Body { get; set; }
public string Email { get; set; }
public string Password { get; set; }
}
Namespaces
You will need to import the following namespaces.
using System.Net;
using System.Net.Mail;
Razor PageModel (Code-Behind)
The PageModel consists of following Handler methods.
Handler method for handling GET operation
This Handler method left empty as it is not required.
Handler method for handling POST operation
Inside this Handler method, the posted values are captured through the EmailModel class object. All the fetched values are set into an object of the MailMessage class.
Setting Body of Email
The Body of the email is Text (Non HTML) hence the IsBodyHtml property of MailMessage class is set to FALSE.
Sending Email
Then, an object of the SmtpClient class is created and the values of Host, Port, EnableSsl and UseDefaultCredentials are fetched from the SMTP section of the AppSettings.json file and set to the respective properties of SmtpClient class along with the Credentials.
Finally, the
Send method is executed which sends the Email and a success message is set to a
ViewData object.
public class IndexModel : PageModel
{
public EmailModel Model { get; set; }
public IConfiguration Configuration { get; set; }
public IndexModel(IConfiguration _configuration)
{
this.Configuration = _configuration;
}
public void OnGet()
{
}
public void OnPostSendEmail(EmailModel model)
{
string host = this.Configuration.GetValue<string>("Smtp:Server");
int port = this.Configuration.GetValue<int>("Smtp:Port");
bool enableSsl = this.Configuration.GetValue<bool>("Smtp:EnableSsl");
bool defaultCredentials = this.Configuration.GetValue<bool>("Smtp:DefaultCredentials");
using (MailMessage mm = new MailMessage(model.Email, model.To))
{
mm.Subject = model.Subject;
mm.Body = model.Body;
mm.IsBodyHtml = false;
using (SmtpClient smtp = new SmtpClient())
{
smtp.Host = host;
smtp.Port = port;
smtp.EnableSsl = enableSsl;
smtp.UseDefaultCredentials = defaultCredentials;
NetworkCredential networkCred = new NetworkCredential(model.Email, model.Password);
smtp.Credentials = networkCred;
smtp.Send(mm);
}
}
ViewData["Message"] = "Email sent.";
}
}
Razor Page (HTML)
HTML Markup
Inside the Razor Page, the ASP.Net TagHelpers is inherited.
method – It specifies the Form Method i.e. GET or POST. In this case it will be set to POST.
The Form consists of HTML TextBox, TextArea, FileUpload element and a Submit Button.
The Submit Button has been set with the POST Handler method using the asp-page-handler attribute.
Note: In the Razor PageModel, the Handler method name is OnPostSendEmail but here it will be specified as SendEmail when calling from the Razor HTML Page.
When the Send Button is clicked, the Form gets submitted and the Model object is sent to the PageModel.
Finally, the
ViewData object is checked for NULL and if it is not NULL then the value of the object is displayed using
JavaScript Alert Message Box.
@page
@model Send_Email_Core_Razor.Pages.IndexModel
@addTagHelper*, Microsoft.AspNetCore.Mvc.TagHelpers
@{
Layout = null;
}
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width" />
<title>Index</title>
</head>
<body>
<form method="post">
<table>
<tr>
<td style="width: 80px">To:</td>
<td><input type="text" asp-for="Model.To" /></td>
</tr>
<tr><td> </td></tr>
<tr>
<td>Subject:</td>
<td><input type="text" asp-for="Model.Subject" /></td>
</tr>
<tr><td> </td></tr>
<tr>
<td valign="top">Body:</td>
<td><textarea cols="20" rows="3" asp-for="Model.Body"></textarea></td>
</tr>
<tr><td> </td></tr>
<tr>
<td>Gmail Email:</td>
<td><input type="text" asp-for="Model.Email" /></td>
</tr>
<tr><td> </td></tr>
<tr>
<td>Gmail Password:</td>
<td><input type="password" asp-for="Model.Password" /></td>
</tr>
<tr><td> </td></tr>
<tr>
<td></td>
<td><input type="submit" value="Send" asp-page-handler="SendEmail" /></td>
</tr>
</table>
</form>
@if (ViewData["Message"] != null)
{
<script type="text/javascript">
window.onload = function () {
alert("@ViewData["Message"]");
};
</script>
}
</body>
</html>
Screenshot
Email Form
![ASP.Net Core Razor Pages: Send Email using SMTP]()
Received Email
![ASP.Net Core Razor Pages: Send Email using SMTP]()
Downloads
