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How do I call a method to automatically send an email in the controller?

I need to be able to send automatic emails to any users who have registered new accounts, changed passwords, and/or created new orders.
I've been given the SendEmail file, which belongs in the "Utilities" folder in my solution.
using System;
using System.Net.Mail;
using System.Net;
namespace SendEmail
{
public static class EmailMessaging
{
public static void SendEmail(String toEmailAddress, String emailSubject, String emailBody)
{
//Create a variable for YOUR TEAM'S Email address
//This is the address that will be SENDING the emails (the FROM address)
String strFromEmailAddress = "email#gmail.com";
//This is the password for YOUR TEAM'S "fake" Gmail account
String strPassword = "Password";
//This is the name of the business from which you are sending
//TODO: Change this to the name of the company you are creating the website for
String strCompanyName = "Team Final Project";
//Create an email client to send the emails
//port 587 is required to work, do not change it
var client = new SmtpClient("smtp.gmail.com", 587)
{
UseDefaultCredentials = false,
//This is the SENDING email address and password
//This will be your team's email address and password
Credentials = new NetworkCredential(strFromEmailAddress, strPassword),
EnableSsl = true
};
//Add anything that you need to the body of the message
//emailBody is passed into the method as a parameter
// /n is a new line – this will add some white space after the main body of the message
//TODO: Change or remove the disclaimer below
String finalMessage = emailBody + "\n\n Thank you, come back again soon!";
//Create an email address object for the sender address
MailAddress senderEmail = new MailAddress(strFromEmailAddress, strCompanyName);
//Create a new mail message
MailMessage mm = new MailMessage();
//Set the subject line of the message (including your team number)
mm.Subject = "Team ## - " + "Thank you!";
//Set the sender address
mm.Sender = senderEmail;
//Set the from address
mm.From = senderEmail;
//Add the recipient (passed in as a parameter) to the list of people receiving the email
mm.To.Add(new MailAddress(toEmailAddress));
//Add the message (passed)
mm.Body = finalMessage;
//send the message!
client.Send(mm);
}
}
}
My problem is that neither I nor my team members know how to implement call this from the controller in a way that will be sent automatically and with the user's email and name. We imagine they will be in the Account and Orders controllers. The accounts controller has the register and change password methods, which work, and the orders controller has the complete order method.
Also, we are not using a confirmation view, it has to be an automatic email.
We need some direction in figuring out where exactly we need to call the method from and how.
The most helpful thing I've found on the internet today is this block of code for a test message that is not intended to be sending automatic emails.
public static void CreateTestMessage(string server)
{
MailAddress from = new MailAddress("sender#gmail.com", "Team Project");
MailAddress to = new MailAddress("reciever#gmail.com", "Customer");
MailMessage message = new MailMessage(from, to);
message.Subject = "Password Changed";
message.Body = #"This is a confirmation email that your password has been changed.";
SmtpClient client = new SmtpClient(server);
client.Credentials = CredentialCache.DefaultNetworkCredentials;
try
{
client.Send(message);
}
catch (Exception ex)
{
Console.WriteLine("Exception caught in CreateBccTestMessage(): {0}",
ex.ToString());
}
}
Everything is being coded on MS VS

First create a service for EmailService and put SendEmailAsync Method in it
and call this method on your Controller.
In Method body:
1-Create your message:
var mm = new MailMessage()
2-Then you should build your smtp:
using var smtpClient = new SmtpClient();
3-Then connect it to your server
await smtpClient.ConnectAsync(
"your host",
"port",
SecureSocketOptions.SslOnConnect);
4-Now send your Email:
await smtpClient.SendAsync(mm);
5-Make sure that disconnect from your client:
await smtpClient.DisconnectAsync(true);
Note: It may give you an Exception while Connecting or Sending your Email so don't forget try catch block.
6-For Automation you can use a EmailAccount Table with relation with your Customer Table and keep your message data in it.
for ex: body ,subject..... .
In your Contorller you have your Customer So you can get his EmailAccount from DataBase and pass EmailAccount Entity to SendEmailAsync Method.
instead of creating message in body, get it from EmailAccount Entity and then countinue the Steps.
7-Enjoy it :)

How do I send a Sendgrid email using a template and add custom data for the template?

I can send a simple email, I can also send emails using a specific template w/ the TemplateId like the example below, but
QUESTION - How do I send this template below and add or include handlebar data (ex. {"name":"Mike", "url":"some_url", "date":"04/18/2022})?
FYI - I can't find any doc that shows any C# examples. I did find this link to create a transactional template but it doesn't send the email. So not sure here if this is what I'm looking for...
var client = new SendGridClient(Options.SendGridKey);
var msg = new SendGridMessage() {
From = new EmailAddress(fromEmailAddress, fromEmailName),
Subject = subject,
PlainTextContent = message,
HtmlContent = message,
TemplateId = "d-30710e173a174ab58cc641nek3c980d4c"
};
var response = await client.SendEmailAsync(msg);

The solution is that you need to remove the PlainTextContent and HtmlContent properties to make use of the template. Also, you need to provide a dynamicTemplateData object that contains your placeholders.
Here are two code examples that send dynamic template emails with and without the helper class (search for dynamic_template_data and dynamicTemplateData). So the full snippet with the mail helper class would be:
var apiKey = Environment.GetEnvironmentVariable("NAME_OF_THE_ENVIRONMENT_VARIABLE_FOR_YOUR_SENDGRID_KEY");
var client = new SendGridClient(apiKey);
var msg = new SendGridMessage();
msg.SetFrom(new EmailAddress("test#example.com", "Example User"));
msg.AddTo(new EmailAddress("test#example.com", "Example User"));
msg.SetTemplateId("d-d42b0eea09964d1ab957c18986c01828");
var dynamicTemplateData = new ExampleTemplateData
{
Subject = "Hi!",
Name = "Example User",
Location = new Location
{
City = "Birmingham",
Country = "United Kingdom"
}
};
msg.SetTemplateData(dynamicTemplateData);
var response = await client.SendEmailAsync(msg);
PS: Here is the general API documentation that explains the available properties.

How to add replyto with sendgrid in C#

I am using sendgrid with a .NET Core site I built. It has a contact form on it so a client can fill out the form and it is sent to my email address. I am using the Sendgrid nuget package to generate and send the email. The issue is that when I get the email I dont want to replyto myself and when I make the replyto equal the email address entered - sendgrid wont send the email because that email isnt entered into the Single Sender Verification. There must be a way to configure things so in my email when I click reply it will go to the person who sent the email. Right?
string key = _iConfig.GetSection("Email").GetSection("SendGridKey").Value;
var client = new SendGridClient(key);
var subject = "Form submission";
var fromemail = _iConfig.GetSection("Email").GetSection("From").Value;
var from = new EmailAddress(fromemail, model.Name);
var toemail = _iConfig.GetSection("Email").GetSection("To").Value;
var to = new EmailAddress(toemail, "Admin");
var htmlContent = "<strong>From: " + model.Name + "<br>Email: " + model.Email + "<br>Message: " + model.Message;
var msg = MailHelper.CreateSingleEmail(from, to, subject, model.Message, htmlContent);
var response = await client.SendEmailAsync(msg);
return response.IsSuccessStatusCode;

Twilio SendGrid developer evangelist here.
To set the reply-to address in C# you need the setReplyTo method, like this:
var msg = MailHelper.CreateSingleEmail(from, to, subject, model.Message, htmlContent);
// Add the reply-to email address here.
var replyTo = new EmailAddress(model.Email, model.Name);
msg.setReplyTo(replyTo);
var response = await client.SendEmailAsync(msg);
return response.IsSuccessStatusCode;

SendGrid V3 api with C#. email not sending

is there something wrong with this code? I already put my email in my code but I don't get any email.
I have a hint that is it not working because I am using API key ID instead of API key because I can't see my API key because of its only show just once. if is that the reason why is this code not working. Is there no way to view your API key again?
public string SendEmailMain()
{
SendEmail().Wait();
}
static async Task SendEmail()
{
common com = new common();
var apiKey = com.sendGridAPI;
var client = new SendGridClient(apiKey);
var from = new EmailAddress("testmail#gmail.com", "test user");
var subject = "Sending with SendGrid is Fun";
var to = new EmailAddress("testemai#gmail.com", "teset user");
var plainTextContent = "and easy to do anywhere, even with C#";
var htmlContent = "<strong>and easy to do anywhere, even with C#</strong>";
var msg = MailHelper.CreateSingleEmail(from, to, subject, plainTextContent, htmlContent);
var response = await client.SendEmailAsync(msg);
}

the code is working pretty well. The thing is i'm using the API key ID because instead of the API key that generated by sendgrid.
Please refer to this thread for more info

SendGrid "To" List email ids visible to everyone in the list

I am using SendGrid to send emails to a list of users through a console application in asp.net. I am sending a list of user's email addresses in the AddTo section while sending an email. The code looks like this:
SendGridMessage message = new SendGridMessage();
message.AddTo(new List<string>() { "user1#abc.com", "user2#xyz.com", "user3#abc.com", "user4#xyz.com" });
The email is sent as expected, but in the "To" section of the email, I am able to see all the email ids of users to whom this email was sent(image attached below). I want the email ids to be hidden so that no one misuses the other email ids in the list. Is there anyway I can accomplish this using SendGrid?

Use .AddBcc() instead of .AddTo(). BUT if you do this then you'll have to set the To address to something like "no-reply#example.com" which isn't ideal and might increase the chances of the message ending up in the SPAM or Junk folders of your users.
SO instead, write a for loop to send the email per user.
var emailAddresses = new List<string>() { "user1#abc.com", "user2#xyz.com", "user3#abc.com", "user4#xyz.com" };
for (var emailAddress in emailAddresses)
{
var email = new SendGridMessage();
email.AddTo(emailAddress);
// set other values such as the email contact
// send/deliver email
}
Is the content of the email message the same for everyone? I would assume each person would have different "monthly usage" amounts and if so the for loop would be better...

To send to multiple recipients in SendGrid without them seeing each other, you want to use the X-SMTPAPI header, as opposed to the native SMTP To header.
var header = new Header();
var recipients = new List<String> {"a#example.com", "b#exampe.com", "c#example.com"};
header.SetTo(recipients);
var subs = new List<String> {"A","B","C"};
header.AddSubstitution("%name%", subs);
var mail = new MailMessage
{
From = new MailAddress("please-reply#example.com"),
Subject = "Welcome",
Body = "Hi there %name%"
};
// add the custom header that we built above
mail.Headers.Add("X-SMTPAPI", header.JsonString());
The SMTPAPI header will be parsed by SendGrid, and each recipient will get sent a distinct single-To message.

You need to use personalization for that, there are 2 options:
var message = new SendGridMessage();
message.Personalizations = new List<Personalization>();
foreach(var email in emails)
{
var personalization = new Personalization();
personalization.AddTo(new Email(email));
}
Or:
var message = new SendGridMessage();
foreach(var email in emails)
message.AddTo(email, emails.IndexOf(email));
Alternatively you can also use MailHelper with the showAllRecipients flag:
MailHelper.CreateSingleEmailToMultipleRecipients()