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Send Generated Pdf as Email Attachment Asp.NetCore

I am using Rotativa to convert my view to pdf. I would like to send that generated pdf as an email attachment (without having to download it first to disk). I've been following a bunch of tutorials to do this but I just keep going round in circles. I would much appreciate any help I can get.
public async Task<IActionResult>SomeReport()
{
...
return new ViewAsPdf (report)
}
return view();
MemoryStream memoryStream = new MemoryStream();
MimeMessage msg = new MimeMessage();
MailboxAddress from = new MailboxAddress ("Name", "emailAddress")
msg.From.Add(from);
MailboxAddress to = new MailboxAddress ("Name", "emailAddress")
msg.From.Add(to);
BodyBuilder bd = new BodyBuilder();
bb.HtmlBody ="some text";
bb.Attachments.Add("attachmentName", new MemoryStream());
msg.Body = bb.ToMessageBody();
SmtpClient smtp = new SmtpClient();
smtp.Connect("smtp.gmail.com",465, true);
smtp.Authenticate("emailAddress", "Pwd");
smtp.Send(msg);
smtp.Disconnect(true);
smtp.Dispose();
Edit
Parent View from which Email is sent
#Model MyProject.Models.EntityViewModel
<a asp-action= "SendPdfMail" asp-controller ="Student" asp-route-id = "#Model.Student.StudentId">Email</a>
...
SendPdfMail action in Student Controller
public async Task<IActionResult> SendPdfMail(string id)
{
var student = await context.Student. Where(s => s.StudentId == id);
if (student != null)
{
...
var viewAsPdf = new ViewAsPdf("MyPdfView", new{route = id})
{
Model = new EntityViewModel(),
FileName = PdfFileName,
...
}
}
};

Complete answer using Rotativa.AspNetCore. Code is developed in VS 2019, Core 3.1, Rotativa.AspNetCore 1.1.1.
Nuget
Install-package Rotativa.AspNetCore
Sample controller
public class SendPdfController : ControllerBase
{
private const string PdfFileName = "test.pdf";
private readonly SmtpClient _smtpClient;
public SendPdfController(SmtpClient smtpClient)
{
_smtpClient = smtpClient;
}
[HttpGet("SendPdfMail")] // https://localhost:5001/SendPdfMail
public async Task<IActionResult> SendPdfMail()
{
using var mailMessage = new MailMessage();
mailMessage.To.Add(new MailAddress("a#b.c"));
mailMessage.From = new MailAddress("c#d.e");
mailMessage.Subject = "mail subject here";
var viewAsPdf = new ViewAsPdf("view name", <YOUR MODEL HERE>)
{
FileName = PdfFileName,
PageSize = Size.A4,
PageMargins = { Left = 1, Right = 1 }
};
var pdfBytes = await viewAsPdf.BuildFile(ControllerContext);
using var attachment = new Attachment(new MemoryStream(pdfBytes), PdfFileName);
mailMessage.Attachments.Add(attachment);
_smtpClient.Send(mailMessage); // _smtpClient will be disposed by container
return new OkResult();
}
}
Options class
public class SmtpOptions
{
public string Host { get; set; }
public int Port { get; set; }
public string Username { get; set; }
public string Password { get; set; }
}
In Startup#ConfigureServices
services.Configure<SmtpOptions>(Configuration.GetSection("Smtp"));
// SmtpClient is not thread-safe, hence transient
services.AddTransient(provider =>
{
var smtpOptions = provider.GetService<IOptions<SmtpOptions>>().Value;
return new SmtpClient(smtpOptions.Host, smtpOptions.Port)
{
// Credentials and EnableSsl here when required
};
});
appsettings.json
{
"Smtp": {
"Host": "SMTP HOST HERE",
"Port": PORT NUMBER HERE,
"Username": "USERNAME HERE",
"Password": "PASSWORD HERE"
}
}

There's not quite enough to go on, but you need something like this:
MimeMessage msg = new MimeMessage();
MailboxAddress from = new MailboxAddress ("Name", "emailAddress");
msg.From.Add(from);
MailboxAddress to = new MailboxAddress ("Name", "emailAddress");
msg.To.Add(to);
BodyBuilder bb = new BodyBuilder();
bb.HtmlBody ="some text";
using (var wc = new WebClient())
{
bb.Attachments.Add("attachmentName",wc.DownloadData("Url for your view goes here"));
}
msg.Body = bb.ToMessageBody();
using (var smtp = new SmtpClient())
{
smtp.Connect("smtp.gmail.com",465, true);
smtp.Authenticate("emailAddress", "Pwd");
smtp.Send(msg);
smtp.Disconnect(true);
}
Notice this adds the attachment before calling .ToMessageBody(), as well as fixing at least four basic typos.
But I doubt this will be enough... I suspect ViewAsPdf() needs more context than you get from a single DownloadData() request, and you'll need to go back to the drawing board to be able to provide that context, but this at least will help push you in the right direction.

SMTP class CC readonly is coming when sending email?

i want to send the Email and using smtp class and i want to Cc also but getting Cc is a read only property.my code below
System.Net.Mail.MailMessage MyMailMessage = new System.Net.Mail.MailMessage();
MyMailMessage.From = new System.Net.Mail.MailAddress(this.SenderAddress);
MyMailMessage.CC = new System.Net.Mail.MailAddress(this.CcAddress);
string m_CcAddress = null;
public string CcAddress {
get {
return this.m_CcAddress; }
set {
this.m_CcAddress = value;
}
}

Correct, cc is a list, not a String.. So you normally would have
myMailMessage.cc.Add(m_CcAddress);
As demonstrated by Microsoft

Create a list of disposable emails

I'm sending emails with asp.net core 2.0 like this
public string EmailServiceSend(string body, string subject = null, string to = null,
string multipleRecipients = null, string attachmentUrl = null, string smtpClient = null,
string userCredential = null, string userPassword = null, string from = null, bool template = false,
string templateRoute = null)
{
try
{
SmtpClient client = new SmtpClient("mysmtpserver");
client.UseDefaultCredentials = false;
client.Credentials = new NetworkCredential("username", "password");
MailMessage mailMessage = new MailMessage();
mailMessage.From = new MailAddress("whoever#me.com");
mailMessage.To.Add("receiver#me.com");
mailMessage.Body = body;
mailMessage.Subject = subject;
client.Send(mailMessage);
}
catch(Exception ex)
{
ex.Message.ToString();
}
return "Email sended"
}
I want to know, how can I create a list of email domains to block and send an error message. For example I want to block this domains:
0-mail.com
0815.ru
0clickemail.com
0wnd.net
and then send a response into my return statement for example:
if(listofblockmails == true){
return "You can't add this email domain, change it please"
}
How can I achieve that? Regards

Try using Linq:
Lets say you have this List:
List<string> listofblockmails = new List<string>();
listofblockmails.Add("0-mail.com");
listofblockmails.Add("0815.ru");
listofblockmails.Add("0clickemail.com");
listofblockmails.Add("0wnd.net");
You can do as below:
if (listofblockmails.Contains("emailToBeChecked.com"))
{
//return "You can't add this email domain, change it please";
}
else
{
//send
//return "Email sended";
}
And let Garbage collector do the disposal.

You can simply parse the email address and get the domain part, and compare againist a list of bad domains. If the domain is present in your bad domain list, return messge.
You can create a method like this.
private bool IsGoodDomain(string email)
{
if (string.IsNullOrEmpty(email))
return false;
var badDomains = new List<string>
{
"0815.ru",
"0wnd.net"
};
var r = email.Split('#');
if (!r.Any()) return false;
var domainName = r.Last();
return !badDomains.Contains(domainName, StringComparer.InvariantCultureIgnoreCase);
}
and call this method in your other method
if(IsGoodDomain(someEmailAddressVariable))
{
//contnue sending
}
else
{
// return the error message
}

MailMessage Attachment filename with accents

I'm trying to send HTML e-mails with attached Excel filenames. It all worked well until I neded to send messages whose attachment name contains accented letters :-( Every workaround I've tried failed miserably.
Original code:
var attachment = new Attachment(
new MemoryStream(excelFileContents),
"simplefilename.xls");
This one works fine.
However if I replace "simplefilename.xls" by "échec.xls", the attachment is garbaged (name and contents).
I tried these, to no avail:
var attachment = new Attachment(
new MemoryStream(excelFileContents),
new System.Net.Mime.ContentType("application/vnd.ms-excel"));
attachment.Name = "échec.xls";
The last one is even worse: SmtpClient.Send() throws an exception, complaining about the é in the filename:
var attachment = new Attachment(
new MemoryStream(excelFileContents),
new System.Net.Mime.ContentType("application/vnd.ms-excel"));
attachment.ContentDisposition.FileName = "échec.xls";
I've been banging my head on this one for way too long. Any lights warmly welcomed!

I finally came across an answer that worked.
http://social.msdn.microsoft.com/Forums/en-US/dotnetframeworkde/thread/b6c764f7-4697-4394-b45f-128a24306d55
The content is in German except for the post by Marcel Roma. I put in his code into my application. I was able to send out pdf with accents and we were to see the attachment instead of garbage.
So here it is:
public class AttachmentHelper
{
public static System.Net.Mail.Attachment CreateAttachment(string attachmentFile, string displayName, TransferEncoding transferEncoding)
{
System.Net.Mail.Attachment attachment = new System.Net.Mail.Attachment(attachmentFile);
attachment.TransferEncoding = transferEncoding;
string tranferEncodingMarker = String.Empty;
string encodingMarker = String.Empty;
int maxChunkLength = 0;
switch (transferEncoding)
{
case TransferEncoding.Base64:
tranferEncodingMarker = "B";
encodingMarker = "UTF-8";
maxChunkLength = 30;
break;
case TransferEncoding.QuotedPrintable:
tranferEncodingMarker = "Q";
encodingMarker = "ISO-8859-1";
maxChunkLength = 76;
break;
default:
throw (new ArgumentException(String.Format("The specified TransferEncoding is not supported: {0}", transferEncoding, "transferEncoding")));
}
attachment.NameEncoding = Encoding.GetEncoding(encodingMarker);
string encodingtoken = String.Format("=?{0}?{1}?", encodingMarker, tranferEncodingMarker);
string softbreak = "?=";
string encodedAttachmentName = encodingtoken;
if (attachment.TransferEncoding == TransferEncoding.QuotedPrintable)
encodedAttachmentName = HttpUtility.UrlEncode(displayName, Encoding.Default).Replace("+", " ").Replace("%", "=");
else
encodedAttachmentName = System.Convert.ToBase64String(Encoding.UTF8.GetBytes(displayName));
encodedAttachmentName = SplitEncodedAttachmentName(encodingtoken, softbreak, maxChunkLength, encodedAttachmentName);
attachment.Name = encodedAttachmentName;
return attachment;
}
private static string SplitEncodedAttachmentName(string encodingtoken, string softbreak, int maxChunkLength, string encoded)
{
int splitLength = maxChunkLength - encodingtoken.Length - (softbreak.Length * 2);
var parts = SplitByLength(encoded, splitLength);
string encodedAttachmentName = encodingtoken;
foreach (var part in parts)
encodedAttachmentName += part + softbreak + encodingtoken;
encodedAttachmentName = encodedAttachmentName.Remove(encodedAttachmentName.Length - encodingtoken.Length, encodingtoken.Length);
return encodedAttachmentName;
}
private static IEnumerable<string> SplitByLength(string stringToSplit, int length)
{
while (stringToSplit.Length > length)
{
yield return stringToSplit.Substring(0, length);
stringToSplit = stringToSplit.Substring(length);
}
if (stringToSplit.Length > 0) yield return stringToSplit;
}
}
Use it in the following way:
static void Main(string[] args)
{
string smtpServer = String.Empty;
string userName = String.Empty;
string password = String.Empty;
string attachmentFilePath = String.Empty;
string displayName = String.Empty;
System.Net.Mail.SmtpClient client = new System.Net.Mail.SmtpClient(smtpServer);
client.Credentials = new System.Net.NetworkCredential(userName, password);
var msg = new System.Net.Mail.MailMessage(fromAddress, toAddress, "Subject", "Body");
System.Net.Mail.Attachment attachment =
AttachmentHelper.CreateAttachment(attachmentFilePath, displayName, TransferEncoding.Base64);
msg.Attachments.Add(attachment);
client.Send(msg);
}

You need to use the Quoted-Printable format for the attachment name:
C#: Class for decoding Quoted-Printable encoding?
http://www.codeproject.com/KB/security/TextCoDec.aspx

Standard emailer class?

I'm going through my app, trying to clean up some code that sends e-mails. I started creating my own emailer wrapper class, but then I figured that there must be a standard emailer class out there somewhere. I've done some searching, but couldn't find anything.
Also, is there a code base for stuff like this anywhere?
EDIT: Sorry, let me clarify.
I don't want to have this in my code any time I need to send an e-mail:
System.Web.Mail.MailMessage message=new System.Web.Mail.MailMessage();
message.From="from e-mail";
message.To="to e-mail";
message.Subject="Message Subject";
message.Body="Message Body";
System.Web.Mail.SmtpMail.SmtpServer="SMTP Server Address";
System.Web.Mail.SmtpMail.Send(message);
I created a class named Emailer, that contains functions like:
SendEmail(string to, string from, string body)
SendEmail(string to, string from, string body, bool isHtml)
And so I can just put this a single line in my code to send an e-mail:
Emailer.SendEmail("name#site.com", "name2#site.com", "My e-mail", false);
I mean, it's not too complex, but I figured there was a standard, accepted solution out there.

Something like this?
using System;
using System.Net;
using System.Net.Mail;
using System.Net.Mime;
using MailMessage=System.Net.Mail.MailMessage;
class CTEmailSender
{
string MailSmtpHost { get; set; }
int MailSmtpPort { get; set; }
string MailSmtpUsername { get; set; }
string MailSmtpPassword { get; set; }
string MailFrom { get; set; }
public bool SendEmail(string to, string subject, string body)
{
MailMessage mail = new MailMessage(MailFrom, to, subject, body);
var alternameView = AlternateView.CreateAlternateViewFromString(body, new ContentType("text/html"));
mail.AlternateViews.Add(alternameView);
var smtpClient = new SmtpClient(MailSmtpHost, MailSmtpPort);
smtpClient.Credentials = new NetworkCredential(MailSmtpUsername, MailSmtpPassword);
try
{
smtpClient.Send(mail);
}
catch (Exception e)
{
//Log error here
return false;
}
return true;
}
}

Maybe you're looking for SmtpClient?

I use a generic class made out of this old Stack Overflow Answer.
Try this.
public bool SendEmail(MailAddress toAddress, string subject, string body)
{
MailAddress fromAddress = new MailAddress("pull from db or web.config", "pull from db or web.config");
string fromPassword = "pull from db or config and decrypt";
string smtpHost = "pull from db or web.config";
int smtpPort = 587;//gmail port
try
{
var smtp = new SmtpClient
{
Host = smtpHost,
Port = smtpPort,
EnableSsl = true,
DeliveryMethod = SmtpDeliveryMethod.Network,
UseDefaultCredentials = false,
Credentials = new NetworkCredential(fromAddress.Address, fromPassword)
};
using (var message = new MailMessage(fromAddress, toAddress)
{
Subject = subject,
Body = body,
IsBodyHtml = true
})
{
smtp.Send(message);
}
return true;
}
catch (Exception err)
{
Elmah.ErrorSignal.FromCurrentContext().Raise(err);
return false;
}
}

This is a snippet from one of my projects. It's a little more feature-packed than some of the other implementations.
Using this function allows you to create an email with:
Tokens that can be replaced with actual values at runtime
Emails that contain both a text and HTML view
public MailMessage createMailMessage(string toAddress, string fromAddress, string subject, string template)
{
// Validate arguments here...
// If your template contains any of the following {tokens}
// they will be replaced with the values you set here.
var replacementDictionary = new ListDictionary
{
// Replace with your own list of values
{ "{first}", "Pull from db or config" },
{ "{last}", "Pull from db or config" }
};
// Create a text view and HTML view (both will be in the same email)
// This snippet assumes you are using ASP.NET (works w/MVC)
// if not, replace HostingEnvironment.MapPath with your own path.
var mailDefinition = new MailDefinition { BodyFileName = HostingEnvironment.MapPath(template + ".txt"), IsBodyHtml = false };
var htmlMailDefinition = new MailDefinition { BodyFileName = HostingEnvironment.MapPath(template + ".htm"), IsBodyHtml = true };
MailMessage htmlMessage = htmlMailDefinition.CreateMailMessage(email, replacementDictionary, new Control());
MailMessage textMessage = mailDefinition.CreateMailMessage(email, replacementDictionary, new Control());
AlternateView plainView = AlternateView.CreateAlternateViewFromString(textMessage.Body, null, "text/plain");
AlternateView htmlView = AlternateView.CreateAlternateViewFromString(htmlMessage.Body, null, "text/html");
var message = new MailMessage { From = new MailAddress(from) };
message.To.Add(new MailAddress(toAddress));
message.Subject = subject;
message.AlternateViews.Add(plainView);
message.AlternateViews.Add(htmlView);
return message;
}
Assuming you have your Web.config set up for NetMail, you can call this method from a helper method like so:
public bool SendEmail(MailMessage email)
{
var client = new SmtpClient();
try
{
client.Send(message);
}
catch (Exception e)
{
return false;
}
return true;
}
SendMail(createMailMessage("to#email.com", "from#email.com", "Subject", "~/Path/Template"));