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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.

ArgumentNullException for address when sending email using NetCore.MailKit

I am using NetCore.MailKit NuGet package to help me send an email which contains a link to confirm their email when the user registers. I have followed the steps on their Github page but, I am getting an ArgumentNullException for the address, even though I have set the sending address.
The error:
ArgumentNullException: Value cannot be null. (Parameter 'address')
MimeKit.MailboxAddress..ctor(Encoding encoding, string name, string address)
The above error occurs when is send the email in my controller using IEmailService:
_EmailService.Send("usersemail#gmail.com", "subject", "message body");
This is my appsettings.json configuration:
"EmailConfiguration": {
"Server": "smtp.gmail.com",
"Port": 587,
"SenderName": "name",
"SenderEmail": "mygmail#gmail.com",
"SenderPassword": "My gmail password"
}
This is my setup in startup.cs
services.AddMailKit(optionBuilder =>
{
optionBuilder.UseMailKit(new MailKitOptions()
{
//get options from sercets.json
Server = Configuration["Server"],
Port = Convert.ToInt32(Configuration["Port"]),
SenderName = Configuration["SenderName"],
SenderEmail = Configuration["SenderEmail"],
Account = Configuration["SenderEmail"],
Password = Configuration["SenderPassword"],
Security = true
});
});
Below is the code for EmailService:
public void Send(string mailTo, string subject, string message, bool isHtml = false)
{
SendEmail(mailTo, null, null, subject, message, Encoding.UTF8, isHtml);
}
private void SendEmail(string mailTo, string mailCc, string mailBcc, string subject, string message, Encoding encoding, bool isHtml)
{
var _to = new string[0];
var _cc = new string[0];
var _bcc = new string[0];
if (!string.IsNullOrEmpty(mailTo))
_to = mailTo.Split(',').Select(x => x.Trim()).ToArray();
if (!string.IsNullOrEmpty(mailCc))
_cc = mailCc.Split(',').Select(x => x.Trim()).ToArray();
if (!string.IsNullOrEmpty(mailBcc))
_bcc = mailBcc.Split(',').Select(x => x.Trim()).ToArray();
Check.Argument.IsNotEmpty(_to, nameof(mailTo));
Check.Argument.IsNotEmpty(message, nameof(message));
var mimeMessage = new MimeMessage();
//add mail from
mimeMessage.From.Add(new MailboxAddress(_MailKitProvider.Options.SenderName, _MailKitProvider.Options.SenderEmail));
//add mail to
foreach (var to in _to)
{
mimeMessage.To.Add(MailboxAddress.Parse(to));
}
//add mail cc
foreach (var cc in _cc)
{
mimeMessage.Cc.Add(MailboxAddress.Parse(cc));
}
//add mail bcc
foreach (var bcc in _bcc)
{
mimeMessage.Bcc.Add(MailboxAddress.Parse(bcc));
}
//add subject
mimeMessage.Subject = subject;
//add email body
TextPart body = null;
if (isHtml)
{
body = new TextPart(TextFormat.Html);
}
else
{
body = new TextPart(TextFormat.Text);
}
//set email encoding
body.SetText(encoding, message);
//set email body
mimeMessage.Body = body;
using (var client = _MailKitProvider.SmtpClient)
{
client.Send(mimeMessage);
}
}
As you can see I have set everything, am I missing something here? why is address null at MimeKit.MailboxAddress()?

You seem to be not loading your configuration settings correctly. I suspect the failing line in your code is
//add mail from
mimeMessage.From.Add(new MailboxAddress(_MailKitProvider.Options.SenderName, _MailKitProvider.Options.SenderEmail));
The Options are all null, which causes the exception.
When you load the settings from a configuration file you need to prepend the section name to the variables. E.G.
services.AddMailKit(optionBuilder =>
{
optionBuilder.UseMailKit(new MailKitOptions()
{
//get options from sercets.json
Server = Configuration["EmailConfiguration:Server"],
Port = Convert.ToInt32(Configuration["EmailConfiguration:Port"]),
SenderName = Configuration["EmailConfiguration:SenderName"],
SenderEmail = Configuration["EmailConfiguration:SenderEmail"],
Account = Configuration["EmailConfiguration:SenderEmail"],
Password = Configuration["EmailConfiguration:SenderPassword"],
Security = true
});
});

My guess is that the exception is being thrown on the following line:
mimeMessage.From.Add(new MailboxAddress(_MailKitProvider.Options.SenderName, _MailKitProvider.Options.SenderEmail));
This means that _MailKitProvider.Options.SenderEmail is null.
I know you expect these values to be loaded correctly from your appsettings.json file, but seemingly, they are not being loaded for some reason.

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

Sending e-mail from Gmail in Xamarin.Forms app

I am trying to send e-mail from within a Xamarin Forms app, using Gmail.
I have created an Interface with only 1 method: SendEmail();
Then, in the Droid project, I added a class which implements said interface. Using the Dependency attribute and getting the implementation of the method in the main project, all is fine, except the following error:
Could not resolve host 'smtp.gmail.com'
This is the actual implementation of the method:
string subject = "subject here ";
string body= "body here ";
try
{
var mail = new MailMessage();
var smtpServer = new SmtpClient("smtp.gmail.com", 587);
mail.From = new MailAddress("myEmailAddress#gmail.com");
mail.To.Add("anotherAddress#yahoo.com");
mail.Subject = subject;
mail.Body = body;
smtpServer.Credentials = new NetworkCredential("username", "pass");
smtpServer.UseDefaultCredentials = false;
smtpServer.EnableSsl = true;
smtpServer.Send(mail);
}
catch (Exception ex)
{
System.Diagnostics.Debug.WriteLine(ex);
}
Searching around I could not find any details regarding it other that the actual smtp address.
Also, I have used the Less Secure apps procedure from Google, not receiving a credentials error I assume that it can connect to the account just fine.

Hello I have achieve this using the code below, also I have attached a file to the email, using the dependency service I use this methods:
Android:
public static string ICSPath
{
get
{
var path = Path.Combine(Android.OS.Environment.ExternalStorageDirectory.AbsolutePath, StaticData.CalendarFolderName);
if (!Directory.Exists(path))
Directory.CreateDirectory(path);
return Path.Combine(path, StaticData.CalendarFileName);
}
}
public async Task<bool> ShareCalendarEvent(List<ISegment> segmentList)
{
Intent choserIntent = new Intent(Intent.ActionSend);
//Create the calendar file to attach to the email
var str = await GlobalMethods.CreateCalendarStringFile(segmentList);
if (File.Exists(ICSPath))
{
File.Delete(ICSPath);
}
File.WriteAllText(ICSPath, str);
Java.IO.File filelocation = new Java.IO.File(ICSPath);
var path = Android.Net.Uri.FromFile(filelocation);
// set the type to 'email'
choserIntent.SetType("vnd.android.cursor.dir/email");
//String to[] = { "asd#gmail.com" };
//emailIntent.putExtra(Intent.EXTRA_EMAIL, to);
// the attachment
choserIntent.PutExtra(Intent.ExtraStream, path);
// the mail subject
choserIntent.PutExtra(Intent.ExtraSubject, "Calendar event");
Forms.Context.StartActivity(Intent.CreateChooser(choserIntent, "Send Email"));
return true;
}
iOS:
public static string ICSPath
{
get
{
var path = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.Personal), StaticData.CalendarFolderName);
if (!Directory.Exists(path))
Directory.CreateDirectory(path);
return Path.Combine(path, StaticData.CalendarFileName);
}
}
public async Task<bool> ShareCalendarEvent(List<ISegment> segmentList)
{
//Create the calendar file to attach to the email
var str = await GlobalMethods.CreateCalendarStringFile(segmentList);
if (File.Exists(ICSPath))
{
File.Delete(ICSPath);
}
File.WriteAllText(ICSPath, str);
MFMailComposeViewController mail;
if (MFMailComposeViewController.CanSendMail)
{
mail = new MFMailComposeViewController();
mail.SetSubject("Calendar Event");
//mail.SetMessageBody("this is a test", false);
NSData t_dat = NSData.FromFile(ICSPath);
string t_fname = Path.GetFileName(ICSPath);
mail.AddAttachmentData(t_dat, #"text/v-calendar", t_fname);
mail.Finished += (object s, MFComposeResultEventArgs args) =>
{
//Handle action once the email has been sent.
args.Controller.DismissViewController(true, null);
};
Device.BeginInvokeOnMainThread(() =>
{
UIApplication.SharedApplication.KeyWindow.RootViewController.PresentViewController(mail, true, null);
});
}
else
{
//Handle not being able to send email
await App.BasePageReference.DisplayAlert("Mail not supported",
StaticData.ServiceUnavailble, StaticData.OK);
}
return true;
}
I hope this helps.

Figured it own finally!
First of all, I was using Android Player by Xamarin, which apparently does not support network connectivity.
So my fix was easy: used an Android Emulator ( any version of it for that matter ) built in Visual Studio Community 2015, and tested network connectivity using the plugin by James Montemagno ( Xam.Plugin.Connectivity on NuGet ).

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"));