I have an interface for sending mails
public interface IMailSender
{
void SendMail(MailMessage message);
}
When I create a mail I use AlternateView for that (plain text and html)
And now I would like to create a SendGridMailSender class that implements that interface, but my problem is that I don't know how to I populate the SendGrid.Html and SendGrid.Text based on the MailMessage. The only solution I could find means using a StreamReader and accesing the AlternateViewsCollection by index, I would like to thing there's a better solution that I can't figure out.
public void SendMail(MailMessage message)
{
var sendGridMessage = CreateSendGridMessage(message);
// Create network credentials to access your SendGrid account.
var user = "userCredential";
var pswd = "userPaswd";
var credentials = new NetworkCredential(user, pswd);
// Create an SMTP transport for sending email.
var transportSMTP = SMTP.GetInstance(credentials);
// Send the email.
transportSMTP.Deliver(sendGridMessage);
}
private SendGrid CreateSendGridMessage(MailMessage mail)
{
var sendGridMessage = SendGrid.GetInstance();
sendGridMessage.From = mail.From;
var recipients = mail.To;
foreach (var recipient in recipients)
{
sendGridMessage.AddTo(recipient.ToString());
}
var stream = mail.AlternateViews[0].ContentStream;
using (var reader = new StreamReader(stream))
{
sendGridMessage.Text = reader.ReadToEnd();
}
stream = mail.AlternateViews[1].ContentStream;
using (var reader = new StreamReader(stream))
{
sendGridMessage.Html = reader.ReadToEnd();
}
return sendGridMessage;
}
Thanks
The only way to access the AlternateView content is through the stream, so your solution is correct, although you should also check the ContentType to ensure that mail.AlternateViews[0] is in fact your Text part and so on.
Have you thought about using the official C# library instead? It makes it super simple to do what you're trying to do
// Create the email object first, then add the properties.
var myMessage = SendGrid.GetInstance();
// Add the message properties.
myMessage.From = new MailAddress("john#example.com");
// Add multiple addresses to the To field.
List<String> recipients = new List<String>
{
#"Jeff Smith <jeff#example.com>",
#"Anna Lidman <anna#example.com>",
#"Peter Saddow <peter#example.com>"
};
myMessage.AddTo(recipients);
myMessage.Subject = "Testing the SendGrid Library";
//Add the HTML and Text bodies
myMessage.Html = "<p>Hello World!</p>";
myMessage.Text = "Hello World plain text!";
https://github.com/sendgrid/sendgrid-csharp
Related
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.
I am using C#, 4.7.1 FW, and the SendGrid nuget.
I have been in contact with SG support and so far have not yet been directed to or figured out how to send a template. I have tried to use the native MailMessage, and also the SendGridMessage.
I have my template id specified and I keep running into problems where the email fails and I am told "Substitutions may not be used with dynamic templating"
Here is the latest snippet I am bashing my head against a brick wall over:
var apiKey = "snip";
var client = new SendGridClient(apiKey);
var from = new EmailAddress("from#domain.com", "display name");
var subject = "Sending an email template";
var to = new EmailAddress("me#domain.com", "To Name");
var plainTextContent = "";
var htmlContent = ""; // I read htmlContent needs to be blank?
var msg = MailHelper.CreateSingleEmail(from, to, subject, plainTextContent, htmlContent);
Personalization p = new Personalization
{
Substitutions = new Dictionary<string, string>()
};
p.Substitutions.Add("[eventname]", "test event"); // my template has 3 subs, this is one of them
p.Tos = new List<EmailAddress>();
p.Tos.Add(to);
msg.Personalizations.Add(p);
msg.SetTemplateId("snip");
var response = await client.SendEmailAsync(msg);
var stringResponse = response.Body.ReadAsStringAsync();
Response:
{"errors":[{"message":"Substitutions may not be used with dynamic templating","field":"personalizations.1.substitutions","help":"http://sendgrid.com/docs/API_Reference/Web_API_v3/Mail/errors.html#message.personalizations.substitutions"}]}
I am this close to just reverting all of this to building my own HTML template and storing that in a database, pulling it and replacing the placeholders like [eventname] with values. This shouldn't be this hard.
I am trying to send email with SendGrid to multiple recipients in an ASP.Net C# web application
According to the SendGrid documentation I need to add X-SMTPAPI header to my message in JSON formatted string. I do so, for first check I just added a hand-typed string before building my json email list progamatically here is my code:
string header = "{\"to\": [\"emailaddress2\",\"emailaddress3\"], \"sub\": { \"%name%\": [\"Ben\",\"Joe\"]},\"filters\": { \"footer\": { \"settings\": { \"enable\": 1,\"text/plain\": \"Thank you for your business\"}}}}";
string header2 = Regex.Replace(header, "(.{72})", "$1" + Environment.NewLine);
var myMessage3 = new SendGridMessage();
myMessage3.From = new MailAddress("emailaddress1", "FromName");
myMessage3.Headers.Add("X-SMTPAPI", header2);
myMessage3.AddTo("emailaddress4");
myMessage3.Subject = "Test subject";
myMessage3.Html = "Test message";
myMessage3.EnableClickTracking(true);
// Create credentials, specifying your user name and password.
var credentials = new NetworkCredential(ConfigurationManager.AppSettings["xxxxx"], ConfigurationManager.AppSettings["xxxxx"]);
// Create an Web transport for sending email.
var transportWeb = new Web(credentials);
// Send the email, which returns an awaitable task.
transportWeb.DeliverAsync(myMessage3);
But it just seems to ignore my header, and sends the email to the one email "emailaddress4" used in "addto".
According the documentation if the header JSON is parsed wrongly, then SendGrid sends an email about the error to the email address set in "FROM" field, but I get no email about any error.
Anyone got any idea?
For me using the latest 9.x c# library the only way I could solve this was by using the MailHelper static functions like this:
var client = new SendGridClient(HttpClient, new SendGridClientOptions { ApiKey = _sendGridApiKey, HttpErrorAsException = true });
SendGridMessage mailMsg;
var recipients = to.Split(',').Select((email) => new EmailAddress(email)).ToList();
if (recipients.Count() > 1)
{
mailMsg = MailHelper.CreateSingleEmailToMultipleRecipients(
new EmailAddress(from),
recipients,
subject,
"",
body);
}
else
{
mailMsg = MailHelper.CreateSingleEmail(
new EmailAddress(from),
recipients.First(),
subject,
"",
body);
}
if (attachment != null)
{
mailMsg.AddAttachment(attachment.Name,
attachment.ContentStream.ToBase64(),
attachment.ContentType.MediaType);
}
var response = await client.SendEmailAsync(mailMsg).ConfigureAwait(false);
if (response.IsSuccessStatusCode)
{
_log.Trace($"'{subject}' email to '{to}' queued");
return true;
}
else {
throw new HttpRequestException($"'{subject}' email to '{to}' not queued");
}
I'm not sure why you wouldn't recieve any errors at your FROM address, but your JSON contains the following flaws:
, near the end makes the string invalid json
spaces around the first % in %name%, that might make sendgrid think it's an invalid substitution tag
if you use the X-SMTPAPI header to specify multiple recipients, you are not supposed to add a standard SMTP TO using AddTo().
Besides that, you didn't wrap the header at 72 characters (see the example in the documentation).
I figured that however the X-SMTPAPI documentation talks about passing the header as JSON, the API itself expects it as a parameter, containing Ienumerable string. So the working code is:
var myMessage3 = new SendGridMessage();
myMessage3.From = new MailAddress("email4#email.com", "Test Sender");
myMessage3.AddTo("email2#email.com");
myMessage3.Subject = "Új klubkártya regisztrálva";
myMessage3.Html = "Teszt üzenet";
myMessage3.EnableClickTracking(true);
/* SMTP API
* ===================================================*/
// Recipients
var addresses = new[]{
"email2#email.com", "email3#email.com"
};
//string check = string.Join(",", addresses);
myMessage3.Header.SetTo(addresses);
// Create credentials, specifying your user name and password.
var credentials = new NetworkCredential(ConfigurationManager.AppSettings["xxxxxxx"], ConfigurationManager.AppSettings["xxxxxxxxx"]);
// Create an Web transport for sending email.
var transportWeb = new Web(credentials);
// Send the email, which returns an awaitable task.
transportWeb.DeliverAsync(myMessage3);
I am working on web form which collects certain user information from users and sends confirmation by email. I am trying to user the following approach to send the HTML email as it make managing HTML based email easy.
https://gist.github.com/1668751
I made necessary changes to the code but it is not working. I read other related article to make it work but i am doing something wrong.
Following line of code generates error The replacements dictionary must contain only strings.
MailMessage msgHtml = mailDef.CreateMailMessage(to, replacements, MessageBody, new System.Web.UI.Control());
I have made many change to the code but it doesnt seem to work for me. I would appreciate help to make this code work.
If i comment the above line of code with some other changes then i can send email but i can't replace the token. Any easy approach to replace token is also welcome.
Below is the Complete code i am using right now
String to, subject, Name;
subject = "Booking Confirmation";
Name = txtName.text;
ListDictionary replacements = new ListDictionary();
replacements.Add("<%Name%>", Name);
replacements.Add("<%Email%>", objVR.Email);
replacements.Add("<%CompanyName%>", objVR.CompanyName);
replacements.Add("<%BookingDate%>", objVR.BookingDate);
replacements.Add("<%BookingTime%>", objVR.TimeSlot);
replacements.Add("<%NoOfVisitors%>", objVR.NoOfVisitors);
replacements.Add("<%BookingCode%>", objVR.BookingUniqueID);
MailDefinition mailDef = new MailDefinition();
string MessageBody = String.Empty;
string filePath = System.Web.HttpContext.Current.Request.PhysicalApplicationPath;
using (StreamReader sr = new StreamReader(filePath + #"\en\VREmailEnglish.htm"))
{
MessageBody = sr.ReadToEnd();
}
MailMessage msgHtml = mailDef.CreateMailMessage(to, replacements, MessageBody, new System.Web.UI.Control());
string message = msgHtml.Body.ToString();
Helper.SendTokenEmail(to, subject, msgHtml, isHtml);
public static void SendTokenEmail(string to, string subject, string mailMessage, bool isHtml)
{
try
{
// Create a new message
var mail = new MailMessage();
// Set the to and from addresses.
mail.From = new MailAddress("noreply#somedomain.net");
mail.To.Add(new MailAddress(to));
// Define the message
mail.Subject = subject;
mail.IsBodyHtml = isHtml;
mail.Body = mailMessage.ToString();
//Object userState = mailMessage;
// Create a new Smpt Client using Google's servers
var mailclient = new SmtpClient();
mailclient.Host = "mail.XYZ.net";
//mailclient.Port = 587; //ForGmail
mailclient.Port = 2525;
mailclient.EnableSsl = false;
mailclient.UseDefaultCredentials = true;
// Specify your authentication details
mailclient.Credentials = new System.Net.NetworkCredential("noreply#somedomain.net", "XYZPassword");
mailclient.Send(mail);
mailclient.Dispose();
}
catch (Exception ex)
{
}
}
As pointed out by HatSoft the ListDictionary accepts objects as key and value so this looks like it should work.
But reading the docs for the CreateMailMessage() method here http://msdn.microsoft.com/en-us/library/0002kwb2.aspx indicates you need to convert the value to a string otherwise it will throw an ArgumentException.
So to fix make sure all values you add to the ListDictionary are converted to string i.e
objVR.BookingDate.ToString()
My issue is this that I am trying to make use of email sending task at my website for the admin individual.
When he selects the email ids from the available data, adds an attachment and sends the email, it was never received by user. However, if he is using simple mailing ie. without any attachment, user receives it.
Can you help please ?
My coding is given below :-
public partial class SahibAdmin_emailNewsletter : System.Web.UI.Page
{
// ...
private void SendNewsletter(string emailId)
{
System.Web.Mail.MailMessage message = new System.Web.Mail.MailMessage();
message.To = emailId;
message.From = "info#sahibimports.com";
message.Subject = "Please See: Newsletter from Sahib imports";
message.BodyFormat = System.Web.Mail.MailFormat.Text;
message.Body = txtBody.Text.ToString();
if (msgUpload.HasFile)
{
//string strFileName = msgUpload.FileName;
//msgUpload.PostedFile.SaveAs(Server.MapPath(strFileName));
//System.Web.Mail.MailAttachment attach =
// new System.Web.Mail.MailAttachment(Server.MapPath(strFileName));
//message.Attachments.Add(attach);
message.Attachments.Add(new Attachment(
FileUpload.PostedFile.InputStream, FileUpload.FileName));
}
System.Web.Mail.SmtpMail.Send(message);
Response.Flush();
}
According to http://msdn.microsoft.com/en-us/library/6sdktyws.aspx your Attachment constructor is trying to set the ContentType with the second parameter but you're passing in a filename, are you sure that is correct?
You should probably change that part to something like:
ContentType contentType = // create suitable type here based on your file format
Attachment attachment = new Attachment(
FileUpload.PostedFile.InputStream,
contentType
);
attachment.ContentDisposition.FileName = FileUpload.FileName;
message.Attachments.Add(attachment);
You are trying to use System.Net.Mail.Attachment with System.Web.Mail.MailMessage.
These API`s are incompatible with each other. System.Web.Mail.MailMessage only supports System.Web.Mail.MailAttachment, not System.Net.Mail.Attachment.