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Not getting any clue to integrate Gmail API using .NET framework in vs2017. I wanted to send the input data of the Web form to a user's email .

The official Gmail API documentation is horrendous. Not getting any clue to integrate Gmail API using .NET framework in vs2017. I wanted to send the input data of the Web form to a user's email.

It would be a three step process -
Define an HTML template which which describes how your mail should be presented.
Write a small c# code to replace all place holders like your form fields , user name, etc.
private string createEmailBody(string userName, string title, string message)
{
string body = string.Empty;
//using streamreader for reading my htmltemplate
using(StreamReader reader = new StreamReader(Server.MapPath("~/HtmlTemplate.html")))
{
body = reader.ReadToEnd();
}
body = body.Replace("{UserName}", userName); //replacing the required things
body = body.Replace("{Title}", title);
body = body.Replace("{message}", message);
//// Instead of message add you own parameters.
return body;
}
When form is submitted, call step 2 code first. Then use it's output to set mail body.
Code would be something like -
string smtpAddress = "smtp.gmail.com";
int portNumber = 587;
bool enableSSL = true;
/// This mail from can just be a display only mail I'd
string emailFrom = "no-reply#gmail.com";
string subject = "your subject";
string body = createEmailBody();
using (MailMessage mail = new MailMessage())
{
mail.From = new MailAddress(emailFrom);
mail.To.Add(emailTo);
/// Add more to IDs if you want to send it to multiple people.
mail.Subject = subject;
mail.Body = body;
mail.IsBodyHtml = true;
// This is required to keep formatting of your html contemts
/// Add attachments if you want, this is optional
mail.Attachments.Add(new Attachment(yourfilepath));
using (SmtpClient smtp = new SmtpClient(smtpAddress, portNumber))
{
smtp.Credentials = new NetworkCredential(your-smtp-account-email, your-smtp-account-password);
smtp.EnableSsl = enableSSL;
smtp.Send(mail);
}
}
Refer this link for working example
https://www.c-sharpcorner.com/UploadFile/33b051/sending-mail-with-html-template/
EDIT: For using GMail API
Using GMAIL APIs you will need two nuget packages:
1. Install-Package Google.Apis.Gmail.v1
2. Install-Package AE.Net.Mail
Code is very similar to what we have for normal SMTP mail send. It is explained at: http://jason.pettys.name/2014/10/27/sending-email-with-the-gmail-api-in-net-c/

Secure Email in C#

I have a code for sending email through code, its as follows:
string subject = "SecureEmail: URS Scheduler - ";
string body = #"Message: My Message";
try
{
SmtpClient sm = new SmtpClient();
MailMessage msg = new MailMessage();
//msg.SubjectEncoding.
sm.Host = "email.myhost.com";
//Add Sender
msg.From = new MailAddress("abc#myhost.com");
//Add reciepents
sendMailToUsers(msg, "pqr#myhost.com");
//send message
msg.IsBodyHtml = true;
msg.Subject = subject;
msg.Body = body;
sm.Send(msg);
I am able to send message but its not encrypted, its a plain Text.
When I go to my Outlook mail client and Send Mail with above recipients and body, and subject starting with "SecureEmail:", I get an Encrypted Email with a button "Open Message". When I click on Open Message it redirects me to https://web1.zixmail.net/s/e?b=domain&m=encrypted msg and other info,then I login into it and and able to see the plain text of mail body.
Please help me in getting above behaviour through my code.

Your company is using ZixMail, and your Outlook has a plugin to enable this. If you want to send ZixMail from C#, you'll need to use their toolset and API. Reffer to ZixMail documentation and support.

Add a different 'reply to' Email address in MailDefinition C#

I am using Windows Form Application which is sending HTML emails using MailDefinition Class.
MailDefinition mailDefinition = new MailDefinition();
mailDefinition.BodyFileName = strfilename;
mailDefinition.From = "email#company.com";
Is it possible that somehow I can add a different email id where user will reply. I don't want the users to reply on this email#company.com email id.
I am looking for some thing like this:
mail.Headers.Add( "Reply-To", "alternate_email#mycompany.com")

I use the System.Net.Mail.SmtpClient class which has a send method that takes a System.Net.Mail.MailMessage parameter.
In the MailMessage class it has: replyTo and replyToList properties.
Add HTML content like this:
System.Net.Mail.MailMessage m = new System.Net.Mail.MailMessage();
m.Body = "HTML Content";
m.IsBodyHtml = true;

Email id address issue in c# code

I wrote a simple program in C# Winforms for sending an email and my code is mentioned below:-
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
public MailMessage rtnMail()
{
string to = txt_To.Text;
string from = txt_From.Text;
string subject = txt_Subject.Text;
string body = txt_Body.Text;
MailMessage message = new MailMessage(from, to, subject, body);
return message;
}
//Button click event
private void btn_Send_Click(object sender, EventArgs e)
{
SmtpClient smtp = new SmtpClient("smtp.gmail.com");
smtp.Port = 587;
smtp.Credentials = new System.Net.NetworkCredential("myanotherid#gmail.com", "password");
smtp.EnableSsl = true;
smtp.Timeout = 500000;
smtp.Send(this.rtnMail());
}
}
when i run this code and put all the values in textboxes like (to, from, body, subject) and click the "Send" button i do end up getting an email at an address
mentioned in the Textbox named txt_To ( which is my recipient gmail account id).But whenever i look at which address(email id) i got this email from in Microsoft
Outlook (which i have configued for my gmail recipeint account), it always says that i got this email from the email address mentioned as first argument in the line of
code below,
smtp.Credentials = new System.Net.NetworkCredential("myanotherid#gmail.com", "password");
My question is, am i doing anything wrong because i expect that email address from which im receiving an email( in my outlook gmail) should be the one that i put in
TextBox named txt_From rather than from "myanotherid#gmail.com" address.
Is there a work around or does there exist an alternate to it.

I guess it's gmail's protection to prevent sender spoofing.
You can't login to GMail as yogibear#gmail.com and send an e-mail as barack.obama#whitehouse.gov. GMail's SMTP will rewrite the message's header to properly indicate who has really sent the e-mail.

You should use new mailaddress();
MailAddress from = new MailAddress("someone#something.com", "John Doe");
MailAddress to = new MailAddress("someoneelse#something.com", "Jane Doe");
MailMessage mail = new MailMessage(from, to);
further reading here: http://msdn.microsoft.com/en-us/library/system.net.mail.mailaddress.aspx

Your code looks correct. Gmail does not allow you to specify a different 'from address' unless it is one you have proven belongs to you.
Go to Settings > Accounts > 'Send email as' and add an address there. You can only choose to send from any of the accounts you have configured here.

How to send email in richtext format to Outlook?

It works great to send emails (to Outlook) in HTML format by assigning the text/html content type string like so:
using (MailMessage message = new MailMessage())
{
message.From = new MailAddress("--#---.com");
message.ReplyTo = new MailAddress("--#---.com");
message.To.Add(new MailAddress("---#---.com"));
message.Subject = "This subject";
message.Body = "This content is in plain text";
message.IsBodyHtml = false;
string bodyHtml = "<p>This is the HTML <strong>content</strong>.</p>";
using (AlternateView altView = AlternateView.CreateAlternateViewFromString(bodyHtml,
new ContentType(MediaTypeNames.Text.Html)))
{
message.AlternateViews.Add(altView);
SmtpClient smtp = new SmtpClient(smtpAddress);
smtp.Send(message);
}
}
The email is correctly recognized as HTML in Outlook (2003).
But if I try rich text:
MediaTypeNames.RichText;
Outlook doesn't detect this, it falls back to plain text.
How do I send email in rich text format?

The bottom line is, you can't do this easily using System.Net.Mail.
The rich text in Outlook is sent as a winmail.dat file in the SMTP world (outside of Exchange).
The winmail.dat file is a TNEF message. So, you would need to create your richtext inside of the winmail.dat file (formatted to TNEF rules).
However, that's not all. Outlook uses a special version of compressed RTF, so, you would also need to compress your RTF down, before it's added to the winmail.dat file.
The bottom line, is this is difficult to do, and unless the client really, really needs this functionality, I would rethink it.
This isn't something you can do with a few lines of code in .NET.

You can also achieve this by adding another alternate view before your calendar view as below:
var body = AlternateView.CreateAlternateViewFromString(bodyHtml, new System.Net.Mime.ContentType("text/html"));
mailMessage.AlternateViews.Add(body);

This worked for me..
public void sendUsersMail(string recipientMailId, string ccMailList, string body, string subject)
{
try
{
MailMessage Msg = new MailMessage();
Msg.From = new MailAddress("norepl#xyz.com", "Tracker Tool");
Msg.To.Add(recipientMailId);
if (ccMailList != "")
Msg.CC.Add(ccMailList);
Msg.Subject = subject;
var AltBody = AlternateView.CreateAlternateViewFromString(body, new System.Net.Mime.ContentType("text/html"));
Msg.AlternateViews.Add(AltBody);
Msg.IsBodyHtml = true;
SmtpClient smtp = new SmtpClient("mail.xyz.com");
smtp.Send(Msg);
smtp.Dispose();
}
catch (Exception ex)
{
}
}