sending ICS files as an attachment using C#

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HI All,

I am trying to send .ics file as an attachment to user by creating ics file and email from C# code it self.I am able to send ICS file saving in to a local drive and attaching to email.

I would like to send ics file with out saving in to any drive.

help me is there any way to send ics file from the C# page itself...

Thanks

Posted 9-Oct-14 20:56pm

Ddev5a2

Updated 25-Apr-23 7:06am

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Comments

Tomas Takac 10-Oct-14 8:24am

Can you post some code?

Ddev5a2 10-Oct-14 9:03am

Here is the code which I used to send direct invite from my gmail to destination.
but now i need to send invitation as an attachment in an email.

Please let me know for more details.
Code Starts:
static void Main(string[] args)
{
Console.WriteLine("Welcome");
var client = new SmtpClient("smtp.gmail.com", 587)
{
Credentials = new NetworkCredential("myemail@gmail.com", "password"),
EnableSsl = true,
Timeout =100000
};
Console.WriteLine("connection success");
// Now Contruct the ICS file using string builder
MailMessage msg = new MailMessage();
msg.From = new MailAddress("fromemail@gmail.com", "Sender's Name");
msg.To.Add(new MailAddress("tomail@gmail.com", "To Name"));
msg.Subject = "Send mail with ICS file as an Attachment";
msg.Body = "Please Attend the meeting with this schedule";
StringBuilder str = new StringBuilder();
str.AppendLine("BEGIN:VCALENDAR");
str.AppendLine("PRODID:-//Schedule a Meeting");
str.AppendLine("VERSION:2.0");
str.AppendLine("METHOD:REQUEST");
str.AppendLine("BEGIN:VEVENT");
str.AppendLine(string.Format("DTSTART:{0:yyyyMMddTHHmmssZ}", DateTime.Now.AddMinutes(+10)));
str.AppendLine(string.Format("DTSTAMP:{0:yyyyMMddTHHmmssZ}", DateTime.UtcNow));
str.AppendLine(string.Format("DTEND:{0:yyyyMMddTHHmmssZ}", DateTime.Now.AddMinutes(+60)));
str.AppendLine("LOCATION: CGI");
str.AppendLine(string.Format("UID:{0}", Guid.NewGuid()));
str.AppendLine(string.Format("DESCRIPTION:{0}", msg.Body));
str.AppendLine(string.Format("X-ALT-DESC;FMTTYPE=text/html:{0}", msg.Body));
str.AppendLine(string.Format("SUMMARY:{0}", msg.Subject));
str.AppendLine(string.Format("ORGANIZER:MAILTO:{0}", msg.From.Address));

str.AppendLine(string.Format("ATTENDEE;CN=\"{0}\";RSVP=TRUE:mailto:{1}", msg.To[0].DisplayName, msg.To[0].Address));

str.AppendLine("BEGIN:VALARM");
str.AppendLine("TRIGGER:-PT15M");
str.AppendLine("ACTION:DISPLAY");
str.AppendLine("DESCRIPTION:Reminder");
str.AppendLine("END:VALARM");
str.AppendLine("END:VEVENT");
str.AppendLine("END:VCALENDAR");

System.Net.Mime.ContentType contype = new System.Net.Mime.ContentType("text/calendar");
contype.Parameters.Add("method", "REQUEST");
contype.Parameters.Add("name", "Meeting.ics");
AlternateView avCal = AlternateView.CreateAlternateViewFromString(str.ToString(), contype);

msg.AlternateViews.Add(avCal);
client.Send(msg);
Console.WriteLine("Sent");
Console.ReadLine();
}

Tomas Takac 13-Oct-14 4:12am

msg.Attachments(new Attachment(str.ToString(), contype));
am I missing something?

Ddev5a2 13-Oct-14 7:04am

Thank you very much..:) I am able to send the attachment with the below.

msg.Attachments.Add(new Attachment(str.ToString(), contype));

2 solutions

Solution 2

Instead of this line: msg.Attachments.Add(new Attachment(str.ToString(), contype));,
which kept giving me an error, I wrote the contents of str to a file via...

string strName = "Aname";
DateTime dt = DateTime.Now.AddHours(1);
string strDate = dt.ToString("yyyyMMddTHHmmss");
...
string strFileName = strName + strDate + ".ics";
...
WriteToFile(sb.ToString());

//msg.Attachments.Add(new Attachment(sb.ToString(), ct));
msg.Attachments.Add(new Attachment(strFileName));

------------
private static void WriteToFile(string strText)
{
using (StreamWriter sw = new StreamWriter(strFileName, true)) // true = append
{
sw.WriteLine(strText);
}
}

Then I attached the newly created file. This worked for me.

Posted 25-Apr-23 7:06am

Member 11633430

Comments

Richard Deeming 26-Apr-23 3:35am

Rather than littering your disk with temporary files that you never clean up, just use Attachment.CreateAttachmentFromString(str.ToString(), contype) to create the attachment from the in-memory data.

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Ddev5a2 · Accepted Answer · 2014-10-14T22:03:00

Solution send Calender Invite as an attachment(.ics file) to end user.

Code Starts:

C#

static void Main(string[] args)
{
    Console.WriteLine("Welcome");
    var client = new SmtpClient("smtp.gmail.com", 587)
    {
        Credentials = new NetworkCredential("myemail@gmail.com", "password"),
        EnableSsl = true,
        Timeout =100000
    };
    Console.WriteLine("connection success");
    // Now Contruct the ICS file using string builder
    MailMessage msg = new MailMessage();
    msg.From = new MailAddress("fromemail@gmail.com", "Sender's Name");
    msg.To.Add(new MailAddress("tomail@gmail.com", "To Name"));
    msg.Subject = "Send mail with ICS file as an Attachment";
    msg.Body = "Please Attend the meeting with this schedule";
    StringBuilder str = new StringBuilder();
    str.AppendLine("BEGIN:VCALENDAR");
    str.AppendLine("PRODID:-//Schedule a Meeting");
    str.AppendLine("VERSION:2.0");
    str.AppendLine("METHOD:REQUEST");
    str.AppendLine("BEGIN:VEVENT");
    str.AppendLine(string.Format("DTSTART:{0:yyyyMMddTHHmmssZ}", DateTime.Now.AddMinutes(+10)));
    str.AppendLine(string.Format("DTSTAMP:{0:yyyyMMddTHHmmssZ}", DateTime.UtcNow));
    str.AppendLine(string.Format("DTEND:{0:yyyyMMddTHHmmssZ}", DateTime.Now.AddMinutes(+60)));
    str.AppendLine("LOCATION: CGI");
    str.AppendLine(string.Format("UID:{0}", Guid.NewGuid()));
    str.AppendLine(string.Format("DESCRIPTION:{0}", msg.Body));
    str.AppendLine(string.Format("X-ALT-DESC;FMTTYPE=text/html:{0}", msg.Body));
    str.AppendLine(string.Format("SUMMARY:{0}", msg.Subject));
    str.AppendLine(string.Format("ORGANIZER:MAILTO:{0}", msg.From.Address));
 
    str.AppendLine(string.Format("ATTENDEE;CN=\"{0}\";RSVP=TRUE:mailto:{1}", msg.To[0].DisplayName, msg.To[0].Address));
 
    str.AppendLine("BEGIN:VALARM");
    str.AppendLine("TRIGGER:-PT15M");
    str.AppendLine("ACTION:DISPLAY");
    str.AppendLine("DESCRIPTION:Reminder");
    str.AppendLine("END:VALARM");
    str.AppendLine("END:VEVENT");
    str.AppendLine("END:VCALENDAR");
 
    System.Net.Mime.ContentType contype = new System.Net.Mime.ContentType("text/calendar");
    contype.Parameters.Add("method", "REQUEST"); 
    contype.Parameters.Add("name", "Meeting.ics");
    
    // EDIT: Use the correct method to create an attachment from in-memory data:
    // msg.Attachments.Add(new Attachment(str.ToString(), contype));
    msg.Attachments.Add(Attachment.CreateAttachmentFromString(str.ToString(), contype));

    client.Send(msg);
    Console.WriteLine("Sent");
    Console.ReadLine();
}