使用C＃创建ics文件并发送带有附件的电子邮件

Question

我需要发送带有ics文件的日历约会电子邮件，附件中包含约会详细信息，我收到邮件，但是缺少附件帮助我，有人可以解决此问题

需要创建简单的ics文件，并将其与电子邮件一起附加。

我尝试时请看下面的代码

   public IHttpActionResult cal(calendar objApptEmail)
    {
        MailMessage msg = new MailMessage();
        //Now we have to set the value to Mail message properties

        //Note Please change it to correct mail-id to use this in your application
        msg.From = new MailAddress("ssss@gmail.com", "ABC");
        msg.To.Add(new MailAddress("ssss@outlook.com", "BCD"));
        //  msg.CC.Add(new MailAddress("zzzzz@xyz.com", "DEF"));// it is optional, only if required
        //   msg.Headers.Add("Content-class", "urn:content-classes:calendarmessage");
        msg.Subject = "Send mail with ICS file as an Attachment";
        msg.Body = "Please Attend the meeting with this schedule";

        // Now Contruct the ICS file using string builder
        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(+330)));
        str.AppendLine(string.Format("DTSTAMP:{0:yyyyMMddTHHmmssZ}", DateTime.UtcNow));
        str.AppendLine(string.Format("DTEND:{0:yyyyMMddTHHmmssZ}", DateTime.Now.AddMinutes(+660)));
        str.AppendLine("LOCATION: " + objApptEmail.Location);
        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);

        //Now sending a mail with attachment ICS file.                     
        System.Net.Mail.SmtpClient smtpclient = new System.Net.Mail.SmtpClient();
        smtpclient.Host = "smtp.gmail.com"; //-------this has to given the Mailserver IP
        smtpclient.EnableSsl = true;
        smtpclient.Credentials = new System.Net.NetworkCredential("dddd@gmail.com", "xxxxx");
        smtpclient.Send(msg);
        return Ok();       

}

Answer 1

我曾经有过同样的要求，并且与 Ical.Net 程序集配合得很好。

使用此库，您无需手动解析所有内容，但可以使用“正常编程”:)

using Ical.Net;
using Ical.Net.DataTypes;
using Ical.Net.Serialization.iCalendar.Serializers;

private static Calendar CreateCalendarEntry(DateTime? start, DateTime? end, string title, string description, string location)
{
    Calendar iCal = new Calendar();
    iCal.Method = "PUBLISH";
    // Create the event, and add it to the iCalendar
    Event evt = iCal.Create<Event>();
    // Set information about the event
    evt.Start = new CalDateTime(start.Value);
    evt.End = new CalDateTime(end.Value); // This also sets the duration  
    evt.Description = description;
    evt.Location = location;
    evt.Summary = title;
    // Create a reminder 24h before the event
    Alarm reminder = new Alarm();
    reminder.Action = AlarmAction.Display;
    reminder.Trigger = new Trigger(new TimeSpan(-24, 0, 0));
    evt.Alarms.Add(reminder);

    return iCal;
}

您可以在此处下载程序集

创建 之后Calendar，您可以轻松地通过流通过邮件发送它。

Answer 2

我删除了所有代码，并在我的机器上对其进行测试后输入了代码。就我而言，这很好。您的情况不起作用，请尝试在Gmail中设置“安全性较低”的应用程序（我看到您正在使用gmail发送电子邮件）

System.Net.Mail.MailMessage msg = new MailMessage("anirudhagupta01@example.com","anirudha@testing.com");

            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(+330)));
            str.AppendLine(string.Format("DTSTAMP:{0:yyyyMMddTHHmmssZ}", DateTime.UtcNow));
            str.AppendLine(string.Format("DTEND:{0:yyyyMMddTHHmmssZ}", DateTime.Now.AddMinutes(+660)));
            str.AppendLine("LOCATION: " + "abcd");
            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");

            byte[] byteArray = Encoding.ASCII.GetBytes(str.ToString());
            MemoryStream stream = new MemoryStream(byteArray);

            Attachment attach = new Attachment(stream,"test.ics");

            msg.Attachments.Add(attach);

            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);

            //Now sending a mail with attachment ICS file.                     
            System.Net.Mail.SmtpClient smtpclient = new System.Net.Mail.SmtpClient();
            smtpclient.Host = "smtp.gmail.com"; //-------this has to given the Mailserver IP
            smtpclient.EnableSsl = true;
            smtpclient.Credentials = new System.Net.NetworkCredential("anirudhagupta0011@gmail.com", "testing");
            smtpclient.Send(msg);