Send Meeting By SMTP

Posted 2020-10-28 zrynet

4 用SMTP　发送会议邀请

 

public ServiceWrapper SendInvitation(MMeetingInvitation model)
        {
            Log.WriteMsg($" OldModel:{new javascriptSerializer().Serialize(model)}");
            var sw = new ServiceWrapper("SendMeetingInvitation");
            InvitationMail im = new InvitationMail();
            try
            {
                if (!string.IsNullOrEmpty(model.content))
                    model.content = model.content.Replace("\\n", "\n");
                if (!string.IsNullOrEmpty(model.attendees))
                    model.attendees = model.attendees.Replace(",", ";");

                string attendees;

                attendees = string.Join(";", (model.organizer + ";" + model.attendees).Split(‘;‘).Where(s => { return s.TrimEnd().TrimStart().Contains("@"); }).Distinct().ToArray());

                if (string.IsNullOrEmpty(model.NoticeType))
                {
                    model.NoticeType = "invite";
                }
                if (String.IsNullOrEmpty(model.MeetingGuid))
                {
                    model.MeetingGuid = Guid.NewGuid().ToString();
                }
                im.Subject = model.subject;
                im.Content = model.content;
                im.StartTime = model.beginTime;
                im.EndTime = model.endTime;
                im.GUID = model.MeetingGuid;
                im.Location = model.location;
                im.MailRequiredAttendees = attendees;
                im.MailFrom = model.CreatedBy;
                im.Organizer = model.organizer;
                im.NoticeType = model.NoticeType;
                im.EmailTimeZone = model.TimeZone;

                MailMessage ms = im.GetMailMessageWithType();

                sw = SendEmail(ms);
                sw.Data = model.MeetingGuid.ToString();
                Log.WriteMsg($"Successful Model:{new JavaScriptSerializer().Serialize(im)}");
            }
            catch (Exception e)
            {
                Log.WriteMsg(" /r/n SendInvitation catch Error   Model Error Message:" + e.HResult + "||||||    Model:" + new JavaScriptSerializer().Serialize(model));

                sw.ReturnCode = -1;
                sw.Message = "Error Message:" + e.Message;
            }
            return sw;

        }

 

 

InvitationMail

public class InvitationMail
{
private MailMessage Message { get; set; }

public string Subject { get; set; }

public string Content { get; set; }

public string MailFrom { get; set; }

public string Organizer { get; set; }

/// <summary>
/// Mail-To split by ";" or ","
/// </summary>
public string MailRequiredAttendees { get; set; }

/// <summary>
/// Mail-CC split by ";" or ","
/// </summary>
public string MailOptionalAttendees { get; set; }

/// <summary>
/// Mail-BCC split by ";" or ","
/// </summary>
public string MailFYI { get; set; }

/// <summary>
/// Time Zone GMT+8
/// </summary>
public DateTime StartTime { get; set; }
/// <summary>
/// Time Zone GMT+8
/// </summary>
public DateTime EndTime { get; set; }
/// <summary>
/// GUID for relation meetings
/// </summary>
public string GUID { get; set; }
public string Location { get; set; }

// add by joey 2015 -10-10 RESCHEDULE Cancel, INVITE,CONFIRM
public string NoticeType { get; set; }

public double EmailTimeZone { get; set; }

public void AddAttachment(Attachment a)
{
Message.Attachments.Add(a);
}

public void RemoveAttachment(Attachment a)
{
Message.Attachments.Remove(a);
}

/// <summary>
/// Init MailMessage object, init appcode organization etc.
/// </summary>
public InvitationMail()
{
Message = new MailMessage();

string appCodeToSkipDisclaimer = "PCD";
string appCodeToSkipDisclaimerTagName = "Request-To-Skip-Disclaimer";
System.Collections.Generic.List<string> appCodeToSkipDisclaimerArray;

string[] disclaimerArray = appCodeToSkipDisclaimer.ToLower().Split(new char[] { ‘;‘ });
appCodeToSkipDisclaimerArray = new System.Collections.Generic.List<string>(disclaimerArray);

//Header
string headerValue = "PWCHK-0000000000-PWCHK";
string appcode = "MyRiskMonitor20";
if (appCodeToSkipDisclaimerArray.Count > 0 && appCodeToSkipDisclaimerArray.Contains(appcode))
Message.Headers.Add(appCodeToSkipDisclaimerTagName, headerValue);

Message.Headers.Add("Organization", "PricewaterhouseCoopers");
}
/// <summary>
/// Get generated MailMessage object
/// </summary>
/// <returns></returns>
public MailMessage GetMailMessage()
{
//Subject
Message.Subject = Subject;
Message.SubjectEncoding = System.Text.Encoding.UTF8; // Add by Sam Wang 2011-06-27, resolve subject display in iPhone. Version: 1.0.1.110627.0
Message.Body = Content;
Message.BodyEncoding = System.Text.Encoding.UTF8;

//Format html or Text
if (Content != null && Content.ToLower().IndexOf("<html>") >= 0)
Message.IsBodyHtml = true;
else
Message.IsBodyHtml = false;

Message.From = EmailAddressFormatterWithString(MailFrom);
EmailAddressFormatter(Message.To, MailRequiredAttendees);
if (MailOptionalAttendees != null)
EmailAddressFormatter(Message.CC, MailOptionalAttendees);
if (MailFYI != null)
EmailAddressFormatter(Message.Bcc, MailFYI);

string meetingInfo;

InvitationBuilder m = new InvitationBuilder(
StartTime,
EndTime,
MailRequiredAttendees.Split(‘;‘),
(MailOptionalAttendees != null) ? MailOptionalAttendees.Split(‘;‘) : null,
EmailAddressFormatterWithString(MailFrom).ToString(),
Subject,
Content,
GUID,
Location);

meetingInfo = m.ToString();

#if DEBUG
Console.WriteLine("----------------Building ics file---------------------");
Console.WriteLine(meetingInfo);
#endif

//create AlternateView
AlternateView icsView = AlternateView.CreateAlternateViewFromString(
meetingInfo,
new System.Net.Mime.ContentType("text/calendar; method=REQUEST")
);

Message.AlternateViews.Add(icsView);

return Message;
}

/// <summary>
/// add by joey 2015-10-10
/// </summary>
/// <returns></returns>
public MailMessage GetMailMessageWithType()
{
//Subject
Message.Subject = Subject;
Message.SubjectEncoding = System.Text.Encoding.UTF8;

Message.Body = Content;
Message.IsBodyHtml = true;
Message.BodyEncoding = System.Text.Encoding.UTF8;

Message.From = EmailAddressFormatterWithString(MailFrom);
EmailAddressFormatter(Message.To, MailRequiredAttendees);
if (MailOptionalAttendees != null)
EmailAddressFormatter(Message.CC, MailOptionalAttendees);
if (MailFYI != null)
EmailAddressFormatter(Message.Bcc, MailFYI);

string meetingInfo;

InvitationBuilder m = new InvitationBuilder(
StartTime,
EndTime,
MailRequiredAttendees.Split(‘;‘),
(MailOptionalAttendees != null) ? MailOptionalAttendees.Split(‘;‘) : null,
Message.From.ToString(),
Subject,
Content,
GUID,
Location,
NoticeType,
EmailTimeZone
);
meetingInfo = m.ToStringWithType();

 

System.Net.Mime.ContentType contypehtml = new System.Net.Mime.ContentType("text/html");
contypehtml.Parameters.Add("charset", "UTF-8");
System.Net.Mail.AlternateView avCalhtml = System.Net.Mail.AlternateView.CreateAlternateViewFromString(Content, contypehtml);

Message.AlternateViews.Add(avCalhtml);

System.Net.Mime.ContentType calendarType = new System.Net.Mime.ContentType("text/calendar");
calendarType.Parameters.Add("method", "REQUEST");
calendarType.Parameters.Add("name", "meeting.ics");

AlternateView icsView = AlternateView.CreateAlternateViewFromString(meetingInfo, calendarType);
Message.AlternateViews.Add(icsView);
return Message;
}

/// <summary>
/// return MailAddressCollection type of object to add to related field
/// </summary>
/// <param name="emailAddr"></param>
/// <returns></returns>
private MailAddress EmailAddressFormatterWithString(string emailAddr)
{
emailAddr = emailAddr.Replace(" ", "_");
string[] arr_email = emailAddr.Split(";,".ToCharArray());

for (int i = 0; i < arr_email.Length; i++)
{

if (arr_email[i].IndexOf("@") < 0)
return new MailAddress(arr_email[i] + "@Asia");
else
return new MailAddress(arr_email[i]);
}
return null;
}

/// <summary>
/// new method to return MailAddressCollection type of object to add to related field
/// </summary>
/// <param name="emailAddr"></param>
/// <returns></returns>
private void EmailAddressFormatter(MailAddressCollection target, string emailAddr)
{
emailAddr = emailAddr.Replace(" ", "_");
string[] arr_email = emailAddr.Split(";,".ToCharArray());

for (int i = 0; i < arr_email.Length; i++)
{

if (arr_email[i].IndexOf("@") < 0)
target.Add(new MailAddress(arr_email[i] + "@Asia"));
else
target.Add(new MailAddress(arr_email[i]));

}
}
}

InvitationBuilder

 public class InvitationBuilder
    {
        /// <summary>
        /// Current Time Zone
        /// </summary>
        public DateTime StartTime { get; set; }
        /// <summary>
        /// Current Time Zone
        /// </summary>
        public DateTime EndTime { get; set; }
        public string[] Attendees { get; set; }
        public string[] OptionalAttendees { get; set; }

        public string Organizer { get; set; }

        public string Subject { get; set; }
        public string Description { get; set; }

        /// <summary>
        /// GUID for relation meetings
        /// </summary>
        public string Guid { get; set; }
        public string Location { get; set; }
        // add by joey 2015 -10-10 RESCHEDULE Cancel, INVITE,CONFIRM
        public string NoticeType { get; set; }
        public double EmailTimezone { get; set; }
        public string TZID { get; set; }
        /// <summary>
        /// Disabled default structrue method
        /// </summary>
        private InvitationBuilder() { }

        /// <summary>
        /// Structure of Invitation
        /// </summary>
        /// <param name="startTime">Current Time Zone</param>
        /// <param name="endTime">Current Time Zone</param>
        /// <param name="attendees"></param>
        /// <param name="organizer"></param>
        /// <param name="subject"></param>
        /// <param name="description"></param>
        /// <param name="guid">GUID for relation meetings</param>
        /// <param name="location"></param>
        public InvitationBuilder(DateTime startTime, DateTime endTime, string[] attendees, string organizer,
            string subject, string description, string guid, string location)
        {
            StartTime = startTime;
            EndTime = endTime;
            Attendees = attendees;
            Organizer = organizer;
            Subject = subject;
            Description = description;
            Guid = guid;
            Location = location;
        }



        /// <summary>
        /// Structure of Invitation With OptionalAtendees
        /// </summary>
        /// <param name="startTime">Current Time Zone</param>
        /// <param name="endTime">Current Time Zone</param>
        /// <param name="attendees"></param>
        /// <param name="organizer"></param>
        /// <param name="subject"></param>
        /// <param name="description"></param>
        /// <param name="guid">GUID for relation meetings</param>
        /// <param name="location"></param>
        public InvitationBuilder(DateTime startTime, DateTime endTime, string[] attendees, string[] optionalAttendees, string organizer,
            string subject, string description, string guid, string location)
        {
            StartTime = startTime;
            EndTime = endTime;
            Attendees = attendees;
            Organizer = organizer;
            OptionalAttendees = optionalAttendees;
            Subject = subject;
            Description = description;
            Guid = guid;
            Location = location;
        }



        /// <summary>
        /// Structure of Invitation With OptionalAtendees and with Noticetype
        /// </summary>
        /// <param name="startTime">Current Time Zone</param>
        /// <param name="endTime">Current Time Zone</param>
        /// <param name="attendees"></param>
        /// <param name="organizer"></param>
        /// <param name="subject"></param>
        /// <param name="description"></param>
        /// <param name="guid">GUID for relation meetings</param>
        /// <param name="location"></param>
        public InvitationBuilder(DateTime startTime, DateTime endTime, string[] attendees, string[] optionalAttendees, string organizer,
            string subject, string description, string guid, string location, string noticeType,double emailtimezone)
        {
            StartTime = startTime;
            EndTime = endTime;
            Attendees = attendees;
            Organizer = organizer;
            OptionalAttendees = optionalAttendees;
            Subject = subject;
            Description = description;
            Guid = guid;
            Location = location;
            NoticeType = noticeType;
            EmailTimezone = emailtimezone;
        }


        public virtual bool SaveToFile(string path)
        {
            try
            {
                FileStream fs = new FileStream(path, FileMode.Create);

                byte[] data = System.Text.Encoding.Default.GetBytes(ToString());

                fs.Write(data, 0, data.Length);

                fs.Flush();
                fs.Close();
                return true;
            }
            catch
            {
                return false;
            }
        }


        private string GenerateCalendarICS(
            string calendarid,
            DateTime starttime,
            DateTime endtime,
            string location,
            MailAddressCollection mto,
            MailAddressCollection mcc,
            string subject,
            string content,
            string mfrom,
            int sequence,
            string noticeType)
        {
            StringBuilder sw = new StringBuilder();
            sw.AppendLine("BEGIN:VCALENDAR");
            sw.AppendLine("VERSION:2.0");
            if (noticeType.ToUpper() != "CANCEL")
            {
                sw.AppendLine("METHOD:REQUEST");
            }
            else
            {
                sw.AppendLine("METHOD:CANCEL");
            }

            //time zone GMT+8
            sw.AppendLine("BEGIN:VTIMEZONE");
            sw.AppendLine("TZID:China");
            sw.AppendLine("BEGIN:STANDARD");
            sw.AppendLine("DTSTART:19500101T020000");
            sw.AppendLine("TZOFFSETFROM:+0800");
            sw.AppendLine("TZOFFSETTO:+0800");
            sw.AppendLine("END:STANDARD");
            sw.AppendLine("END:VTIMEZONE");
            //end time zone

            sw.AppendLine("BEGIN:VEVENT");
            //To
            foreach (MailAddress item in mto)
            {
                sw.AppendLine("ATTENDEE;ROLE=REQ-PARTICIPANT;RSVP=TRUE:mailto:" + item.Address.Trim());
            }

            //CC
            foreach (MailAddress item in mcc)
            {
                sw.AppendLine("ATTENDEE;ROLE=OPT-PARTICIPANT;RSVP=TRUE:mailto:" + item.Address.Trim());
            }

            sw.AppendLine("CLASS:PUBLIC");
            sw.AppendLine(string.Format("CREATED:{0:yyyyMMddTHHmmssZ}", DateTime.UtcNow));
            sw.AppendLine("DESCRIPTION:" + content);
            sw.AppendLine(string.Format("DTEND;TZID=\"China\":{0:yyyyMMddTHHmmss}", endtime));//attention: NO "Z" in the end of String
            sw.AppendLine(string.Format("DTSTAMP:{0:yyyyMMddTHHmmssZ}", DateTime.UtcNow));
            sw.AppendLine(string.Format("DTSTART;TZID=\"China\":{0:yyyyMMddTHHmmss}", starttime));//attention: NO "Z" in the end of String
            //sw.AppendLine("ORGANIZER;CN=\"NAME\":mailto:" + mfrom);
            sw.AppendLine("SEQUENCE:" + sequence);
            sw.AppendLine("UID:" + calendarid.ToString());
            sw.AppendLine("LOCATION:" + location);
            sw.AppendLine("SUMMARY;LANGUAGE=en-us:" + subject);
            sw.AppendLine("BEGIN:VALARM");
            sw.AppendLine("TRIGGER:-PT15M");
            sw.AppendLine("ACTION:DISPLAY");
            sw.AppendLine("DESCRIPTION:Reminder");
            sw.AppendLine("END:VALARM");

            sw.AppendLine("X-LOTUS-BROADCAST:FALSE");
            sw.AppendLine("X-LOTUS-UPDATE-SEQ:" + (sequence + 1).ToString());
            sw.AppendLine("X-LOTUS-NOTESVERSION:2");

            switch (noticeType.ToUpper())
            {
                case "RESCHEDULE":
                    sw.AppendLine("X-LOTUS-NOTICETYPE:U");
                    break;

                case "CONFIRM":
                    sw.AppendLine("X-LOTUS-NOTICETYPE:N");
                    sw.AppendLine("X-LOTUS-CONFIRM:TRUE");
                    break;

                case "CANCEL":
                    sw.AppendLine("STATUS:CANCELLED");
                    sw.AppendLine("X-LOTUS-NOTICETYPE:C");
                    break;

                default://include "INVITE" and others
                    sw.AppendLine("X-LOTUS-NOTICETYPE:I");
                    break;
            }

            sw.AppendLine("X-LOTUS-APPTTYPE:3");
            sw.AppendLine("X-LOTUS-CHILD-UID:" + calendarid.ToString());
            //sw.AppendLine("X-LOTUS-UPDATE-WISL:$S:1;$L:1;$B:1;$R:1;$E:1;$W:1;$O:1;$M:1;RequiredAttendees:1;INetRequiredNames:1;AltRequiredNames:1;StorageRequiredNames:1;OptionalAttendees:1;INetOptionalNames:1;AltOptionalNames:1;StorageOptionalNames:1");
            sw.AppendLine("END:VEVENT");
            sw.AppendLine("END:VCALENDAR");

            return sw.ToString();
        }

        /// <summary>
        /// add by joey 2015-10-10
        /// </summary>
        /// <param name="calendarid"></param>
        /// <param name="starttime"></param>
        /// <param name="endtime"></param>
        /// <param name="location"></param>
        /// <param name="mto"></param>
        /// <param name="mcc"></param>
        /// <param name="subject"></param>
        /// <param name="content"></param>
        /// <param name="mfrom"></param>
        /// <param name="sequence"></param>
        /// <param name="noticeType"></param>
        /// <returns></returns>
        public string ToStringWithType()
        {
            StringBuilder sw = new StringBuilder();
            sw.AppendLine("BEGIN:VCALENDAR");
            sw.AppendLine("VERSION:2.0");
            if (NoticeType.ToUpper() != "CANCEL")
            {
                sw.AppendLine("METHOD:REQUEST");
            }
            else
            {
                sw.AppendLine("METHOD:CANCEL");
            }

            //time zone GMT+8
            sw.AppendLine("BEGIN:VTIMEZONE");
            sw.AppendLine("TZID:"+ SendMeetingHelp.TZIDHelp(EmailTimezone));
            sw.AppendLine("BEGIN:STANDARD");
            sw.AppendLine("DTSTART:19500101T020000");

            TZID = SendMeetingHelp.TimeZoneHelp(EmailTimezone);
             sw.AppendLine("TZOFFSETFROM:"+ TZID);// + SendMeetingHelp.TimeZoneHelp(EmailTimezone) );
            sw.AppendLine("TZOFFSETTO:"+ TZID);// + SendMeetingHelp.TimeZoneHelp(EmailTimezone));
           
            sw.AppendLine("END:STANDARD");
            sw.AppendLine("END:VTIMEZONE");
            //end time zone

            sw.AppendLine("BEGIN:VEVENT");
            //To
            if (Attendees != null)
            {
                foreach (string attendee in Attendees)
                {
                    sw.AppendLine("ATTENDEE;ROLE=REQ-PARTICIPANT;RSVP=TRUE:mailto:" + attendee);
                }
            }
            //CC
            if (OptionalAttendees != null)
            {
                foreach (string optAttendee in OptionalAttendees)
                {
                    sw.AppendLine("ATTENDEE;ROLE=OPT-PARTICIPANT;RSVP=TRUE:mailto:" + optAttendee);
                }
            }

            sw.AppendLine("CLASS:PUBLIC");
            sw.AppendLine(string.Format("CREATED:{0:yyyyMMddTHHmmssZ}", DateTime.UtcNow));
            if(!string.IsNullOrEmpty(Description))
            sw.AppendLine("DESCRIPTION:" + Description.Replace("\n","\\n"));
            else
                sw.AppendLine("DESCRIPTION:");

            sw.AppendLine(string.Format("DTEND;TZID=\"{0}\":{1:yyyyMMddTHHmmss}", SendMeetingHelp.TZIDHelp(EmailTimezone), EndTime));//attention: NO "Z" in the end of String
            sw.AppendLine(string.Format("DTSTAMP:{0:yyyyMMddTHHmmssZ}", DateTime.UtcNow));
            sw.AppendLine(string.Format("DTSTART;TZID=\"{0}\":{1:yyyyMMddTHHmmss}",SendMeetingHelp.TZIDHelp(EmailTimezone), StartTime));//attention: NO "Z" in the end of String
            //sw.AppendLine("ORGANIZER;CN=\"NAME\":mailto:" + mfrom);
            sw.AppendLine("SEQUENCE:0");
            sw.AppendLine("UID:" + Guid);
            sw.AppendLine("LOCATION:" + Location);
            sw.AppendLine("SUMMARY;LANGUAGE=en-us:" + Subject);
            sw.AppendLine("BEGIN:VALARM");
            sw.AppendLine("TRIGGER:-PT15M");
            sw.AppendLine("ACTION:DISPLAY");
            sw.AppendLine("DESCRIPTION:Reminder");
            sw.AppendLine("END:VALARM");

            sw.AppendLine("X-LOTUS-BROADCAST:FALSE");
            //sw.AppendLine("X-LOTUS-UPDATE-SEQ:" + (2).ToString());
            sw.AppendLine("X-LOTUS-NOTESVERSION:2");

            switch (NoticeType.ToUpper())
            {
                case "RESCHEDULE":
                    sw.AppendLine("X-LOTUS-NOTICETYPE:U");
                    break;

                case "CONFIRM":
                    sw.AppendLine("X-LOTUS-NOTICETYPE:N");
                    sw.AppendLine("X-LOTUS-CONFIRM:TRUE");
                    break;

                case "CANCEL":
                    sw.AppendLine("STATUS:CANCELLED");
                    sw.AppendLine("X-LOTUS-NOTICETYPE:C");
                    break;

                case "UPDATE":
                    sw.AppendLine("X-LOTUS-NOTICETYPE:E");
                       break;
                default://include "INVITE" and others
                    sw.AppendLine("X-LOTUS-NOTICETYPE:I");
                    break;
            }

            sw.AppendLine("X-LOTUS-APPTTYPE:3");
            sw.AppendLine("X-LOTUS-CHILD-UID:" + Guid.ToString());
            //sw.AppendLine("X-LOTUS-UPDATE-WISL:$S:1;$L:1;$B:1;$R:1;$E:1;$W:1;$O:1;$M:1;RequiredAttendees:1;INetRequiredNames:1;AltRequiredNames:1;StorageRequiredNames:1;OptionalAttendees:1;INetOptionalNames:1;AltOptionalNames:1;StorageOptionalNames:1");
            sw.AppendLine("END:VEVENT");
            sw.AppendLine("END:VCALENDAR");

            return sw.ToString();
        }

        public override string ToString()
        {
            StringBuilder sw = new StringBuilder();
            sw.AppendLine("BEGIN:VCALENDAR");
            sw.AppendLine("VERSION:2.0");
            //sw.AppendLine("METHOD:CANCEL");
            sw.AppendLine("METHOD:REQUEST");
            //time zone GMT+8
            sw.AppendLine("BEGIN:VTIMEZONE");
            sw.AppendLine("TZID:China");
            sw.AppendLine("BEGIN:STANDARD");
            sw.AppendLine("DTSTART:19500101T020000");
            sw.AppendLine("TZOFFSETFROM:+0800");
            sw.AppendLine("TZOFFSETTO:+0800");
            sw.AppendLine("END:STANDARD");
            sw.AppendLine("END:VTIMEZONE");
            //end time zone

            sw.AppendLine("BEGIN:VEVENT");
            //To
            if (Attendees != null)
            {
                foreach (string attendee in Attendees)
                {
                    sw.AppendLine("ATTENDEE;ROLE=REQ-PARTICIPANT;RSVP=TRUE:mailto:" + attendee);
                }
            }
            //CC
            if (OptionalAttendees != null)
            {
                foreach (string optAttendee in OptionalAttendees)
                {
                    sw.AppendLine("ATTENDEE;ROLE=OPT-PARTICIPANT;RSVP=TRUE:mailto:" + optAttendee);
                }
            }

            sw.AppendLine("CLASS:PUBLIC");
            sw.AppendLine(string.Format("CREATED:{0:yyyyMMddTHHmmssZ}", DateTime.UtcNow));
            sw.AppendLine("DESCRIPTION:" + Description);
            sw.AppendLine(string.Format("DTEND;TZID=\"China\":{0:yyyyMMddTHHmmss}", EndTime));//attention: NO "Z" in the end of String
            sw.AppendLine(string.Format("DTSTAMP:{0:yyyyMMddTHHmmssZ}", DateTime.UtcNow));
            sw.AppendLine(string.Format("DTSTART;TZID=\"China\":{0:yyyyMMddTHHmmss}", StartTime));//attention: NO "Z" in the end of String
            //sw.AppendLine("ORGANIZER;CN=\"NAME\":mailto:" + Organizer);
            sw.AppendLine("SEQUENCE:0");
            sw.AppendLine("UID:" + Guid);
            sw.AppendLine("LOCATION:" + Location);
            sw.AppendLine("SUMMARY;LANGUAGE=en-us:" + Subject);
            sw.AppendLine("BEGIN:VALARM");
            sw.AppendLine("TRIGGER:-PT15M");
            sw.AppendLine("ACTION:DISPLAY");
            sw.AppendLine("DESCRIPTION:Reminder");
            sw.AppendLine("END:VALARM");
            //sw.AppendLine("STATUS:CANCELLED");
            sw.AppendLine("END:VEVENT");
            sw.AppendLine("X-LOTUS-BROADCAST:FALSE");
            sw.AppendLine("X-LOTUS-UPDATE-SEQ:1");
            sw.AppendLine("X-LOTUS-NOTESVERSION:2");
            sw.AppendLine("X-LOTUS-NOTICETYPE:I");
            sw.AppendLine("X-LOTUS-APPTTYPE:3");
            sw.AppendLine("X-LOTUS-CHILD-UID:" + Guid);
            //sw.AppendLine("X-LOTUS-UPDATE-WISL:$S:1;$L:1;$B:1;$R:1;$E:1;$W:1;$O:1;$M:1;RequiredAttendees:1;INetRequiredNames:1;AltRequiredNames:1;StorageRequiredNames:1;OptionalAttendees:1;INetOptionalNames:1;AltOptionalNames:1;StorageOptionalNames:1");
            sw.AppendLine("END:VCALENDAR");

            return sw.ToString();
        }
    }

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