直接通过SMTP服务发Exchange会议邀请邮件

最新推荐文章于 2021-10-06 14:57:59 发布

转载最新推荐文章于 2021-10-06 14:57:59 发布 · 8.3k 阅读

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本文介绍了一种通过SMTP协议发送Exchange会议邀请的方法。利用.NET Framework中的MailMessage类及AlternateView特性，可以创建包含多种格式（如纯文本、HTML和iCalendar）的邮件内容。这种方式避免了直接使用Outlook对象模型的复杂性。

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Send Exchange meeting by SmtpClient mail

See initiated Conference calls the Outlook API in c # , this way can use SMTP to achieve, my project using the following code:

For the . NET from 2.0 started, e-mail is already a very easy thing. And it has introduced a new AlternateView, use the AlternateView class to specify a different e-mail format. For example, if you are sending HTML -formatted messages, you might also want to provide a message to plain text format, in case some of the recipients use e-mail readers that cannot display HTML content.

Through the use of AlternateView we can achieve Exchange meeting message is sent. The core code is as follows:

MailMessage msg = new MailMessage();

// Set up the different mime types contained in the message

System.Net.Mime. ContentType textType = new System.Net.Mime. ContentType ("text/plain");

System.Net.Mime. ContentType HTMLType = new System.Net.Mime. ContentType ("text/html");

System.Net.Mime. ContentType calendarType = new System.Net.Mime. ContentType ("text/calendar");

// Add parameters to the calendar header

calendarType.Parameters.Add("method", "REQUEST");

calendarType.Parameters.Add("name", "meeting.ics");

// Create message body parts

// create the Body in text format

string bodyText = "Type:Single Meeting"r"nOrganizer: {0}"r"nStart Time:{1}"r"nEnd Time:{2}"r"nTime Zone:{3}"r"nLocation: {4}"r"n"r"n*~*~*~*~*~*~*~*~*~*"r"n"r"n {5}";

bodyText = string. Format(bodyText, organizerName, start. ToLongDateString() + " " + start. ToLongTimeString(), end. ToLongDateString() + " " + end.ToLongTimeString(), System. TimeZone. CurrentTimeZone.StandardName, location, summary);

AlternateView textView = AlternateView. CreateAlternateViewFromString(bodyText, textType);

msg. AlternateViews.Add(textView);

//create the Body in HTML format

string bodyHTML = "<! DOCTYPE HTML PUBLIC ""-//W3C//DTD HTML 3.2//EN"">"r"n<HTML>"r"n<HEAD>"r"n<META HTTP-EQUIV=""Content-Type"" CONTENT=""text/html; charset=utf-8"">"r"n<META NAME=""Generator"" CONTENT=""MS Exchange Server version 6.5.7652.24"">"r"n<TITLE>{0}</TITLE>"r"n</HEAD>"r"n<BODY> "r"n"r"nType:Single Meeting "r"nOrganizer:{1} "r"nStart Time:{2} "r"nEnd Time:{3} "r"nTime Zone:{4} "r"nLocation:{5} "r"n "r"n*~*~*~*~*~*~*~*~*~* "r"n "r"n{6} "r"n"r"n"r"n"r"n</BODY>"r"n</HTML>";

bodyHTML = string. Format(bodyHTML,summary,organizerName,start. ToLongDateString() + " " + start. ToLongTimeString(),end. ToLongDateString() + " " + end.ToLongTimeString(),System. TimeZone. CurrentTimeZone.StandardName,location,summary);

AlternateView HTMLView = AlternateView. CreateAlternateViewFromString(bodyHTML, HTMLType);

msg. AlternateViews.Add(HTMLView);

//create the Body in VCALENDAR format

string calDateFormat = "yyyyMMddTHHmmssZ";

string bodyCalendar = "BEGIN:VCALENDAR"r"nMETHOD:REQUEST"r"nPRODID:Microsoft CDO for Microsoft Exchange"r"nVERSION:2.0"r"nBEGIN:VTIMEZONE"r"nTZID:(GMT-06.00) Central Time (US & Canada)"r"nX-MICROSOFT-CDO-TZID:11"r"nBEGIN:STANDARD"r"nDTSTART:16010101T020000"r"nTZOFFSETFROM:-0500"r"nTZOFFSETTO:-0600"r"nRRULE:FREQ=YEARLY;WKST=MO;INTERVAL=1; BYMONTH=11;BYDAY=1SU"r"nEND:STANDARD"r"nBEGIN:DAYLIGHT"r"nDTSTART:16010101T020000"r"nTZOFFSETFROM:-0600"r"nTZOFFSETTO:-0500"r"nRRULE:FREQ=YEARLY;WKST=MO;INTERVAL=1; BYMONTH=3; BYDAY=2SU"r"nEND:DAYLIGHT"r"nEND:VTIMEZONE"r"nBEGIN:VEVENT"r"nDTSTAMP:{8}"r"nDTSTART:{0}"r"nSUMMARY:{7}"r"nUID:{5}"r"nATTENDEE; ROLE=REQ-PARTICIPANT; PARTSTAT=NEEDS-ACTION; RSVP=TRUE; CN=""{9}"":MAILTO:{9}"r"nACTION; RSVP=TRUE; CN=""{4}"":MAILTO:{4}"r"nORGANIZER; CN=""{3}"":mailto:{4}"r"nLOCATION:{2}"r"nDTEND:{1}"r"nDESCRIPTION:{7}""N"r"nSEQUENCE:1"r"nPRIORITY:5"r"nCLASS:"r"nCREATED:{8}"r"nLAST-MODIFIED:{8}"r"nSTATUS:CONFIRMED "r"nTRANSP:OPAQUE"r"nX-MICROSOFT-CDO-BUSYSTATUS:BUSY"r"nX-MICROSOFT-CDO-INSTTYPE:0"r"nX-MICROSOFT-CDO-INTENDEDSTATUS:BUSY"r"nX-MICROSOFT-CDO-ALLDAYEVENT:FALSE"r" nX-MICROSOFT-CDO-IMPORTANCE:1"r"nX-MICROSOFT-CDO-OWNERAPPTID:-1"r"nX-MICROSOFT-CDO-ATTENDEE-CRITICAL-CHANGE:{8}"r"nX-MICROSOFT-CDO-OWNER-CRITICAL-CHANGE:{8}"r"nBEGIN:VALARM"r"nACTION:DISPLAY"r"nDESCRIPTION:REMINDER"r"nTRIGGER; RELATED=START:-PT00H15M00S"r"nEND:VALARM"r"nEND:VEVENT"r"nEND:VCALENDAR"r"n";

bodyCalendar = string. Format(bodyCalendar,start. ToUniversalTime(). ToString(calDateFormat),end. ToUniversalTime().ToString(calDateFormat),location,organizerName,organizerEmail,Guid. NewGuid(). ToString("B"),summary,subject,DateTime. Now.ToUniversalTime().ToString(calDateFormat),attendeeList.ToString());

AlternateView calendarView = AlternateView. CreateAlternateViewFromString(bodyCalendar, calendarType);

calendarView.TransferEncoding = TransferEncoding. SevenBit;

msg. AlternateViews.Add(calendarView);

// Address the message

msg. From = new MailAddress(organizerEmail);

foreach (MailAddress attendee in attendeeList)

{

msg. To.Add(attendee);

}

msg. Subject = subject;

return msg;

http://rongchaua.net/blog/sharepoint-send-appointment-without-using-outlook-object/