即使指定UTC时间,会议提醒(.ICS)电子邮件附件也不会考虑时区
问题描述:
我们有一个C#控制台应用程序,它会为本地事件发送注册确认电子邮件。 我只是添加了逻辑来附加.ICS日历约会提醒到电子邮件,指定UTC时间。即使指定UTC时间,会议提醒(.ICS)电子邮件附件也不会考虑时区
当用户收到电子邮件并将约会添加到他/她的日历中时,它应该适应当地PC的环境时间,但不会这样做。例如,在我的测试中,该活动是在圣地亚哥的上午11:30 - 下午1:00。 当我(在*时区)打开电子邮件附件并添加到日历时,它应该在下午1点30分到下午3点结束,但仍在11:30 - 1:00 PM之间。
我见过http://erics-notes.blogspot.com/2013/05/fixing-ics-time-zone.html建议添加VTIMEZONE块和时区参考DTSTART & DTEND(如“DTSTART; TZID =美洲/洛杉矶:20130602T130000”) 但在例如他不使用UTC时间。
The.ICS附件文件包含此;抱歉额外的换行符,但是当它们不在时,它会一起运行。指定 注意DTSTART & DTEND“Z”通用时代:
BEGIN:VCALENDAR
PRODID:-//Save to my Calendar
VERSION:2.0
METHOD:PUBLISH
BEGIN:VEVENT
DTSTART:20170622T163000Z
DTEND:20170622T180000Z
DTSTAMP:20170718T134127Z
UID:6f59cf3b-99b5-4935-8f7c-3cb4c2e7a53f
CREATED:20170718T134127Z
LAST-MODIFIED:20170718T134127Z
X-ALT-DESC;FMTTYPE=text/html:<a href="http://mycompany.net/Events/12345">Party<a>
DESCRIPTION:mycompany.net/Events/12345
LOCATION:Restaurant name, 123 Elm, San Diego CA
SEQUENCE:0
STATUS:CONFIRMED
SUMMARY:My company’s event
END:VEVENT
END:VCALENDAR
我明白任何建议...谢谢!
我的代码...很不起眼,但请注意,我将开始&结束时间UTC:
private static Attachment CreateEventCalendarReminder(DataRow dr)
{
var sb = new StringBuilder();
string nowUTCString = DateTime.Now.ToUniversalTime().ToString("yyyyMMddTHHmmssZ");
sb.AppendLine("BEGIN:VCALENDAR");
sb.AppendLine("PRODID:-//Save to my Calendar");
sb.AppendLine("VERSION:2.0");
sb.AppendLine("METHOD:PUBLISH");
//sb.AppendLine("TZ:+00");
sb.AppendLine("BEGIN:VEVENT");
sb.AppendLine("DTSTART:" + DateTime.Parse(dr["StartDate"].ToString()).ToUniversalTime().ToString("yyyyMMddTHHmmssZ"));
sb.AppendLine("DTEND:" + DateTime.Parse(dr["EndDate"].ToString()).ToUniversalTime().ToString("yyyyMMddTHHmmssZ"));
sb.AppendLine("DTSTAMP:" + nowUTCString);
sb.AppendLine("UID:" + Guid.NewGuid());
sb.AppendLine("CREATED:" + nowUTCString);
sb.AppendLine("LAST-MODIFIED:" + nowUTCString);
sb.AppendLine("X-ALT-DESC;FMTTYPE=text/html:"
+ "Thank you for registering for our event. Click "
+ (string)dr["EventDescHyperlink"]
+ " DetermineWhichEmailsToSend view the event details. We look forward to seeing you Attachment the EventArgs and appreciate your support.");
sb.AppendLine("DESCRIPTION:" + (string)dr["EventDescURL"]);
sb.AppendLine("LOCATION:" + (string)dr["VenueCombinedInfo"]);
sb.AppendLine("SEQUENCE:0");
sb.AppendLine("STATUS:CONFIRMED");
sb.AppendLine("SUMMARY:" + "My Company" + (string)dr["OfficeName"] + " Event");
sb.AppendLine("END:VEVENT");
sb.AppendLine("END:VCALENDAR");
var calendarBytes = Encoding.UTF8.GetBytes(sb.ToString());
MemoryStream ms = new MemoryStream(calendarBytes);
return new System.Net.Mail.Attachment(ms, "EventReminder.ics", "text/calendar");
}
答
你需要,你将使用UTC时间VEVENT之前在指定:
TZ:+00
BEGIN:VEVENT