我想向 Outlook 以及非 Outlook 客户端(例如 gmail/yahoo)发送一封包含日历邀请/约会的电子邮件。我的应用程序托管在 Azure 上,我使用 SendGrid 发送电子邮件。电子邮件部分工作得很好,但我还没有找到任何可以与 Outlook 和其他电子邮件客户端一起使用的完整工作解决方案。这是我用来发送电子邮件的代码片段:
var client = new SendGridClient(this.apiKey);
var msg = MailHelper.CreateSingleEmailToMultipleRecipients(
new EmailAddress(Sender, SenderName),
recipients, subject, textcontent, htmlcontent);
if (isMeetingRequest)
{
Attachment attachment = new Attachment();
attachment.Filename = "calendar.ics";
attachment.Content = htmlcontent;
attachment.Type = "text/calendar";
msg.Attachments = new List<Attachment> { attachment };
}
await client.SendEmailAsync(msg);
htmlContent 来自形成日历邀请字符串的另一个编码片段:
private static string MeetingRequestString(string from, List<string> toUsers, string subject, string desc, DateTime startTime, DateTime endTime)
{
StringBuilder str = new StringBuilder();
str.AppendLine("BEGIN:VCALENDAR");
str.AppendLine("PRODID:-//Microsoft Corporation//Outlook 12.0 MIMEDIR//EN");
str.AppendLine("VERSION:2.0");
str.AppendLine(string.Format("METHOD:REQUEST"));
str.AppendLine("BEGIN:VEVENT");
str.AppendLine(string.Format("DTSTART:{0:yyyyMMddTHHmmssZ}", startTime));
str.AppendLine(string.Format("DTSTAMP:{0:yyyyMMddTHHmmss}", DateTime.Now));
str.AppendLine(string.Format("DTEND:{0:yyyyMMddTHHmmssZ}", endTime));
str.AppendLine(string.Format("UID:{0}", Guid.NewGuid().ToString()));
str.AppendLine(string.Format("DESCRIPTION:{0}", desc.Replace("\n", "<br>")));
str.AppendLine(string.Format("X-ALT-DESC;FMTTYPE=text/html:{0}", desc.Replace("\n", "<br>")));
str.AppendLine(string.Format("SUMMARY:{0}", subject));
str.AppendLine(string.Format("ORGANIZER;CN=\"{0}\":MAILTO:{1}", from, from));
str.AppendLine(string.Format("ATTENDEE;CN=\"{0}\";RSVP=TRUE:mailto:{1}", string.Join(",", toUsers), string.Join(",", toUsers)));
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");
return str.ToString();
}
这似乎不起作用。有什么指点吗?
最佳答案
根据您的描述,我检查了此问题并尝试发送带有日历附件的电子邮件。您可以引用以下代码片段:
static async Task SendGridAsync()
{
var client = new SendGridClient("your-api-key");
var msg = new SendGridMessage()
{
From = new EmailAddress("{sender-email}", "{sender-name}"),
Subject = "Hello World from the SendGrid CSharp SDK!",
HtmlContent = "<strong>Hello, Email using HTML!</strong>"
};
var recipients = new List<EmailAddress>
{
new EmailAddress("{recipient-email}", "{recipient-name}")
};
msg.AddTos(recipients);
string CalendarContent = MeetingRequestString("{ORGANIZER}", new List<string>() { "{ATTENDEE}" },"{subject}","{description}", "{location}", DateTime.Now, DateTime.Now.AddDays(2));
byte[] calendarBytes = Encoding.UTF8.GetBytes(CalendarContent.ToString());
SendGrid.Helpers.Mail.Attachment calendarAttachment = new SendGrid.Helpers.Mail.Attachment();
calendarAttachment.Filename = "invite.ics";
//the Base64 encoded content of the attachment.
calendarAttachment.Content = Convert.ToBase64String(calendarBytes);
calendarAttachment.Type = "text/calendar";
msg.Attachments = new List<SendGrid.Helpers.Mail.Attachment>() { calendarAttachment };
var response = await client.SendEmailAsync(msg);
}
private static string MeetingRequestString(string from, List<string> toUsers, string subject, string desc, string location, DateTime startTime, DateTime endTime, int? eventID = null, bool isCancel = false)
{
StringBuilder str = new StringBuilder();
str.AppendLine("BEGIN:VCALENDAR");
str.AppendLine("PRODID:-//Microsoft Corporation//Outlook 12.0 MIMEDIR//EN");
str.AppendLine("VERSION:2.0");
str.AppendLine(string.Format("METHOD:{0}", (isCancel ? "CANCEL" : "REQUEST")));
str.AppendLine("BEGIN:VEVENT");
str.AppendLine(string.Format("DTSTART:{0:yyyyMMddTHHmmssZ}", startTime.ToUniversalTime()));
str.AppendLine(string.Format("DTSTAMP:{0:yyyyMMddTHHmmss}", DateTime.Now));
str.AppendLine(string.Format("DTEND:{0:yyyyMMddTHHmmssZ}", endTime.ToUniversalTime()));
str.AppendLine(string.Format("LOCATION: {0}", location));
str.AppendLine(string.Format("UID:{0}", (eventID.HasValue ? "blablabla" + eventID : Guid.NewGuid().ToString())));
str.AppendLine(string.Format("DESCRIPTION:{0}", desc.Replace("\n", "<br>")));
str.AppendLine(string.Format("X-ALT-DESC;FMTTYPE=text/html:{0}", desc.Replace("\n", "<br>")));
str.AppendLine(string.Format("SUMMARY:{0}", subject));
str.AppendLine(string.Format("ORGANIZER;CN=\"{0}\":MAILTO:{1}", from, from));
str.AppendLine(string.Format("ATTENDEE;CN=\"{0}\";RSVP=TRUE:mailto:{1}", string.Join(",", toUsers), string.Join(",", toUsers)));
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");
return str.ToString();
}
结果:
关于c# - 在 SendGrid C# 中将电子邮件作为日历邀请/约会发送,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/45076896/