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我想Except在两个列表之间申请。一个列表是MailAddress格式,另一个是String(转换为列表))?

         List<MailAddress> toemails = new List<MailAddress>();
            //List<String> emailsFrom = address.Split(';').ToList();
            List<string> temp1 = new List<string>();
            List<MailAddress> temp2 = new List<MailAddress>();
            List<MailAddress> temp3 = new List<MailAddress>();

      //message.to gives me a list of messages (outgoing)
            foreach (var e in message.To)
            {
                temp2.Add(e);
            }

           //result contains a list of emails fetched (count=7)
            var result = from lst in ListofEmails where lst.ToLower().Length < 50 select lst;
            temp1 = result.ToList();

            //(Not able to understand this, how to proceed)

            // toemails = temp2.Except(temp1.);
            // MailMessage msg = new MailMessage();

的输出结果Except应该是MailAddress对象列表。

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1 回答 1

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无需使用 except,只需使用基本的 LINQ:

由于 temp1 包含电子邮件地址...

toemails = temp2.Where(email =>
          !temp1.Any(e => e.Equals(email.Address, StringComparison.OrdinalIgnoreCase))).ToList();
于 2019-06-06T09:04:00.030 回答