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我有 2 个包含电子邮件地址的列表。我使用列表联合加入他们以获得最终的电子邮件列表，但是有时，任何一个列表都可能是空的。发生的情况是，当列表为空时，它会将其添加到最终列表中作为联合之后的“”，这导致电子邮件 .Send() 在空电子邮件地址上崩溃。如何告诉工会忽略空值？这就是我所拥有的

List<string> _RecordOwnerEmailList = new List<string>();

List<string> _SubmissionEmailList = new List<string>();
List<string> _EmailList = new List<string>();

string _RecordOwnerEmails = String.Empty;
string _SubmissionEmails = String.Empty;

if (dsRecordOwner.Tables[0].Rows.Count > 0 && !String.IsNullOrEmpty(dsRecordOwner.Tables[0].Rows[0]["UpdateEmail"].ToString()))
    _RecordOwnerEmails = dsRecordOwner.Tables[0].Rows[0]["UpdateEmail"].ToString().Replace(" ", "");

if (this.ID > 0)
    _RecordOwnerEmailList = new List<string>(_RecordOwnerEmails.Replace(" ", "").Split(';').ToList());

if (dsEmails.Tables[0].Rows.Count > 0 && !String.IsNullOrEmpty(dsEmails.Tables[0].Rows[0]["Emails"].ToString()))
    _SubmissionEmails = dsEmails.Tables[0].Rows[0]["emails"].ToString().Replace(" ", "");

_SubmissionEmailList = new List<string>(_SubmissionEmails.Replace(" ", "").Split(';').ToList());

_EmailList = _RecordOwnerEmailList.Union(_SubmissionEmailList).ToList();

string[] emails = _EmailList.ToArray();

foreach (string emailAddress in emails)
{ 
    //send email
}
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2 回答 2

3

Where使用子句过滤掉这些空值

_EmailList = _RecordOwnerEmailList
  .Union(_SubmissionEmailList)
  .Where(address => !String.IsNullOrEmpty(address))
  .ToList();
于 2013-03-15T17:30:21.897 回答
0

(_RecordOwnerEmails +";"+_SubmissionEmails).Split(new []{';'},StringSplitOptions.RemoveEmptyEntries).ToList()

于 2013-03-15T17:45:56.647 回答