日期时间选择器验证

Question

我有两个datetimepickers（DateofBirth（DOB）和DateofIssue（DOI）），我需要验证这些日期时间选择器，DateofBirth（DOB）和DateOfIssue（DOI）之间应该有18年的差异。这该怎么做。请建议我的想法

Answer 1

DateTime birth;
DateTime issue;
if (birth.AddYears(18) > issue) {
    throw new Exception("Not 18 years between birth and issue");
}

Answer 2

System.DateTime date1 = new System.DateTime(1996, 6, 3, 22, 15, 0);
System.DateTime date2 = new System.DateTime(1996, 12, 6, 13, 2, 0);

// diff1 gets 185 days, 14 hours, and 47 minutes.
int diff1 = date2.Subtract(date1).TotalYears;

Answer 3

使用 DateDiff 功能

http://msdn.microsoft.com/en-us/library/b5xbyt6f(v=vs.71).aspx