相关疑难解决方法(0)

假设我有一个StartDate和一个EndDate,我想检查EndDate是否距离开始日期不超过3个月

public class DateCompare : ValidationAttribute 
 {
    public String StartDate { get; set; }
    public String EndDate { get; set; }

    //Constructor to take in the property names that are supposed to be checked
    public DateCompare(String startDate, String endDate)
    {
        StartDate = startDate;
        EndDate = endDate;
    }

    public override bool IsValid(object value)
    {
        var str = value.ToString();
        if (string.IsNullOrEmpty(str))
            return true;

        DateTime theEndDate = DateTime.ParseExact(EndDate, "yyyy-MM-dd HH:mm:ss", CultureInfo.InvariantCulture);
        DateTime theStartDate = DateTime.ParseExact(StartDate, "yyyy-MM-dd HH:mm:ss", CultureInfo.InvariantCulture).AddMonths(3);
        return (DateTime.Compare(theStartDate, theEndDate) > 0); …