クラス:
public class TimePeriod
{
public DateTime Oldest { get; set; }
public DateTime Newest { get; set; }
public TimePeriod(DateTime oldest, DateTime newest)
{
Oldest = oldest;
Newest = newest;
}
public bool Contains (DateTime time)
{
return Oldest.CompareTo(time) <= 0 && Newest.CompareTo(time) >= 0;
}
public bool IsAfter(DateTime time)
{
return Newest.CompareTo(time) <= 0;
}
public bool IsBefore(DateTime time)
{
return Oldest.CompareTo(time) >= 0;
}
}
テスト:
class Program
{
static void Main(string[] args)
{
var period = new TimePeriod(
DateTime.Now.AddDays(-2),
DateTime.Now.AddDays(1));
var date = DateTime.Now;
var contains = period.Contains(date); // true
var isBefore = period.IsBefore(date); // false
var isAfter = period.IsAfter(date); // false
date = DateTime.Now.AddDays(-10);
contains = period.Contains(date); // false
isBefore = period.IsBefore(date); // true
isAfter = period.IsAfter(date); // false
date = DateTime.Now.AddDays(10);
contains = period.Contains(date); // false
isBefore = period.IsBefore(date); // false
isAfter = period.IsAfter(date); // true
}
}
コレクションと linq を拡張メソッドとラムダ式で使用して、時間ブロックを探すことができるようになりました。