/// <summary>
/// 得到一年中的某周的起始日和截止日
/// 年 nYear
/// 周数 nNumWeek
/// 周始 out dtWeekStart
/// 周终 out dtWeekeEnd
/// </summary>
/// <param name="_"></param>
/// <param name="nYear">年份</param>
/// <param name="nNumWeek">第几周</param>
/// <param name="dtWeekStart">开始日期</param>
/// <param name="dtWeekeEnd">结束日期</param>
public static void GetWeekTime(this DateTime _, int nYear, int nNumWeek, out DateTime dtWeekStart, out DateTime dtWeekeEnd)
{
DateTime dt = new DateTime(nYear, 1, 1);
dt += new TimeSpan((nNumWeek - 1) * 7, 0, 0, 0);
dtWeekStart = dt.AddDays(-(int)dt.DayOfWeek + (int)DayOfWeek.Monday);
dtWeekeEnd = dt.AddDays((int)DayOfWeek.Saturday - (int)dt.DayOfWeek + 1);
}
/// <summary>
/// 指定したセクションの現在時刻に対する残り時間を取得します
/// </summary>
/// <param name="section">セクション(1=午前, 2=午後, 3=月末～月始)</param>
/// <returns>セクション開始前は「待ち○○」、セクション中は「あと○○」、セクション終了後は「確定」※○○はh:mmとなります</returns>
public static string GetTodaysLimitTimeString(int section)
{
DateTime now = DateTime.Now;
DateTime start, limit;
int nowsection = GetSection(now);
if (now.Hour >= 0 && now.Hour < 2)
{
start = new DateTime(now.Year, now.Month, now.Day).AddDays(-1);
limit = new DateTime(now.Year, now.Month, now.Day).AddDays(-1);
}
else
{
start = new DateTime(now.Year, now.Month, now.Day);
limit = new DateTime(now.Year, now.Month, now.Day);
}
//これとは別にSection=3だった場合は1日進める
if (nowsection == 3)
{
start = start.AddDays(1);
limit = limit.AddDays(1);
}
switch (section)
{
case 1:
start += new TimeSpan(2, 0, 0);
limit += new TimeSpan(14, 0, 0);
break;
case 2:
//最終日の場合
start += new TimeSpan(14, 0, 0);
if (start.AddDays(1).Day == 1)
{
limit += new TimeSpan(22, 0, 0);
}
limit += new TimeSpan(26, 0, 0);
break;
case 3:
start += new TimeSpan(22, 0, 0);
limit += new TimeSpan(26, 0, 0);
break;
}
//セクション終わってた場合
if (now >= limit) return "確定";
//始まってない場合
else if (nowsection != section) return "待ち" + (start - now).ToString(@"h\:mm");
//セクション中の場合
else return "あと" + (limit - now).ToString(@"h\:mm");
}
