本文實例講述了C#獲取每個年,月,周的起始日期和結束日期的方法。分享給大家供大家參考，具體如下：
我們在寫程序的時候往往要計算出年,月,周的開始日期和結束日期,在這里給出統一求解方法
/// <summary>/// 聲明期間類型枚舉/// </summary>public enum Period {Day, Week, Month, Year};/// <summary>/// 獲取指定期間的起止日期/// </summary>/// <param name="period">期間類型</param>/// <param name="beginDate">開始日期</param>/// <param name="endDate">結束日期</param>public static void GetPeriod(Period period, out DateTime beginDate, out DateTime endDate){ int year = DateTime.Today.Year; int month = DateTime.Today.Month; switch (period) { case Period.Year: //年 beginDate = new DateTime(year, 1, 1); endDate = new DateTime(year, 12, 31); break; case Period.Month: //月 beginDate = new DateTime(year, month, 1); endDate = beginDate.AddMonths(1).AddDays(-1); break; case Period.Week: //周 int week = (int)DateTime.Today.DayOfWeek; if (week == 0) week = 7; //周日 beginDate = DateTime.Today.AddDays(-(week - 1)); endDate = beginDate.AddDays(6); break; default: //日 beginDate = DateTime.Today; endDate = DateTime.Today; break; }}希望本文所述對大家C#程序設計有所幫助。
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