获取本周的周一日期与本周的周日日期-优快云博客

本文提供了两个实用的方法：一是获取当前周的周一日期，二是获取当前周的周日日期。通过简单的C#代码实现，可以根据当前日期快速确定所在周的起始和结束日期。

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#region 获取本周周一
        /// <summary>
        /// 获取本周的周一日期
        /// </summary>
        /// <returns></returns>
       public static string GetThisWeekMonday()
        {
            DateTime date = DateTime.Now;
            DateTime firstDate = System.DateTime.Now;
            switch (date.DayOfWeek)
            {
                case System.DayOfWeek.Monday:
                   firstDate = date;
                   break;
               case System.DayOfWeek.Tuesday:
                   firstDate = date.AddDays(-1);
                   break;
               case System.DayOfWeek.Wednesday:
                    firstDate = date.AddDays(-2);
                   break;
               case System.DayOfWeek.Thursday:
                    firstDate = date.AddDays(-3);
                    break;
               case System.DayOfWeek.Friday:
                   firstDate = date.AddDays(-4);
                  break;
                case System.DayOfWeek.Saturday:
                    firstDate = date.AddDays(-5);
                    break;
               case System.DayOfWeek.Sunday:
                   firstDate = date.AddDays(-6);
                  break;
          }
            return firstDate.ToString("yyyy-MM-dd");
       }
        #endregion

        #region 获取本周的周日
      /// <summary>
       /// 获取本周的周日日期
      /// </summary>
      /// <returns></returns>
        public static string GetThisWeekSunday()
       {
            DateTime date = DateTime.Now;
            DateTime lastDate = System.DateTime.Now;
           switch (date.DayOfWeek)
            {
                case System.DayOfWeek.Monday:
                    lastDate = date.AddDays(6);
                   break;
                case System.DayOfWeek.Tuesday:
                    lastDate = date.AddDays(5);
                   break;
                case System.DayOfWeek.Wednesday:
                    lastDate = date.AddDays(4);
                    break;
                case System.DayOfWeek.Thursday:
                    lastDate = date.AddDays(3);
                  break;
              case System.DayOfWeek.Friday:
                   lastDate = date.AddDays(2);
                    break;
               case System.DayOfWeek.Saturday:
                    lastDate = date.AddDays(1);
                    break;
                case System.DayOfWeek.Sunday:
                    lastDate = date;
                   break;
           }
          return lastDate.ToString("yyyy-MM-dd");
       }
       #endregion