C#根据日期，获取星期几

sufei

[C#] 纯文本查看 复制代码

        /// <summary>
        /// 根据日期，获取星期几
        /// </summary>
        /// <param name="time"></param>
        /// <returns></returns>
        public string GetWeek(DateTime time)
        {
            int y = time.Year;
            int m = time.Month;
            int d = time.Day;
            if (m == 1 || m == 2)
            {
                m += 12;
                y--;         //把一月和二月看成是上一年的十三月和十四月，例：如果是2004-1-10则换算成：2003-13-10来代入公式计算。
            }
            int week = (d + 2 * m + 3 * (m + 1) / 5 + y + y / 4 - y / 100 + y / 400) % 7;
            string weekstr = "";
            switch (week)
            {
                case 0: weekstr = "周一"; break;
                case 1: weekstr = "周二"; break;
                case 2: weekstr = "周三"; break;
                case 3: weekstr = "周四"; break;
                case 4: weekstr = "周五"; break;
                case 5: weekstr = "周六"; break;
                case 6: weekstr = "周日"; break;
            }
            return weekstr;
        }

pdang9980

var  week = CultureInfo.CurrentCulture.DateTimeFormat.GetDayName(DateTime.Now.DayOfWeek);

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