c# 根据年月日计算星期几

最新推荐文章于 2022-09-01 21:15:06 发布

heling0223

最新推荐文章于 2022-09-01 21:15:06 发布

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分类专栏： C# Asp.net 文章标签： c# string

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        /// <summary>
        /// 根据年月日计算星期几(Label2.Text=CaculateWeekDay(2004,12,9);)
        /// </summary>
        /// <param name="y">年</param>
        /// <param name="m">月</param>
        /// <param name="d">日</param>
        /// <returns></returns>
        public static string CaculateWeekDay(int y, int m, int d)
        {

            if (m == 1) { m = 13; y--; }
            if (m == 2) { m = 14; y--; }
            int week = (d + 2 * m + 3 * (m + 1) / 5 + y + y / 4 - y / 100 + y / 400) % 7 + 1;
            string weekstr = "";
            switch (week)
            {
                case 1: weekstr = "星期一"; break;
                case 2: weekstr = "星期二"; break;
                case 3: weekstr = "星期三"; break;
                case 4: weekstr = "星期四"; break;
                case 5: weekstr = "星期五"; break;
                case 6: weekstr = "星期六"; break;
                case 7: weekstr = "星期日"; break;
            }

            return weekstr;

        }