第一种：string[] Day = new string[] { "星期日", "星期一", "星期二", "星期三", "星期四", "星期五", "星期六" };string week = Day[Convert.ToInt32(DateTime.Now.DayOfWeek.ToString("d"))].ToString();lbDay.Text = week;第二种：lbDay.Text = System.Globalization.CultureInfo.CurrentCulture.DateTimeFormat.GetDayName(DateTime.Now.DayOfWeek);第三种：public static string dt; public static string week; dt = DateTime.Today.DayOfWeek.ToString(); switch (dt)            {                case "Monday":                    week = "星期一";                    break;                case "Tuesday":                    week = "星期二";                    break;                case "Wednesday":                    week = "星期三";                    break;                case "Thursday":                    week = "星期四";                    break;                case "Friday":                    week = "星期五";                    break;                case "Saturday":                    week = "星期六";                    break;                case "Sunday":                    week = "星期日";                    break;            }            lbDay.Text = week;