asp.net常用的验证和获取日期的方法

秒速五厘米 2022-09-18 08:51 74阅读 0赞

public string GetWeekOfFirstDay()  
        \{  
            string ReasonTime;  
            switch (DateTime.Now.Date.DayOfWeek.ToString())  
            \{  
                case "Monday":  
                    ReasonTime=DateTime.Now.Date.ToString("yyyy-MM-dd");  
                    return ReasonTime;  
                case "Tuesday":  
                    ReasonTime = DateTime.Now.AddDays(-1).ToString("yyyy-MM-dd");  
                    return ReasonTime;  
                case "Wednesday":  
                    ReasonTime = DateTime.Now.AddDays(-2).ToString("yyyy-MM-dd");  
                    return ReasonTime;  
                case "Thursday":  
                    ReasonTime = DateTime.Now.AddDays(-3).ToString("yyyy-MM-dd");  
                    return ReasonTime;  
                case "Friday":  
                    ReasonTime = DateTime.Now.AddDays(-4).ToString("yyyy-MM-dd");  
                    return ReasonTime;  
                case "Saturday":  
                    ReasonTime = DateTime.Now.AddDays(-5).ToString("yyyy-MM-dd");  
                    return ReasonTime;  
                case "Sunday":  
                    ReasonTime = DateTime.Now.AddDays(-6).ToString("yyyy-MM-dd");  
                    return ReasonTime;  
                default:  
                    return DateTime.Now.Date.DayOfWeek.ToString("yyyy-MM-dd");  
            \}  
         \}// end GetWeekOfFirstDay()  
        public string TheFirstDayOfMonth()  
        \{  
           int DayOfMonth = DateTime.Now.Day;  
           return DateTime.Now.AddDays(-DayOfMonth + 1).ToString("yyyy-MM-dd");  
        \}  
        public string TheEndDayOfMonth()  
        \{  
            int aMonthHaveDays = DateTime.DaysInMonth(DateTime.Now.Year, DateTime.Now.Month);  
            int DayOfMonth = DateTime.Now.Day;  
            int TheEndOfMonth = aMonthHaveDays - DayOfMonth;  
            return DateTime.Now.AddDays(TheEndOfMonth).ToString("yyyy-MM-dd");  
        \}  
        public string TheFirstDayOfYear()  
        \{//return2007-1-1  
            int dayOfYear = DateTime.Now.DayOfYear;  
            return DateTime.Now.AddDays(-dayOfYear + 1).ToString("yyyy-MM-dd");  
        \}  
        public string TheEndDayOfYear()  
        \{//return 2007-12-31  
           int month12HaveDays=DateTime.DaysInMonth(DateTime.Now.Year,12);  
           return DateTime.Now.Year + "-12-" + month12HaveDays;  
        \}  
        public string GetDayAddWeekofDay(string strTime)  
        \{//return 2007-3-3星期三  
            string Time = CultureInfo.CurrentCulture.Calendar.GetDayOfWeek(Convert.ToDateTime(strTime)).ToString();  
            strTime = Convert.ToDateTime(strTime).ToString("yyyy-MM-dd");  
            switch (Time)  
            \{  
                case "Monday":  
                    strTime = strTime + "(星期一)";  
                    return strTime;  
                case "Tuesday":  
                    strTime = strTime + "(星期二)";  
                    return strTime;  
                case "Wednesday":  
                    strTime = strTime + "(星期三)";  
                    return strTime;  
                case "Thursday":  
                    strTime = strTime + "(星期四)";  
                    return strTime;  
                case "Friday":  
                    strTime = strTime + "(星期五)";  
                    return strTime;  
                case "Saturday":  
                    strTime = strTime + "(星期六)";  
                    return strTime;  
                case "Sunday":  
                    strTime = strTime + "(星期日)";  
                    return strTime;  
                default:  
                    return strTime;  
            \}  
  
        \}//end GetDayAddWeekofDay(string strTime)  
        public string GetFormatTime(string time)  
        \{//return yyyy-MM-dd  
            if (time == "")  
            \{  
                return "";  
            \}  
            else  
            \{  
                return Convert.ToDateTime(time).ToString("yyyy-MM-dd");  
            \}  
        \}  
        public string GetFormatMinutes(string time)  
        \{  
            if (time == "")  
            \{  
                return "";  
            \}  
            else  
            \{  
                return Convert.ToDateTime(time).ToString("yyyy-MM-dd HH:mm");  
            \}  
        \}  
        public bool RegexLongTime(string time)  
        \{//yyyy-MM-dd hh:mm:ss  
            bool tureTime;  
  
         tureTime = System.Text.RegularExpressions.Regex.IsMatch(time, @"^(/d\{1,4\})(-|//)(/d\{1,2\})/2(/d\{1,2\}) (/d\{1,2\}):(/d\{1,2\}):(/d\{1,2\})$");  
         return tureTime;  
        \}  
        public bool RegexDate(string time)  
        \{//yyyy-MM-dd  
            bool reasonTime;  
            string regex = @"^(19|20)/d/d\[-   /.\](0\[1-9\]|1\[012\]|\[1-9\])\[-   /.\](0\[1-9\]|\[12\]\[0-9\]|3\[01\]|\[1-9\])$";  
            reasonTime = System.Text.RegularExpressions.Regex.IsMatch(time,regex);  
            return reasonTime;  
        \}  
        public bool RegexInt32(string strInt)  
        \{//int32  
            return System.Text.RegularExpressions.Regex.IsMatch(strInt, @"^/d+$");  
        \}