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当前时间+工作日 得到截止日期
客户希望实现计算工作日，除去公休日、节假日，并且规定的公休日上班要算作工作日。
如：2014-06-25 是礼拜三加上3天，是2014-06-28礼拜六。那么得到的时间应该是2014-06-30。
1、后台调用：
1 int days = 3;//累计加的天数2 DateTime add_date = DateTime.Now;3 EndDate enddate = new EndDate();4 count_date = enddate.Get_Days(add_date, days, 0);
2、实现方法：
1 /// <summary> 2 /// 计算当天是否为公休公休 3 /// </summary> 4 /// <param name="time"></param> 5 /// <returns></returns> 6 public static int GetPublicHoliday(DateTime time) 7 { 8 DBhelp db = new DBhelp(); 9 int gongXiuTianShu = 0; 10 string endWeek = ""; 11 12 DataTable listDayRest = db.getTable("select * from L_day_rest where rest_type=‘3‘");//公休日，上班 13 if (listDayRest.Rows.Count > 0) 14 { 15 for (int i = 0; i < listDayRest.Rows.Count; i++) 16 { 17 if (listDayRest.Rows[i]["start_date"] != null && listDayRest.Rows[i]["start_date"].ToString() != null) 18 { 19 if (time.ToShortDateString() == Convert.ToDateTime(listDayRest.Rows[i]["start_date"].ToString()).ToShortDateString()) 20 { 21 return gongXiuTianShu; 22 } 23 } 24 } 25 } 26 27 //转换成中文星期几 28 switch (time.DayOfWeek.ToString()) 29 { 30 case "Sunday": endWeek = "星期天"; break; 31 case "Monday": endWeek = "星期一"; break; 32 case "Tuesday": endWeek = "星期二"; break; 33 case "Wednesday": endWeek = "星期三"; break; 34 case "Thursday": endWeek = "星期四"; break; 35 case "Friday": endWeek = "星期五"; break; 36 case "Saturday": endWeek = "星期六"; break; 37 } 38 listDayRest = db.getTable("select * from L_day_rest where rest_type=‘2‘");//获得法定节日 39 if (listDayRest.Rows.Count > 0) 40 { 41 string GongXiu1 = listDayRest.Rows[0]["start_date"].ToString(); 42 string GongXiu2 = listDayRest.Rows[0]["end_time"].ToString(); 43 for (int i = 0; i < listDayRest.Rows.Count; i++)//循环遍历法定节日 44 { 45 if (time >= Convert.ToDateTime(listDayRest.Rows[0]["start_date"].ToString()) && time < Convert.ToDateTime(listDayRest.Rows[0]["end_time"].ToString())) 46 { 47 TimeSpan ts = Convert.ToDateTime(listDayRest.Rows[0]["end_time"].ToString()) - time; 48 gongXiuTianShu = ts.Days + 1; 49 } 50 else if (time > Convert.ToDateTime(listDayRest.Rows[0]["start_date"].ToString()) && time <= Convert.ToDateTime(listDayRest.Rows[0]["end_time"].ToString())) 51 { 52 TimeSpan ts = Convert.ToDateTime(listDayRest.Rows[0]["end_time"].ToString()) - time; 53 gongXiuTianShu = ts.Days + 1; 54 } 55 else if (time == Convert.ToDateTime(listDayRest.Rows[0]["start_date"].ToString()) && time == Convert.ToDateTime(listDayRest.Rows[0]["end_time"].ToString())) 56 { 57 gongXiuTianShu = 1; 58 } 59 60 } 61 } 62 if (gongXiuTianShu == 0 || listDayRest.Rows.Count == 0) 63 { 64 listDayRest = db.getTable("select * from L_day_rest where rest_type=‘1‘");//获得公休日 65 if (listDayRest.Rows.Count > 0) 66 { 67 string GongXiu1 = listDayRest.Rows[0]["start_date"].ToString().Trim(); 68 string GongXiu2 = listDayRest.Rows[0]["end_time"].ToString().Trim(); 69 bool isContact = IsContact(GongXiu1, GongXiu2); 70 if (isContact)//公休日连续 71 { 72 if (endWeek == GongXiu1) 73 { 74 gongXiuTianShu = 2; 75 } 76 else if (endWeek == GongXiu2) 77 { 78 gongXiuTianShu = 1; 79 } 80 } 81 else//公休日不连续 82 { 83 if (endWeek == GongXiu1 || endWeek == GongXiu2) 84 { 85 gongXiuTianShu = 1; 86 } 87 } 88 } 89 } 90 91 return gongXiuTianShu; 92 } 93 94 /// <summary> 95 /// 递归调用，计算天数 96 /// </summary> 97 /// <param name="time"></param> 98 /// <param name="days"></param> 99 /// <param name="date_days"></param>100 /// <returns></returns>101 public int Get_Days(DateTime time, int days, int date_days)102 {103 int gongXiuTianShu = 0;104 //int date_days = 0;105 int counts = 0;106 for (int i = 1; i <= days; i++)107 {108 counts = i;109 DateTime dates = time;110 gongXiuTianShu = GetPublicHoliday(dates.AddDays(i));111 112 if (gongXiuTianShu > 0 || counts == days)113 {114 date_days = date_days + gongXiuTianShu + i;115 break;116 }117 118 }119 120 if (counts > 0 && counts < days)121 {122 return Get_Days(time.AddDays(date_days), days - counts, date_days);123 }124 else125 {126 return date_days;127 }128 }129 130 /// <summary>131 /// 公休时间132 /// </summary>133 /// <returns></returns>134 private static bool IsContact(string start, string end)135 {136 bool flag = false;//定义标示137 switch (start)138 {139 case "星期天":140 if (end == "星期一")141 {142 flag = true;143 } break;144 case "星期一":145 if (end == "星期二")146 {147 flag = true;148 } break;149 case "星期二":150 if (end == "星期三")151 {152 flag = true;153 } break;154 case "星期三":155 if (end == "星期四")156 {157 flag = true;158 } break;159 case "星期四":160 if (end == "星期五")161 {162 flag = true;163 } break;164 case "星期五":165 if (end == "星期六")166 {167 flag = true;168 } break;169 case "星期六":170 if (end == "星期天")171 {172 flag = true;173 } break;174 }175 return flag;176 }
3、数据库表结构：
注：以上只是实现了基本功能，并且效率不高，因水平有限，希望能有更好的方法。
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