当前时间+工作日 得到截止日期

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);

  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             else
125             {
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         }