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#region 日期day自动加1 /// <summary> /// 将当前日期加1天 /// </summary> /// <param name="str">输入日期,如20120101</param> /// <returns></returns> public
static string dateAdd1(string
str) { //内容分解 int
year = int.Parse(str.Substring(0, 4)); int
month = int.Parse(str.Substring(4, 2)); int
day = int.Parse(str.Substring(6)); if
(month == 12) { if
(day > 31) { MessageBox.Show("进行日期自加1时,输入的day大于31"); return
""; } //若为最后一天,则年数加1 if
(day == 31) { return
(year + 1).ToString() + "0101"; } else day++; } else
if(month ==1 || month ==3 || month ==5 ||month ==7 || month ==8 || month ==10) { if
(day > 31) { MessageBox.Show("进行日期自加1时,输入的day大于31"); return
""; } //月数为31天 if
(day == 31) { if(month!=10) return
year.ToString() + "0"+(month + 1).ToString() + "01"; else return
year.ToString() + (month + 1).ToString() + "01"; } else { day++; } } else
if(month ==2) { //2月份 int
xianzhi = 28; if
(year % 4 == 0) xianzhi = 29; //闰年2月份为29天 if
(day > xianzhi) { MessageBox.Show("2月份进行日期自加1时,输入的day大于"+xianzhi.ToString()); return
""; } if
(day == xianzhi) { return
year.ToString() + "0"
+ (month + 1).ToString() + "01"; } else day++; } else { //每月30天的情形 if
(day > 30) { MessageBox.Show("进行日期自加1时,输入的day大于31"); return
""; } if
(day == 30) { if(month>8) //9+1为10，所以，9月份前也不用加0 return
year.ToString() + (month + 1).ToString() + "01"; else return
year.ToString()+"0"
+ (month + 1).ToString() + "01"; } else day++; } string
strd=day.ToString(); string
strm=month.ToString(); if(day<10) { strd= "0"+strd; } if
(month < 10) { strm = "0"
+ strm; } return
year.ToString() + strm + strd; } |
原文：http://www.cnblogs.com/DayDreamEveryWhere/p/3564184.html