ASP中实现字符部位类似.NET里String对象的PadLeft和PadRight函数

论坛里又有人问起日期怎样格式化为:2004-08-09 05:02:20这样的格式:于是写了一个左(右)对齐的函数.这函数等价于.net里string对象的padleft和padright函数

function padleft(value,length,schar)
  dim strtext,i
  strtext = string(length,schar)
  strtext = strtext & value
  leftpad = right(strtext,length)
end function

改一下最下面则为这样:

function padright(value,length,schar)
  dim strtext,i
  strtext = string(length,schar)
  strtext = value & strtext
  leftpad = left(strtext,length)
end function

使用例子:日期显示

aa = year(now) & "-" & padleft(month(now),2,"0") & "-" & padleft(day(now),2,"0") & " " & padleft(hour(now),2,"0") & ":" & padleft(minute(now),2,"0") & ":" & padleft(second(now),2,"0")

万能时间补位代码

public function formatdate(dateandtime, para) '格式化日期(日期时间,格式) 
dim y, m, d, h, f, s 
if not isnumeric(para) or not isdate(dateandtime) then exit function 
y = cstr(year(dateandtime)) 
m = cstr(month(dateandtime)):if len(m) = 1 then m = "0" & m 
d = cstr(day(dateandtime)):if len(d) = 1 then d = "0" & d 
h = cstr(hour(dateandtime)):if len(h) = 1 then h = "0" & h 
f = cstr(minute(dateandtime)):if len(f) = 1 then f = "0" & f 
s = cstr(second(dateandtime)):if len(s) = 1 then s = "0" & s 
select case para 
  case "0" 
    formatdate = y & "-" & m & "-" & d & " " & h & ":" & f & ":" & s 
  case "1" 
    formatdate = y & "-" & m & "-" & d & " " & h & ":" & f 
  case "2" 
    formatdate = y & "-" & m & "-" & d 
  case "3" 
    formatdate = y & "/" & m & "/" & d 
  case "4" 
    formatdate = y & "年" & m & "月" & d & "日" 
  case "5" 
    formatdate = m & "-" & d & " " & h & ":" & f 
  case "6" 
    formatdate = m & "/" & d 
  case "7" 
    formatdate = m & "月" & d & "日" 
  case "8" 
    formatdate = y & "年" & m & "月" 
  case "9" 
    formatdate = y & "-" & m 
  case "10" 
    formatdate = y & "/" & m 
  case "11" 
    formatdate = right(y,2) & "-" &m & "-" & d & " " & h & ":" & f 
  case "12" 
    formatdate = right(y,2) & "-" &m & "-" & d 
  case "13" 
    formatdate = m & "-" & d 
  case else 
    formatdate = dateandtime 
end select 
end function 
response.write formatdate(now,"2")

asp一段自动补位的函数

function formatsn(getnum,getbit)
dim formatsnnum,formatsnpre,formatsnj
formatsnnum = getbit – len(getnum)
for formatsnj = 1 to formatsnnum
formatsnpre = formatsnpre & "0"
next
formatsn = formatsnpre & getnum
end function

使用方法

formatsn(getnum,getbit)

getnum 计数
getbit 共几位

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