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收藏:ASP的函數(shù)詳解

  • 發(fā)布于:2020-01-13
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  ASP的函數(shù)詳解
  join(expression,"連接符")
  split :接收相關(guān)的參數(shù),使之成為數(shù)組。

  Array()
  FUNCTION: 返回一個數(shù)組
  SYNTAX: Array(list)
  ARGUMENTS: 字符,數(shù)字均可
  EXAMPLE:
  RESULT: 建立了一個包含7個元素的數(shù)組myArray
  myArray("Sunday","Monday", ... ... "Saturday")

  CInt()
  FUNCTION: 將一個表達式轉(zhuǎn)化為數(shù)字類型 四舍五入的整數(shù),相關(guān)函數(shù):
  Csng Cdbl 轉(zhuǎn)為實數(shù)!
  
  SYNTAX: CInt(expression)
  ARGUMENTS: 任何有效的字符均可
  EXAMPLE:
  RESULT: 236
  轉(zhuǎn)化字符"234"為數(shù)字"234",如果字符串為空,則返回0值

  CreateObject()
  FUNCTION: 建立和返回一個已注冊的ACTIVEX組件的實例。
  SYNTAX: CreateObject(objName)
  ARGUMENTS: objName 是任何一個有效、已注冊的ACTIVEX組件的名字.
  EXAMPLE:
  RESULT:

  CStr()
  FUNCTION: 轉(zhuǎn)化一個表達式為字符串.
  SYNTAX: CStr(expression)
  ARGUMENTS: expression 是任何有效的表達式。
  EXAMPLE:
  RESULT: 轉(zhuǎn)化數(shù)字“5”為字符“5”。

  Date()
  FUNCTION: 返回當前系統(tǒng)日期.
  SYNTAX: Date()
  ARGUMENTS: None.
  EXAMPLE:
  RESULT: 8/4/99

  DateAdd()
  FUNCTION: 返回一個被改變了的日期。
  SYNTAX: DateAdd(timeinterval,number,date)
  ARGUMENTS: timeinterval is the time interval to add; number is amount of time intervals to add; and date is the starting date.
  EXAMPLE:

  
  RESULT: 11/4/99
  3:34:45 PM

  "m" = "month";
  "d" = "day";

  If currentDate is in time format then,
  "h" = "hour";
  "s" = "second";

  DateDiff()
  FUNCTION: 返回兩個日期之間的差值 。
  SYNTAX: DateDiff(timeinterval,date1,date2 [, firstdayofweek [, firstweekofyear]])
  ARGUMENTS: timeinterval 表示相隔時間的類型,如“M“表示“月”。
  EXAMPLE:
  RESULT: 從8/4/99 到2000年還有 150 天.

  Day()
  FUNCTION: 返回一個月的第幾日 .
  SYNTAX: Day(date)
  ARGUMENTS: date 是任何有效的日期。
  EXAMPLE:
  RESULT: 4

  FormatCurrency()
  FUNCTION: 返回表達式,此表達式已被格式化為貨幣值
  SYNTAX: FormatCurrency(Expression [, Digit [, LeadingDigit [, Paren [, GroupDigit]]]])
  ARGUMENTS: Digit 指示小數(shù)點右側(cè)顯示位數(shù)的數(shù)值。默認值為 -1,指示使用的是計算機的區(qū)域設(shè)置;   LeadingDigit 三態(tài)常數(shù),指示是否顯示小數(shù)值小數(shù)點前面的零。
  EXAMPLE:
  RESULT: $34.35

  FormatDateTime()
  FUNCTION: 返回表達式,此表達式已被格式化為日期或時間
  SYNTAX: FormatDateTime(Date, [, NamedFormat])
  ARGUMENTS: NamedFormat 指示所使用的日期/時間格式的數(shù)值,如果省略,則使用 vbGeneralDate.
  EXAMPLE:
  RESULT: Wednesday, August 04, 1999

  FormatNumber()
  FUNCTION: 返回表達式,此表達式已被格式化為數(shù)值.
  SYNTAX: FormatNumber(Expression [, Digit [, LeadingDigit [, Paren [, GroupDigit]]]])
  ARGUMENTS: Digit 指示小數(shù)點右側(cè)顯示位數(shù)的數(shù)值。默認值為 -1,指示使用的是計算機的區(qū)域設(shè)置。; LeadingDigit i指示小數(shù)點右側(cè)顯示位數(shù)的數(shù)值。默認值為 -1,指示使用的是計算機的區(qū)域設(shè)置。; Paren 指示小數(shù)點右側(cè)顯示位數(shù)的數(shù)值。默認值為 -1,指示使用的是計算機的區(qū)域設(shè)置。; GroupDigit i指示小數(shù)點右側(cè)顯示位數(shù)的數(shù)值。默認值為 -1,指示使用的是計算機的區(qū)域設(shè)置。.
  EXAMPLE:
  RESULT: 45.325

  FormatPercent()
  FUNCTION: 返回表達式,此表達式已被格式化為尾隨有 % 符號的百分比(乘以 100 )。 (%)
  SYNTAX: FormatPercent(Expression [, Digit [, LeadingDigit [, Paren [, GroupDigit]]]])
  ARGUMENTS: 同上.
  EXAMPLE:
  RESULT: 45.267%

  Hour()
  FUNCTION: 以24時返回小時數(shù).
  SYNTAX: Hour(time)
  ARGUMENTS:
  EXAMPLE:
  RESULT: 16
  (Hour has been converted to 24-hour system)

  Instr()
  FUNCTION: 返回字符或字符串在另一個字符串中第一次出現(xiàn)的位置.
  SYNTAX: Instr([start, ] strToBeSearched, strSearchFor [, compare])
  ARGUMENTS: Start為搜索的起始值,strToBeSearched接受搜索的字符串 strSearchFor要搜索的字符compare 比較方式(詳細見ASP常數(shù))
  EXAMPLE:
  RESULT: 9

  InstrRev()
  FUNCTION: 同上,只是從字符串的最后一個搜索起
  SYNTAX: InstrRev([start, ] strToBeSearched, strSearchFor [, compare])
  ARGUMENTS: 同上.
  EXAMPLE:
  RESULT: 13


  Int()
  FUNCTION: 返回數(shù)值類型,不四舍五入。
  SYNTAX: Int(number)
  ARGUMENTS:
  EXAMPLE:
  RESULT: 32

  IsArray()
  FUNCTION: 判斷一對象是否為數(shù)組,返回布爾值 .
  SYNTAX: IsArray(name)
  ARGUMENTS:
  EXAMPLE:
  RESULT: False

  IsDate()
  FUNCTION: 判斷一對象是否為日期,返回布爾值
  SYNTAX: IsDate(expression)
  ARGUMENTS: expression is any valid expression.
  EXAMPLE:
  RESULT: True

  IsEmpty()
  FUNCTION: 判斷一對象是否初始化,返回布爾值.
  SYNTAX: IsEmpty(expression)
  ARGUMENTS:
  EXAMPLE:
  RESULT: True

  IsNull()
  FUNCTION: 判斷一對象是否為空,返回布爾值.
  SYNTAX: IsNull(expression)
  ARGUMENTS:
  EXAMPLE:
  RESULT: False

  IsNumeric()
  FUNCTION: 判斷一對象是否為數(shù)字,返回布爾值.
  SYNTAX: IsNumeric(expression)
  ARGUMENTS:
  EXAMPLE:
  RESULT: True
  就算數(shù)字加了引號,ASP還是認為它是數(shù)字。

  IsObject()
  FUNCTION: 判斷一對象是否為對象,返回布爾值.
  SYNTAX: IsObject(expression)
  ARGUMENTS:
  EXAMPLE:
  RESULT: True
  LBound()
  FUNCTION: 返回指定數(shù)組維的最小可用下標.
  SYNTAX: Lbound(arrayname [, dimension])
  ARGUMENTS: ; dimension 指明要返回哪一維下界的整數(shù)。使用 1 表示第一維,2 表示第二維,以此類  推。如果省略 dimension 參數(shù),默認值為 1.
  EXAMPLE:
  RESULT: 0

  LCase()
  FUNCTION: 返回字符串的小寫形式
  SYNTAX: Lcase(string)
  ARGUMENTS: string is any valid string expression.
  EXAMPLE:
  RESULT: this is a test!

  Left()
  FUNCTION: 返回字符串左邊第length個字符以前的字符(含第length個字符).
  SYNTAX: Left(string, length)
  ARGUMENTS:
  EXAMPLE:
  RESULT: Thi

  Len()
  FUNCTION: 返回字符串的長度.
  SYNTAX: Len(string | varName)
  ARGUMENTS:
  EXAMPLE:
  RESULT: 15

  LTrim()
  FUNCTION: 去掉字符串左邊的空格.
  SYNTAX: LTrim(string)
  ARGUMENTS:
  EXAMPLE:
  RESULT: This is a test!

  Mid()
  FUNCTION: 返回特定長度的字符串(從start開始,長度為length).
  SYNTAX: Mid(string, start [, length])
  ARGUMENTS:
  EXAMPLE:
  RESULT: Today

  Minute()
  FUNCTION: 返回時間的分釧.
  SYNTAX: Minute(time)
  ARGUMENTS:
  EXAMPLE:
  RESULT: 45

  Month()
  FUNCTION: 返回日期.
  SYNTAX: Month(date)
  ARGUMENTS: date is any valid date expression.
  EXAMPLE:
  RESULT: 8

  MonthName()
  FUNCTION: Returns a string identifying the specified month.
  SYNTAX: MonthName(month, [, Abb])
  ARGUMENTS: month is the numeric representation for a given month; Abb (optional) is a boolean value used to display month abbreviation. True will display the abbreviated month name and False (default) will not show the abbreviation.
  EXAMPLE:
  RESULT: August

  Now()
  FUNCTION: Returns the current system date and time.
  SYNTAX: Now()
  ARGUMENTS: None
  EXAMPLE:
  RESULT: 8/4/99 9:30:16 AM

  Replace()
  FUNCTION: Returns a string in which a specified sub-string has been replaced with another substring a specified number of times.
  SYNTAX: Replace(strToBeSearched, strSearchFor, strReplaceWith [, start [, count [, compare]]])
  ARGUMENTS: strToBeSearched is a string expression containing a sub-string to be replaced; strSearchFor is the string expression to search for within strToBeSearched; strReplaceWith is the string expression to replace sub-string strSearchFor; start (optional) is the numeric character position to begin search; count (optional) is a value indicating the comparision constant.
  EXAMPLE:
  RESULT: This is an orange!

  Right()
  FUNCTION: 返回字符串右邊第length個字符以前的字符(含第length個字符).
  SYNTAX: Right(string, length)
  ARGUMENTS: .
  EXAMPLE:
  RESULT: st!

  Rnd()
  FUNCTION: 產(chǎn)生一個隨機數(shù).
  SYNTAX: Rnd [ (number) ]
  ARGUMENTS:
  EXAMPLE:
  RESULT: 任何一個在0 到 1 之間的數(shù)

  Round()
  FUNCTION: 返回按指定位數(shù)進行四舍五入的數(shù)值.
  SYNTAX: Round(expression [, numRight])
  ARGUMENTS: numRight數(shù)字表明小數(shù)點右邊有多少位進行四舍五入。如果省略,則 Round 函數(shù)返回整數(shù).
  EXAMPLE:
  RESULT: 32

  Rtrim()
  FUNCTION: 去掉字符串右邊的字符串.
  SYNTAX: Rtrim(string)
  ARGUMENTS:
  EXAMPLE:
  RESULT: This is a test!!

  Second()
  FUNCTION: 返回秒.
  SYNTAX: Second(time)
  ARGUMENTS: .
  EXAMPLE:
  RESULT: 28

  StrReverse()
  FUNCTION: 反排一字符串
  SYNTAX: StrReverse(string)
  ARGUMENTS:
  EXAMPLE:
  RESULT: !!tset a si sihT

  Time()
  FUNCTION: 返回系統(tǒng)時間.
  SYNTAX: Time()
  ARGUMENTS: .
  EXAMPLE:
  RESULT: 9:58:28 AM

  Trim()
  FUNCTION: 去掉字符串左右的空格.
  SYNTAX: Trim(string)
  ARGUMENTS: string is any valid string expression.
  EXAMPLE:
  RESULT: This is a test!!

  UBound()
  FUNCTION: 返回指定數(shù)組維數(shù)的最大可用下標.
  SYNTAX: Ubound(arrayname [, dimension])
  ARGUMENTS: ; dimension (optional) 指定返回哪一維上界的整數(shù)。1 表示第一維,2 表示第二維,以此類推。如果省略 dimension 參數(shù),則默認值為 1.
  EXAMPLE:
  RESULT: 2

  UCase()
  FUNCTION: 返回字符串的大寫形式.
  SYNTAX: UCase(string)
  ARGUMENTS:
  EXAMPLE:
  RESULT: THIS IS A TEST!!

  VarType()
  FUNCTION: 返回指示變量子類型的值
  SYNTAX: VarType(varName)
  ARGUMENTS:
  EXAMPLE:
  RESULT: 2(數(shù)字)詳見"asp常數(shù)"

  WeekDay()
  FUNCTION: 返回在一周的第幾天.
  SYNTAX: WeekDay(date [, firstdayofweek])
  ARGUMENTS: .
  EXAMPLE:
  RESULT: 4(星期三)

  WeekDayName()
  FUNCTION: 返回一周第幾天的名字.
  SYNTAX: WeekDayName(weekday [, Abb [, firstdayofweek]])
  ARGUMENTS: Abb可選。Boolean 值,指明是否縮寫表示星期各天的名稱。如果省略, 默認值為 False,即不縮寫星期各天的名稱.firstdayofweek指明星期第一天的數(shù)值
  EXAMPLE:
  RESULT: Wednesday

  Year()
  FUNCTION: 返回當前的年份.
  SYNTAX: Year(date)
  ARGUMENTS:
  EXAMPLE:
  RESULT: 1999
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