收藏:ASP的函數(shù)詳解
- 發(fā)布于:2020-01-13
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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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