asp常用函式 (轉)

worldblog發表於2007-12-13
asp常用函式 (轉)[@more@]

常用 
 

 
 
Array()
 FUNCTION: 返回一個陣列
 SYNTAX: Array(list)
 ARGUMENTS: 字元,數字均可
 EXAMPLE: Dim myArray()
For i = 1 to 7
  Redim Preserve myArray(i)
  myArray(i) = WeekdayName(i)
Next
%>
 RESULT: 建立了一個包含7個元素的陣列myArray
myArray("Sunday","Monday", ... ... "Saturday")
 
CInt()
 FUNCTION: 將一個轉化為數字型別
 SYNTAX: CInt(expression)
 ARGUMENTS: 任何有效的字元均可
 EXAMPLE: f = "234"
response.write cINT(f) + 2
%>
 RESULT: 236
轉化字元"234"為數字"234",如果字串為空,則返回0值 
 
Create()
 FUNCTION: 建立和返回一個已註冊的的例項。
 SYNTAX: CreateObject(objName)
 ARGUMENTS: objName 是任何一個有效、已註冊的ACTIVEX元件的名字.
 EXAMPLE: Set con = Server.CreateObject("ADO.Connection")
%>
 RESULT: 
 
CStr()
 FUNCTION: 轉化一個表示式為字串.
 SYNTAX: CStr(expression)
 ARGUMENTS: expression 是任何有效的表示式。
 EXAMPLE: s = 3 + 2
response.write "The result is: " & cStr(s)
%>
 RESULT: 轉化數字“5”為字元“5”。
 
Date()
 FUNCTION: 返回當前日期.
 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: currentDate = #8/4/99#
newDate = DateAdd("m",3,currentDate)
response.write newDate
%>

currentDate = #12:34:45 PM#
newDate = DateAdd("h",3,currentDate)
response.write newDate
%>
 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 表示相隔時間的型別,如“M“表示“月”。
 EXAMPLE: fromDate = #8/4/99#
toDate = #1/1/2000#
response.write "There are " & _
  DateDiff("d",fromDate,toDate) & _
  " days to millenium from 8/4/99."
%>
 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: 返回表示式,此表示式已被格式化為貨幣值 
 SYNTAX: FormatCurrency(Expression [, Digit ][, LeadingDigit ][, Paren ][,
GroupDigit]]]])
 ARGUMENTS: Digit 指示小數點右側顯示位數的數值。預設值為 -1,指示使用的是
的區域設定; LeadingDigit 三態常數,指示是否顯示小數值小數點前面的
零。 
 EXAMPLE:
 RESULT: $34.35
 
FormatDateTime()
 FUNCTION: 返回表示式,此表示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/時間格式的數值,如果省略,則使用
vbGeneralDate.
 EXAMPLE:
 RESULT: Wednesday, August 04, 1999
 
FormatNumber()
 FUNCTION: 返回表示式,此表示式已被格式化為數值.
 SYNTAX: FormatNumber(Expression [, Digit ][, LeadingDigit ][, Paren ][,
GroupDigit]]]])
 ARGUMENTS: Digit 指示小數點右側顯示位數的數值。預設值為 -1,指示使用的是
計算機的區域設定。; LeadingDigit i指示小數點右側顯示位數的數值。預設值為 -
1,指示使用的是計算機的區域設定。; Paren 指示小數點右側顯示位數的數值。預設
值為 -1,指示使用的是計算機的區域設定。; GroupDigit i指示小數點右側顯示位數
的數值。預設值為 -1,指示使用的是計算機的區域設定。.
 EXAMPLE:
 RESULT: 45.325
 
FormatPercent()
 FUNCTION: 返回表示式,此表示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.
 SYNTAX: Hour(time)
 ARGUMENTS: 
 EXAMPLE:
 RESULT: 16
(Hour has been converted to 24-hour system)
 
Instr()
 FUNCTION: 返回字元或字串在另一個字串中第一次出現的位置.
 SYNTAX: Instr([start, ] strToBeSearched, strSearchFor [, compare])
 ARGUMENTS: Start為搜尋的起始值,strToBeSearched接受搜尋的字串 
strSearchFor要搜尋的字元.compare比較方式(詳細見ASP常數)
 EXAMPLE: strText = "This is a test!!"
p= Instr(strText, "a")
response.write pos
%>
 RESULT: 9
 
InstrRev()
 FUNCTION: 同上,只是從字串的最後一個搜尋起
 SYNTAX: InstrRev([start, ] strToBeSearched, strSearchFor [, compare])
 ARGUMENTS: 同上.
 EXAMPLE: strText = "This is a test!!"
pos = InstrRev(strText, "s")
response.write pos
%>
 RESULT: 13

 
Int()
 FUNCTION: 返回數值型別,不四捨五入,注意取值是不大於它的整數。
 SYNTAX: Int(number)
 ARGUMENTS: 
 EXAMPLE:  
 RESULT: 32  -4
 
IsArray()
 FUNCTION: 判斷一是否為陣列,返回布林值 .
 SYNTAX: IsArray(name)
 ARGUMENTS: 
 EXAMPLE: strTest = "Test!"
response.write IsArray(strTest)
%>
 RESULT: False
 
IsDate()
 FUNCTION: 判斷一物件是否為日期,返回布林值
 SYNTAX: IsDate(expression)
 ARGUMENTS: expression is any valid expression.
 EXAMPLE: strTest = "8/4/99"
response.write IsDate(strTest)
%>
 RESULT: True
 
IsEmpty()
 FUNCTION: 判斷一物件是否初始化,返回布林值.
 SYNTAX: IsEmpty(expression)
 ARGUMENTS: 
 EXAMPLE: Dim i
response.write IsEmpty(i)
%>
 RESULT: True
 
IsNull()
 FUNCTION: 判斷一物件是否為空,返回布林值.
 SYNTAX: IsNull(expression)
 ARGUMENTS: 
 EXAMPLE: Dim i
response.write IsNull(i)
%>
 RESULT: False
 
IsNumeric()
 FUNCTION: 判斷一物件是否為數字,返回布林值.
 SYNTAX: IsNumeric(expression)
 ARGUMENTS: 
 EXAMPLE: i = "345"
response.write IsNumeric(i)
%>
 RESULT: True
就算數字加了引號,ASP還是認為它是數字。
 
IsObject()
 FUNCTION: 判斷一物件是否為物件,返回布林值.
 SYNTAX: IsObject(expression)
 ARGUMENTS: 
 EXAMPLE: Set con = Server.CreateObject("ADODB.Connection")
response.write IsObject(con)
%>
 RESULT: True
 
LBound()
 FUNCTION: 返回指定陣列維的最小可用下標.
 SYNTAX: Lbound(arrayname [, dimension])
 ARGUMENTS: ; dimension 指明要返回哪一維下界的整數。使用 1 表示第一維,2
表示第二維,以此類推。如果省略 dimension 引數,預設值為 1.
 EXAMPLE: i = Array("Monday","Tuesday","Wednesday")
response.write LBound(i)
%>
 RESULT: 0
 
LCase()
 FUNCTION:  返回字串的小寫形式
 SYNTAX: Lcase(string)
 ARGUMENTS: string is any valid string expression.
 EXAMPLE: strTest = "This is a test!"
response.write LCase(strTest)
%>
 RESULT: this is a test!
 
Left()
 FUNCTION: 返回字串左邊第length個字元以前的字元(含第length個字元).
 SYNTAX: Left(string, length)
 ARGUMENTS: 
 EXAMPLE: strTest = "This is a test!"
response.write Left(strTest, 3)
%>
 RESULT: Thi
 
Len()
 FUNCTION: 返回字串的長度.
 SYNTAX: Len(string | varName)
 ARGUMENTS: 
 EXAMPLE: strTest = "This is a test!"
response.write Len(strTest)
%>
 RESULT: 15
 
LTrim()
 FUNCTION: 去掉字串左邊的空格.
 SYNTAX: LTrim(string)
 ARGUMENTS: 
 EXAMPLE: strTest = " This is a test!"
response.write LTrim(strTest)
%>
 RESULT: This is a test!
 
Mid()
 FUNCTION: 返回特定長度的字串(從start開始,長度為length).
 SYNTAX: Mid(string, start [, length])
 ARGUMENTS: 
 EXAMPLE: strTest = "This is a test! Today is Monday."
response.write Mid(strTest, 17, 5)
%>
 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 ntifying 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: strTest = "This is an apple!"
response.write Replace(strTest, "apple", "orange")
%>
 RESULT: This is an orange!
 
Right()
 FUNCTION: 返回字串右邊第length個字元以前的字元(含第length個字元).
 SYNTAX: Right(string, length)
 ARGUMENTS: .
 EXAMPLE: strTest = "This is an test!"
response.write Right(strTest, 3)
%>
 RESULT: st!
 
Rnd()
 FUNCTION: 產生一個隨機數.
 SYNTAX: Rnd [ (number) ]
 ARGUMENTS: 
 EXAMPLE: Ranize()
response.write RND()
%>
 RESULT: 任何一個在0 到 1 之間的數
 
Round()
 FUNCTION: 返回按指定位數進行四捨五入的數值.
 SYNTAX: Round(expression [, numRight])
 ARGUMENTS: numRight數字表明小數點右邊有多少位進行四捨五入。如果省略,則
Round 函式返回整數.
 EXAMPLE: i = 32.45678
response.write Round(i)
%>
 RESULT: 32
 
Rtrim()
 FUNCTION: 去掉字串右邊的字串.
 SYNTAX: Rtrim(string)
 ARGUMENTS: 
 EXAMPLE: strTest = "This is a test!! "
response.write RTrim(strTest)
%>
 RESULT: This is a test!!
 
Second()
 FUNCTION: 返回秒.
 SYNTAX: Second(time)
 ARGUMENTS: .
 EXAMPLE:
 RESULT: 28
 
StrReverse()
 FUNCTION: 反排一字串
 SYNTAX: StrReverse(string)
 ARGUMENTS: 
 EXAMPLE: strTest = "This is a test!!"
response.write StrReverse(strTest)
%>
 RESULT: !!tset a si sihT
 
Time()
 FUNCTION: 返回系統時間.
 SYNTAX: Time()
 ARGUMENTS: .
 EXAMPLE:
 RESULT: 9:58:28 AM
 
Trim()
 FUNCTION: 去掉字串左右的空格.
 SYNTAX: Trim(string)
 ARGUMENTS: string is any valid string expression.
 EXAMPLE: strTest = " This is a test!! "
response.write Trim(strTest)
%>
 RESULT: This is a test!!
 
UBound()
 FUNCTION: 返回指定陣列維數的最大可用下標.
 SYNTAX: Ubound(arrayname [, dimension])
 ARGUMENTS: ; dimension (optional) 指定返回哪一維上界的整數。1 表示第一
維,2 表示第二維,以此類推。如果省略 dimension 引數,則預設值為 1.
 EXAMPLE: i = Array("Monday","Tuesday","Wednesday")
response.write UBound(i)
%>
 RESULT: 2
 
UCase()
 FUNCTION: 返回字串的大寫形式.
 SYNTAX: UCase(string)
 ARGUMENTS: 
 EXAMPLE: strTest = "This is a test!!"
response.write UCase(strTest)
%>
 RESULT: THIS IS A TEST!!
 
VarType()
 FUNCTION: 返回指示變數子型別的值
 SYNTAX: VarType(varName)
 ARGUMENTS: 
 EXAMPLE: i = 3
response.write varType(i)
%>
 RESULT: 2(數字)詳見"asp常數"
 
WeekDay()
 FUNCTION: 返回在一週的第幾天.
 SYNTAX: WeekDay(date [, firstdayofweek])
 ARGUMENTS: .
 EXAMPLE: d = #8/4/99#
response.write Weekday(d)
%>
 RESULT: 4(星期三)
 
WeekDayName()
 FUNCTION: 返回一週第幾天的名字.
 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, 預設值為 False,即不縮寫星期各天的名稱.firstdayofweek指明星期第一天的
數值
 EXAMPLE: d = #8/4/99#
response.write WeekdayName(Weekday(d))
%>
 RESULT: Wednesday
 
Year()
 FUNCTION: 返回當前的年份.
 SYNTAX: Year(date)
 ARGUMENTS: 
 EXAMPLE:
 RESULT: 1999 

 


 


來自 “ ITPUB部落格 ” ,連結:http://blog.itpub.net/10752043/viewspace-993004/,如需轉載,請註明出處,否則將追究法律責任。

相關文章