asp 常用函數(shù)用法
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Array() FUNCTION: 返回一個(gè)數(shù)組 SYNTAX: Array(list) ARGUMENTS: 字符,數(shù)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(gè)包含7個(gè)元素的數(shù)組myArray myArray("Sunday","Monday", ... ... "Saturday") CInt() FUNCTION: 將一個(gè)表達(dá)式轉(zhuǎn)化為數(shù)字類型 SYNTAX: CInt(expression) ARGUMENTS: 任何有效的字符均可 EXAMPLE: <% f = "234" response.write cINT(f) + 2 %> 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(gè)已注冊的ACTIVEX組件的實(shí)例。 SYNTAX: CreateObject(objName) ARGUMENTS: objName 是任何一個(gè)有效、已注冊的ACTIVEX組件的名字. EXAMPLE: <% Set con = Server.CreateObject("ADODB.Connection") %> RESULT: CStr() FUNCTION: 轉(zhuǎn)化一個(gè)表達(dá)式為字符串. SYNTAX: CStr(expression) ARGUMENTS: expression 是任何有效的表達(dá)式。 EXAMPLE: <% s = 3 + 2 response.write "The result is: " & cStr(s) %> RESULT: 轉(zhuǎn)化數(shù)字“5”為字符“5”。 Date() FUNCTION: 返回當(dāng)前系統(tǒng)日期. SYNTAX: Date() ARGUMENTS: None. EXAMPLE: <%=Date%> RESULT: 8/4/99 DateAdd() FUNCTION: 返回一個(gè)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(gè)日期之間的差值 。 SYNTAX: DateDiff(timeinterval,date1,date2 [, firstdayofweek [, firstweekofyear>>) ARGUMENTS: timeinterval 表示相隔時(shí)間的類型,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(gè)月的第幾日 . SYNTAX: Day(date) ARGUMENTS: date 是任何有效的日期。 EXAMPLE: <%=Day(#8/4/99#)%> RESULT: 4 FormatCurrency() FUNCTION: 返回表達(dá)式,此表達(dá)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(diǎn)右側(cè)顯示位數(shù)的數(shù)值。默認(rèn)值為 -1,指示使用的是計(jì)算機(jī)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(diǎn)前面的零。 EXAMPLE: <%=FormatCurrency(34.3456)%> RESULT: $34.35 FormatDateTime() FUNCTION: 返回表達(dá)式,此表達(dá)式已被格式化為日期或時(shí)間 SYNTAX: FormatDateTime(Date, [, NamedFormat>) ARGUMENTS: NamedFormat 指示所使用的日期/時(shí)間格式的數(shù)值,如果省略,則使用 vbGeneralDate. EXAMPLE: <%=FormatDateTime("08/4/99", vbLongDate)%> RESULT: Wednesday, August 04, 1999 FormatNumber() FUNCTION: 返回表達(dá)式,此表達(dá)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(diǎn)右側(cè)顯示位數(shù)的數(shù)值。默認(rèn)值為 -1,指示使用的是計(jì)算機(jī)的區(qū)域設(shè)置。; LeadingDigit i指示小數(shù)點(diǎn)右側(cè)顯示位數(shù)的數(shù)值。默認(rèn)值為 -1,指示使用的是計(jì)算機(jī)的區(qū)域設(shè)置。; Paren 指示小數(shù)點(diǎn)右側(cè)顯示位數(shù)的數(shù)值。 默認(rèn)值為 -1,指示使用的是計(jì)算機(jī)的區(qū)域設(shè)置。; GroupDigit i指示小數(shù)點(diǎn)右側(cè)顯示位數(shù)的數(shù)值。默認(rèn)值為 -1,指示使用的是 計(jì)算機(jī)的區(qū)域設(shè)置。. EXAMPLE: <%=FormatNumber(45.324567, 3)%> RESULT: 45.325 FormatPercent() FUNCTION: 返回表達(dá)式,此表達(dá)式已被格式化為尾隨有 % 符號(hào)的百分比(乘以 100 )。 (%) SYNTAX: FormatPercent(Expression [, Digit [, LeadingDigit [, Paren [, GroupDigit>>>>) ARGUMENTS: 同上. EXAMPLE: <%=FormatPercent(0.45267, 3)%> RESULT: 45.267% Hour() FUNCTION: 以24時(shí)返回小時(shí)數(shù). SYNTAX: Hour(time) ARGUMENTS: EXAMPLE: <%=Hour(#4:45:34 PM#)%> RESULT: 16 (Hour has been converted to 24-hour system) Instr() FUNCTION: 返回字符或字符串在另一個(gè)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(xì)見ASP常數(shù)) EXAMPLE: <% strText = "This is a test!!" pos = Instr(strText, "a") response.write pos %> RESULT: 9 InstrRev() FUNCTION: 同上,只是從字符串的最后一個(gè)搜索起 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?cái)?shù)值類型,不四舍五入。 SYNTAX: Int(number) ARGUMENTS: EXAMPLE: <%=INT(32.89)%> RESULT: 32 IsArray() FUNCTION: 判斷一對(duì)象是否為數(shù)組,返回布爾值 . SYNTAX: IsArray(name) ARGUMENTS: EXAMPLE: <% strTest = "Test!" response.write IsArray(strTest) %> RESULT: False IsDate() FUNCTION: 判斷一對(duì)象是否為日期,返回布爾值 SYNTAX: IsDate(expression) ARGUMENTS: expression is any valid expression. EXAMPLE: <% strTest = "8/4/99" response.write IsDate(strTest) %> RESULT: True IsEmpty() FUNCTION: 判斷一對(duì)象是否初始化,返回布爾值. SYNTAX: IsEmpty(expression) ARGUMENTS: EXAMPLE: <% Dim i response.write IsEmpty(i) %> RESULT: True IsNull() FUNCTION: 判斷一對(duì)象是否為空,返回布爾值. SYNTAX: IsNull(expression) ARGUMENTS: EXAMPLE: <% Dim i response.write IsNull(i) %> RESULT: False IsNumeric() FUNCTION: 判斷一對(duì)象是否為數(shù)字,返回布爾值. SYNTAX: IsNumeric(expression) ARGUMENTS: EXAMPLE: <% i = "345" response.write IsNumeric(i) %> RESULT: True 就算數(shù)字加了引號(hào),ASP還是認(rèn)為它是數(shù)字。 IsObject() FUNCTION: 判斷一對(duì)象是否為對(duì)象,返回布爾值. SYNTAX: IsObject(expression) ARGUMENTS: EXAMPLE: <% Set con = Server.CreateObject("ADODB.Connection") response.write IsObject(con) %> RESULT: True LBound()
FUNCTION: 返回指定數(shù)組維的最小可用下標(biāo). 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(rèn)值為 1. EXAMPLE: <% i = Array("Monday","Tuesday","Wednesday") response.write LBound(i) %> 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: <% strTest = "This is a test!" response.write LCase(strTest) %> RESULT: this is a test! Left() FUNCTION: 返回字符串左邊第length個(gè)字符以前的字符(含第length個(gè)字符). SYNTAX: Left(string, length) ARGUMENTS: EXAMPLE: <% strTest = "This is a test!" response.write Left(strTest, 3) %> RESULT: Thi Len() FUNCTION: 返回字符串的長度. SYNTAX: Len(string | varName) ARGUMENTS: EXAMPLE: <% strTest = "This is a test!" response.write Len(strTest) %> RESULT: 15 LTrim() FUNCTION: 去掉字符串左邊的空格. SYNTAX: LTrim(string) ARGUMENTS: EXAMPLE: <% strTest = " This is a test!" response.write LTrim(strTest) %> RESULT: This is a test! Mid() FUNCTION: 返回特定長度的字符串(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(shí)間的分釧. SYNTAX: Minute(time) ARGUMENTS: EXAMPLE: <%=Minute(#12:45:32 PM#)%> RESULT: 45 Month() FUNCTION: 返回日期. SYNTAX: Month(date) ARGUMENTS: date is any valid date expression. EXAMPLE: <%=Month(#08/04/99#)%> 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: <%=MonthName(Month(#08/04/99#))%> RESULT: August Now() FUNCTION: Returns the current system date and time. SYNTAX: Now() ARGUMENTS: None EXAMPLE: <%=Now%> 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: 返回字符串右邊第length個(gè)字符以前的字符(含第length個(gè)字符). SYNTAX: Right(string, length) ARGUMENTS: . EXAMPLE: <% strTest = "This is an test!" response.write Right(strTest, 3) %> RESULT: st! Rnd() FUNCTION: 產(chǎn)生一個(gè)隨機(jī)數(shù). SYNTAX: Rnd [ (number) > ARGUMENTS: EXAMPLE: <% Randomize() response.write RND() %> RESULT: 任何一個(gè)在0 到 1 之間的數(shù) Round() FUNCTION: 返回按指定位數(shù)進(jìn)行四舍五入的數(shù)值. SYNTAX: Round(expression [, numRight>) ARGUMENTS: numRight數(shù)字表明小數(shù)點(diǎn)右邊有多少位進(jìn)行四舍五入。如果省略,則 Round 函數(shù)返回整數(shù). EXAMPLE: <% i = 32.45678 response.write Round(i) %> RESULT: 32 Rtrim() FUNCTION: 去掉字符串右邊的字符串. 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: <%=Second(#12:34:28 PM#)%> RESULT: 28 StrReverse() FUNCTION: 反排一字符串 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(tǒng)時(shí)間. SYNTAX: Time() ARGUMENTS: . EXAMPLE: <%=Time%> 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: <% strTest = " This is a test!! " response.write Trim(strTest) %> RESULT: This is a test!! UBound() FUNCTION: 返回指定數(shù)組維數(shù)的最大可用下標(biāo). 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(rèn)值為 1. EXAMPLE: <% i = Array("Monday","Tuesday","Wednesday") response.write UBound(i) %> RESULT: 2 UCase() FUNCTION: 返回字符串的大寫形式. SYNTAX: UCase(string) ARGUMENTS: EXAMPLE: <% strTest = "This is a test!!" response.write UCase(strTest) %> RESULT: THIS IS A TEST!! VarType() FUNCTION: 返回指示變量子類型的值 SYNTAX: VarType(varName) ARGUMENTS: EXAMPLE: <% i = 3 response.write varType(i) %> 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: <% d = #8/4/99# response.write Weekday(d) %> 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(rèn)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: <% d = #8/4/99# response.write WeekdayName(Weekday(d)) %> RESULT: Wednesday Year() FUNCTION: 返回當(dāng)前的年份. SYNTAX: Year(date) ARGUMENTS: EXAMPLE: <%=Year(#8/4/99#)%> RESULT: 1999 該文章在 2011/2/16 9:23:10 編輯過 |
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