ASP中的函数说明

Array()
FUNCTION:７祷匾桓鍪组
SYNTAX:Array(list)
ARGUMENTS:Ｗ址，数字均可
EXAMPLE:<%
Dim myArray()
For i = 1 to 7
Redim Preserve myArray(i)
myArray(i) = WeekdayName(i)
Next
%>
RESULT:＝立了一个包含7个元素的数组myArray
myArray("Sunday","Monday", ... ... "Saturday")

CInt()
FUNCTION:＝一个表达式转化为数字类型
SYNTAX:CInt(expression)
ARGUMENTS:Ｈ魏斡行У淖址均可
EXAMPLE:<%
f = "234"
response.write cINT(f) + 2
%>
RESULT:236
转化字符"234"为数字"234"，如果字符串为空，则返回0值，

CreateObject()
FUNCTION:＝立和返回一个已注册的ACTIVEX组件的实例。
SYNTAX:CreateObject(objName)
ARGUMENTS:objName 是任何一个有效、已注册的ACTIVEX组件的名字.
EXAMPLE:<%
Set con = Server.CreateObject("ADODB.Connection")
%>
RESULT:

CStr()
FUNCTION:Ｗ化一个表达式为字符串.
SYNTAX:CStr(expression)
ARGUMENTS:expression 是任何有效的表达式。
EXAMPLE:<%
s = 3 + 2
response.write "The result is: " & cStr(s)
%>
RESULT:Ｗ化数字“5”为字符“5”。

Date()
FUNCTION:７祷氐鼻跋低橙掌.
SYNTAX:Date()
ARGUMENTS:None.
EXAMPLE:<%=Date%>
RESULT:8/4/99

DateAdd()
FUNCTION:７祷匾桓霰桓谋淞说娜掌凇，
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:７祷亓礁鋈掌谥间的差值 。
SYNTAX:DateDiff(timeinterval,date1,date2 [, firstdayofweek [, firstweekofyear]])
ARGUMENTS:timeinterval 表示相隔时间的类型，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:４8/4/99 到2000年还有 150 天.

Day()
FUNCTION:７祷匾桓鲈碌牡诩溉宅.
SYNTAX:Day(date)
ARGUMENTS:date 是任何有效的日期。
EXAMPLE:<%=Day(#8/4/99#)%>
RESULT:4

FormatCurrency()
FUNCTION:７祷乇泶锸剑此表达式已被格式化为货币值，
SYNTAX:FormatCurrency(Expression [, Digit [, LeadingDigit [, Paren [, GroupDigit]]]])
ARGUMENTS: Digit 指示小数点右侧显示位数的数值。默认值为 -1，指示使用的是计算机的区域设置; LeadingDigit 三态常数，指示是否显示小数值小数点前面的零。
EXAMPLE:<%=FormatCurrency(34.3456)%>
RESULT:$34.35

FormatDateTime()
FUNCTION:７祷乇泶锸剑此表达式已被格式化为日期或时间
SYNTAX:FormatDateTime(Date, [, NamedFormat])
ARGUMENTS:NamedFormat 指示所使用的日期/时间格式的数值，如果省略，则使用 vbGeneralDate.
EXAMPLE:<%=FormatDateTime("08/4/99", vbLongDate)%>
RESULT:Wednesday, August 04, 1999

FormatNumber()
FUNCTION:７祷乇泶锸剑此表达式已被格式化为数值.
SYNTAX:FormatNumber(Expression [, Digit [, LeadingDigit [, Paren [, GroupDigit]]]])
ARGUMENTS: Digit 指示小数点右侧显示位数的数值。默认值为 -1，指示使用的是计算机的区域设置。; LeadingDigit i指示小数点右侧显示位数的数值。默认值为 -1，指示使用的是计算机的区域设置。; Paren 指示小数点右侧显示位数的数值。默认值为 -1，指示使用的是计算机的区域设置。; GroupDigit i指示小数点右侧显示位数的数值。默认值为 -1，指示使用的是计算机的区域设置。.
EXAMPLE:<%=FormatNumber(45.324567, 3)%>
RESULT:45.325

FormatPercent()
FUNCTION:７祷乇泶锸剑此表达式已被格式化为尾随有 % 符号的百分比（乘以 100 ）。 (%)
SYNTAX:FormatPercent(Expression [, Digit [, LeadingDigit [, Paren [, GroupDigit]]]])
ARGUMENTS:Ｍ上.
EXAMPLE:<%=FormatPercent(0.45267, 3)%>
RESULT:45.267%

Hour()
FUNCTION:Ｒ24时返回小时数.
SYNTAX:Hour(time)
ARGUMENTS:
EXAMPLE:<%=Hour(#4:45:34 PM#)%>
RESULT:16
(Hour has been converted to 24-hour system)

Instr()
FUNCTION:７祷刈址或字符串在另一个字符串中第一次出现的位置.
SYNTAX:Instr([start, ] strToBeSearched, strSearchFor [, compare])
ARGUMENTS:Start为搜索的起始值，strToBeSearched接受搜索的字符串strSearchFor要搜索的字符.compare比较方式（详细见ASP常数）
EXAMPLE:<%
strText = "This is a test!!"
pos = Instr(strText, "a")
response.write pos
%>
RESULT:9

InstrRev()
FUNCTION:Ｍ上，只是从字符串的最后一个搜索起
SYNTAX:InstrRev([start, ] strToBeSearched, strSearchFor [, compare])
ARGUMENTS:Ｍ上.
EXAMPLE:<%
strText = "This is a test!!"
pos = InstrRev(strText, "s")
response.write pos
%>
RESULT:13


Int()
FUNCTION:７祷厥值类型,不四舍五入。
SYNTAX:Int(number)
ARGUMENTS:
EXAMPLE:<%=INT(32.89)%>
RESULT:32

IsArray()
FUNCTION:Ｅ卸弦欢韵笫欠裎数组，返回布尔值.
SYNTAX:IsArray(name)
ARGUMENTS:
EXAMPLE:<%
strTest = "Test!"
response.write IsArray(strTest)
%>
RESULT:False

IsDate()
FUNCTION:Ｅ卸弦欢韵笫欠裎日期，返回布尔值
SYNTAX:IsDate(expression)
ARGUMENTS:expression is any valid expression.
EXAMPLE:<%
strTest = "8/4/99"
response.write IsDate(strTest)
%>
RESULT:True

IsEmpty()
FUNCTION:Ｅ卸弦欢韵笫欠癯跏蓟，返回布尔值.
SYNTAX:IsEmpty(expression)
ARGUMENTS:
EXAMPLE:<%
Dim i
response.write IsEmpty(i)
%>
RESULT:True

IsNull()
FUNCTION:Ｅ卸弦欢韵笫欠裎空，返回布尔值.
SYNTAX:IsNull(expression)
ARGUMENTS:
EXAMPLE:<%
Dim i
response.write IsNull(i)
%>
RESULT:False

IsNumeric()
FUNCTION:Ｅ卸弦欢韵笫欠裎数字，返回布尔值.
SYNTAX:IsNumeric(expression)
ARGUMENTS:
EXAMPLE:<%
i = "345"
response.write IsNumeric(i)
%>
RESULT:True
就算数字加了引号，ASP还是认为它是数字。

IsObject()
FUNCTION:Ｅ卸弦欢韵笫欠裎对象，返回布尔值.
SYNTAX:IsObject(expression)
ARGUMENTS:
EXAMPLE:<%
Set con = Server.CreateObject("ADODB.Connection")
response.write IsObject(con)
%>
RESULT:True

LBound()
FUNCTION:７祷刂付ㄊ组维的最小可用下标.
SYNTAX:Lbound(arrayname [, dimension])
ARGUMENTS:; dimension 指明要返回哪一维下界的整数。使用 1 表示第一维，2 表示第二维，以此类推。如果省略 dimension 参数，默认值为 1.
EXAMPLE:<%
i = Array("Monday","Tuesday","Wednesday")
response.write LBound(i)
%>
RESULT:0

LCase()
FUNCTION:，７祷刈址串的小写形式
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:７祷刈址串左边第length个字符以前的字符（含第length个字符).
SYNTAX:Left(string, length)
ARGUMENTS:
EXAMPLE:<%
strTest = "This is a test!"
response.write Left(strTest, 3)
%>
RESULT:Thi

Len()
FUNCTION:７祷刈址串的长度.
SYNTAX:Len(string | varName)
ARGUMENTS:
EXAMPLE:<%
strTest = "This is a test!"
response.write Len(strTest)
%>
RESULT:15

LTrim()
FUNCTION:Ｈサ糇址串左边的空格.
SYNTAX:LTrim(string)
ARGUMENTS:
EXAMPLE:<%
strTest = " This is a test!"
response.write LTrim(strTest)
%>
RESULT:This is a test!

Mid()
FUNCTION:７祷靥囟ǔざ鹊淖址串(从start开始,长度为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:７祷厥奔涞姆诸.
SYNTAX:Minute(time)
ARGUMENTS:
EXAMPLE:<%=Minute(#12:45:32 PM#)%>
RESULT:45

Month()
FUNCTION:７祷厝掌.
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:７祷刈址串右边第length个字符以前的字符（含第length个字符).
SYNTAX:Right(string, length)
ARGUMENTS:.
EXAMPLE:<%
strTest = "This is an test!"
response.write Right(strTest, 3)
%>
RESULT:st!

Rnd()
FUNCTION:２生一个随机数.
SYNTAX:Rnd [ (number) ]
ARGUMENTS:
EXAMPLE:<%
Randomize()
response.write RND()
%>
RESULT:Ｈ魏我桓鲈0 到 1 之间的数

Round()
FUNCTION:７祷匕粗付ㄎ皇进行四舍五入的数值.
SYNTAX:Round(expression [, numRight])
ARGUMENTS:numRight数字表明小数点右边有多少位进行四舍五入。如果省略，则 Round 函数返回整数.
EXAMPLE:<%
i = 32.45678
response.write Round(i)
%>
RESULT:32

Rtrim()
FUNCTION:Ｈサ糇址串右边的字符串.
SYNTAX:Rtrim(string)
ARGUMENTS:
EXAMPLE:<%
strTest = "This is a test!! "
response.write RTrim(strTest)
%>
RESULT:This is a test!!

Second()
FUNCTION:７祷孛.
SYNTAX:Second(time)
ARGUMENTS:.
EXAMPLE:<%=Second(#12:34:28 PM#)%>
RESULT:28

StrReverse()
FUNCTION:７磁乓蛔址串
SYNTAX:StrReverse(string)
ARGUMENTS:
EXAMPLE:<%
strTest = "This is a test!!"
response.write StrReverse(strTest)
%>
RESULT:!!tset a si sihT

Time()
FUNCTION:７祷叵低呈奔.
SYNTAX:Time()
ARGUMENTS:.
EXAMPLE:<%=Time%>
RESULT:9:58:28 AM

Trim()
FUNCTION:Ｈサ糇址串左右的空格.
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:７祷刂付ㄊ组维数的最大可用下标.
SYNTAX:Ubound(arrayname [, dimension])
ARGUMENTS:; dimension (optional) 指定返回哪一维上界的整数。1 表示第一维，2 表示第二维，以此类推。如果省略 dimension 参数，则默认值为 1.
EXAMPLE:<%
i = Array("Monday","Tuesday","Wednesday")
response.write UBound(i)
%>
RESULT:2

UCase()
FUNCTION:７祷刈址串的大写形式.
SYNTAX:UCase(string)
ARGUMENTS:
EXAMPLE:<%
strTest = "This is a test!!"
response.write UCase(strTest)
%>
RESULT:THIS IS A TEST!!

VarType()
FUNCTION:７祷刂甘颈淞孔永嘈偷闹惮
SYNTAX:VarType(varName)
ARGUMENTS:
EXAMPLE:<%
i = 3
response.write varType(i)
%>
RESULT:2(数字)详见"asp常数"

WeekDay()
FUNCTION:７祷卦谝恢艿牡诩柑.
SYNTAX:WeekDay(date [, firstdayofweek])
ARGUMENTS:.
EXAMPLE:<%
d = #8/4/99#
response.write Weekday(d)
%>
RESULT:4(星期三)

WeekDayName()
FUNCTION:７祷匾恢艿诩柑斓拿字.
SYNTAX:WeekDayName(weekday [, Abb [, firstdayofweek]])
ARGUMENTS:Abb可选。Boolean 值，指明是否缩写表示星期各天的名称。如果省略， 默认值为 False，即不缩写星期各天的名称.firstdayofweek指明星期第一天的数值
EXAMPLE:<%
d = #8/4/99#
response.write WeekdayName(Weekday(d))
%>
RESULT:Wednesday

Year()
FUNCTION:７祷氐鼻暗哪攴.
SYNTAX:Year(date)
ARGUMENTS:
EXAMPLE:<%=Year(#8/4/99#)%>
RESULT:1999