ASP中的函数说明

Array()?
? FUNCTION:?返回一个数组?
? SYNTAX:?Array(list)?
? ARGUMENTS:?字符，数字均可?
? EXAMPLE:?<%
Dim myArray()
For i = 1 to 7
? Redim Preserve myArray(i)
? myArray(i) = WeekdayName(i)
Next
%>?
? RESULT:?建立了一个包含7个元素的数组myArray
myArray("Sunday","Monday", ... ... "Saturday")?
?
?CInt()?
? FUNCTION:?将一个表达式转化为数字类型?
? SYNTAX:?CInt(expression)?
? ARGUMENTS:?任何有效的字符均可?
? 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:?建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:?转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:?转化数字“5”为字符“5”。?
?
?Date()?
? FUNCTION:?返回当前系统日期.?
? SYNTAX:?Date()?
? ARGUMENTS:?None.?
? EXAMPLE:?<%=Date%>?
? RESULT:?8/4/99?
?
?DateAdd()?
? FUNCTION:?返回一个被改变了的日期。?
? 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:?返回两个日期之间的差值 。?
? 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:?从8/4/99 到2000年还有 150 天.?
?
?Day()?
? FUNCTION:?返回一个月的第几日?.?
? SYNTAX:?Day(date)?
? ARGUMENTS:?date 是任何有效的日期。?
? EXAMPLE:?<%=Day(#8/4/99#)%>?
? RESULT:?4?
?
?FormatCurrency()?
? FUNCTION:?返回表达式，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:?返回表达式，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:?返回表达式，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:?返回表达式，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:?同上.?
? EXAMPLE:?<%=FormatPercent(0.45267, 3)%>?
? RESULT:?45.267%?
?
?Hour()?
? FUNCTION:?以24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:?返回字符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:?同上，只是从字符串的最后一个搜索起?
? 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:?返回数值类型,不四舍五入。?
? SYNTAX:?Int(number)?
? ARGUMENTS:?
? EXAMPLE:?<%=INT(32.89)%>?
? RESULT:?32?
?
?IsArray()?
? FUNCTION:?判断一对象是否为数组，返回布尔值?.?
? SYNTAX:?IsArray(name)?
? ARGUMENTS:?
? EXAMPLE:?<%
strTest = "Test!"
response.write IsArray(strTest)
%>?
? RESULT:?False?
?
?IsDate()?
? FUNCTION:?判断一对象是否为日期，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:?判断一对象是否初始化，返回布尔值.?
? SYNTAX:?IsEmpty(expression)?
? ARGUMENTS:?
? EXAMPLE:?<%
Dim i
response.write IsEmpty(i)
%>?
? RESULT:?True?
?
?IsNull()?
? FUNCTION:?判断一对象是否为空，返回布尔值.?
? SYNTAX:?IsNull(expression)?
? ARGUMENTS:?
? EXAMPLE:?<%
Dim i
response.write IsNull(i)
%>?
? RESULT:?False?
?
?IsNumeric()?
? FUNCTION:?判断一对象是否为数字，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:?判断一对象是否为对象，返回布尔值.?
? SYNTAX:?IsObject(expression)?
? ARGUMENTS:?
? EXAMPLE:?<%
Set con = Server.CreateObject("ADODB.Connection")
response.write IsObject(con)
%>?
? RESULT:?True?
?
?LBound()?
? FUNCTION:?返回指定数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:??返回字符串的小写形式?
? 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:?返回字符串左边第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:?返回字符串的长度.?
? 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:?返回特定长度的字符串(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:?返回时间的分钏.?
? 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:?产生一个随机数.?
? SYNTAX:?Rnd [ (number) ]?
? ARGUMENTS:?
? EXAMPLE:?<%
Randomize()
response.write RND()
%>?
? RESULT:?任何一个在0 到 1 之间的数?
?
?Round()?
? FUNCTION:?返回按指定位数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:?去掉字符串右边的字符串.?
? SYNTAX:?Rtrim(string)?
? ARGUMENTS:?
? EXAMPLE:?<%
strTest = "This is a test!! "
response.write RTrim(strTest)
%>?
? RESULT:?This is a test!!?
?
?Second()?
? FUNCTION:?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:?返回系统时间.?
? 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:?返回指定数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:?返回字符串的大写形式.?
? SYNTAX:?UCase(string)?
? ARGUMENTS:?
? EXAMPLE:?<%
strTest = "This is a test!!"
response.write UCase(strTest)
%>?
? RESULT:?THIS IS A TEST!!?
?
?VarType()?
? FUNCTION:?返回指示变量子类型的值?
? SYNTAX:?VarType(varName)?
? ARGUMENTS:?
? EXAMPLE:?<%
i = 3
response.write varType(i)
%>?
? RESULT:?2(数字)详见"asp常数"?
?
?WeekDay()?
? FUNCTION:?返回在一周的第几天.?
? SYNTAX:?WeekDay(date [, firstdayofweek])?
? ARGUMENTS:?.?
? EXAMPLE:?<%
d = #8/4/99#
response.write Weekday(d)
%>?
? RESULT:?4(星期三)?
?
?WeekDayName()?
? FUNCTION:?返回一周第几天的名字.?
? 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:?返回当前的年份.?
? SYNTAX:?Year(date)?
? ARGUMENTS:?
? EXAMPLE:?<%=Year(#8/4/99#)%>?
? RESULT:?1999?

原文转自：http://www.ltesting.net