- Asp常用函数
- 作者：未知 来源：未知 添加时间：2003年3月13日 字体:大 中 小
- 83504长了点,但是很有用!
dHzcLn
dHzcLn Array()
dHzcLn FUNCTION: 返回一个数组
dHzcLn SYNTAX: Array(list)
dHzcLn ARGUMENTS: 字符，数字均可
dHzcLn EXAMPLE: <%
dHzcLn Dim myArray()
dHzcLn For i = 1 to 7
dHzcLn Redim Preserve myArray(i)
dHzcLn myArray(i) = WeekdayName(i)
dHzcLn Next
dHzcLn %>
dHzcLn RESULT: 建立了一个包含7个元素的数组myArray
dHzcLn myArray("Sunday","Monday", ... ... "Saturday")
dHzcLn
dHzcLn CInt()
dHzcLn FUNCTION: 将一个表达式转化为数字类型
dHzcLn SYNTAX: CInt(expression)
dHzcLn ARGUMENTS: 任何有效的字符均可
dHzcLn EXAMPLE: <%
dHzcLn f = "234"
dHzcLn response.write cINT(f) + 2
dHzcLn %>
dHzcLn RESULT: 236
dHzcLn 转化字符"234"为数字"234"，如果字符串为空，则返回0值
dHzcLn
dHzcLn CreateObject()
dHzcLn FUNCTION: 建立和返回一个已注册的ACTIVEX组件的实例。
dHzcLn SYNTAX: CreateObject(objName)
dHzcLn ARGUMENTS: objName 是任何一个有效、已注册的ACTIVEX组件的名字.
dHzcLn EXAMPLE: <%
dHzcLn Set con = Server.CreateObject("ADODB.Connection")
dHzcLn %>
dHzcLn RESULT:
dHzcLn
dHzcLn CStr()
dHzcLn FUNCTION: 转化一个表达式为字符串.
dHzcLn SYNTAX: CStr(expression)
dHzcLn ARGUMENTS: expression 是任何有效的表达式。
dHzcLn EXAMPLE: <%
dHzcLn s = 3 + 2
dHzcLn response.write "The result is: " & cStr(s)
dHzcLn %>
dHzcLn RESULT: 转化数字“5”为字符“5”。
dHzcLn
dHzcLn Date()
dHzcLn FUNCTION: 返回当前系统日期.
dHzcLn SYNTAX: Date()
dHzcLn ARGUMENTS: None.
dHzcLn EXAMPLE: <%=Date%>
dHzcLn RESULT: 8/4/99
dHzcLn
dHzcLn DateAdd()
dHzcLn FUNCTION: 返回一个被改变了的日期。
dHzcLn SYNTAX: DateAdd(timeinterval,number,date)
dHzcLn ARGUMENTS: timeinterval is the time interval to add; number is amount of
dHzcLn time intervals to add; and date is the starting date.
dHzcLn EXAMPLE: <%
dHzcLn currentDate = #8/4/99#
dHzcLn newDate = DateAdd("m",3,currentDate)
dHzcLn response.write newDate
dHzcLn %>
dHzcLn
dHzcLn <%
dHzcLn currentDate = #12:34:45 PM#
dHzcLn newDate = DateAdd("h",3,currentDate)
dHzcLn response.write newDate
dHzcLn %>
dHzcLn RESULT: 11/4/99
dHzcLn 3:34:45 PM
dHzcLn
dHzcLn "m" = "month";
dHzcLn "d" = "day";
dHzcLn
dHzcLn If currentDate is in time format then,
dHzcLn "h" = "hour";
dHzcLn "s" = "second";
dHzcLn
dHzcLn DateDiff()
dHzcLn FUNCTION: 返回两个日期之间的差值 。
dHzcLn SYNTAX: DateDiff(timeinterval,date1,date2 [, firstdayofweek ][,
dHzcLn firstweekofyear>)
dHzcLn ARGUMENTS: timeinterval 表示相隔时间的类型，如“M“表示“月”。
dHzcLn EXAMPLE: <%
dHzcLn fromDate = #8/4/99#
dHzcLn toDate = #1/1/2000#
dHzcLn response.write "There are " & _
dHzcLn DateDiff("d",fromDate,toDate) & _
dHzcLn " days to millenium from 8/4/99."
dHzcLn %>
dHzcLn RESULT: 从8/4/99 到2000年还有 150 天.
dHzcLn
dHzcLn Day()
dHzcLn FUNCTION: 返回一个月的第几日 .
dHzcLn SYNTAX: Day(date)
dHzcLn ARGUMENTS: date 是任何有效的日期。
dHzcLn EXAMPLE: <%=Day(#8/4/99#)%>
dHzcLn RESULT: 4
dHzcLn
dHzcLn FormatCurrency()
dHzcLn FUNCTION: 返回表达式，此表达式已被格式化为货币值
dHzcLn SYNTAX: FormatCurrency(Expression [, Digit ][, LeadingDigit ][, Paren ][,
dHzcLn GroupDigit>>)
dHzcLn 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
dHzcLn 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
dHzcLn 零。
dHzcLn EXAMPLE: <%=FormatCurrency(34.3456)%>
dHzcLn RESULT: $34.35
dHzcLn
dHzcLn FormatDateTime()
dHzcLn FUNCTION: 返回表达式，此表达式已被格式化为日期或时间
dHzcLn SYNTAX: FormatDateTime(Date, [, NamedFormat])
dHzcLn ARGUMENTS: NamedFormat 指示所使用的日期/时间格式的数值，如果省略，则使用
dHzcLn vbGeneralDate.
dHzcLn EXAMPLE: <%=FormatDateTime("08/4/99", vbLongDate)%>
dHzcLn RESULT: Wednesday, August 04, 1999
dHzcLn
dHzcLn FormatNumber()
dHzcLn FUNCTION: 返回表达式，此表达式已被格式化为数值.
dHzcLn SYNTAX: FormatNumber(Expression [, Digit ][, LeadingDigit ][, Paren ][,
dHzcLn GroupDigit>>)
dHzcLn 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
dHzcLn 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 -
dHzcLn 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
dHzcLn 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
dHzcLn 的数值。默认值为 -1，指示使用的是计算机的区域设置。.
dHzcLn EXAMPLE: <%=FormatNumber(45.324567, 3)%>
dHzcLn RESULT: 45.325
dHzcLn
dHzcLn FormatPercent()
dHzcLn 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
dHzcLn 100 ）。 (%)
dHzcLn SYNTAX: FormatPercent(Expression [, Digit ][, LeadingDigit ][, Paren ][,
dHzcLn GroupDigit>>)
dHzcLn ARGUMENTS: 同上.
dHzcLn EXAMPLE: <%=FormatPercent(0.45267, 3)%>
dHzcLn RESULT: 45.267%
dHzcLn
dHzcLn Hour()
dHzcLn FUNCTION: 以24时返回小时数.
dHzcLn SYNTAX: Hour(time)
dHzcLn ARGUMENTS:
dHzcLn EXAMPLE: <%=Hour(#4:45:34 PM#)%>
dHzcLn RESULT: 16
dHzcLn (Hour has been converted to 24-hour system)
dHzcLn
dHzcLn Instr()
dHzcLn 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.
dHzcLn SYNTAX: Instr([start, ] strToBeSearched, strSearchFor [, compare])
dHzcLn ARGUMENTS: Start为搜索的起始值，strToBeSearched接受搜索的字符串
dHzcLn strSearchFor要搜索的字符.compare比较方式（详细见ASP常数）
dHzcLn EXAMPLE: <%
dHzcLn strText = "This is a test!!"
dHzcLn pos = Instr(strText, "a")
dHzcLn response.write pos
dHzcLn %>
dHzcLn RESULT: 9
dHzcLn
dHzcLn InstrRev()
dHzcLn FUNCTION: 同上，只是从字符串的最后一个搜索起
dHzcLn SYNTAX: InstrRev([start, ] strToBeSearched, strSearchFor [, compare])
dHzcLn ARGUMENTS: 同上.
dHzcLn EXAMPLE: <%
dHzcLn strText = "This is a test!!"
dHzcLn pos = InstrRev(strText, "s")
dHzcLn response.write pos
dHzcLn %>
dHzcLn RESULT: 13
dHzcLn
dHzcLn
dHzcLn Int()
dHzcLn FUNCTION: 返回数值类型,不四舍五入，注意取值是不大于它的整数。
dHzcLn SYNTAX: Int(number)
dHzcLn ARGUMENTS:
dHzcLn EXAMPLE: <%=INT(32.89)%> <%=int(-3.33)%>
dHzcLn RESULT: 32 -4
dHzcLn
dHzcLn IsArray()
dHzcLn FUNCTION: 判断一对象是否为数组，返回布尔值 .
dHzcLn SYNTAX: IsArray(name)
dHzcLn ARGUMENTS:
dHzcLn EXAMPLE: <%
dHzcLn strTest = "Test!"
dHzcLn response.write IsArray(strTest)
dHzcLn %>
dHzcLn RESULT: False
dHzcLn
dHzcLn IsDate()
dHzcLn FUNCTION: 判断一对象是否为日期，返回布尔值
dHzcLn SYNTAX: IsDate(expression)
dHzcLn ARGUMENTS: expression is any valid expression.
dHzcLn EXAMPLE: <%
dHzcLn strTest = "8/4/99"
dHzcLn response.write IsDate(strTest)
dHzcLn %>
dHzcLn RESULT: True
dHzcLn
dHzcLn IsEmpty()
dHzcLn FUNCTION: 判断一对象是否初始化，返回布尔值.
dHzcLn SYNTAX: IsEmpty(expression)
dHzcLn ARGUMENTS:
dHzcLn EXAMPLE: <%
dHzcLn Dim i
dHzcLn response.write IsEmpty(i)
dHzcLn %>
dHzcLn RESULT: True
dHzcLn
dHzcLn IsNull()
dHzcLn FUNCTION: 判断一对象是否为空，返回布尔值.
dHzcLn SYNTAX: IsNull(expression)
dHzcLn ARGUMENTS:
dHzcLn EXAMPLE: <%
dHzcLn Dim i
dHzcLn response.write IsNull(i)
dHzcLn %>
dHzcLn RESULT: False
dHzcLn
dHzcLn IsNumeric()
dHzcLn FUNCTION: 判断一对象是否为数字，返回布尔值.
dHzcLn SYNTAX: IsNumeric(expression)
dHzcLn ARGUMENTS:
dHzcLn EXAMPLE: <%
dHzcLn i = "345"
dHzcLn response.write IsNumeric(i)
dHzcLn %>
dHzcLn RESULT: True
dHzcLn 就算数字加了引号，ASP还是认为它是数字。
dHzcLn
dHzcLn IsObject()
dHzcLn FUNCTION: 判断一对象是否为对象，返回布尔值.
dHzcLn SYNTAX: IsObject(expression)
dHzcLn ARGUMENTS:
dHzcLn EXAMPLE: <%
dHzcLn Set con = Server.CreateObject("ADODB.Connection")
dHzcLn response.write IsObject(con)
dHzcLn %>
dHzcLn RESULT: True
dHzcLn
dHzcLn LBound()
dHzcLn FUNCTION: 返回指定数组维的最小可用下标.
dHzcLn SYNTAX: Lbound(arrayname [, dimension])
dHzcLn ARGUMENTS: ; dimension 指明要返回哪一维下界的整数。使用 1 表示第一维，2
dHzcLn 表示第二维，以此类推。如果省略 dimension 参数，默认值为 1.
dHzcLn EXAMPLE: <%
dHzcLn i = Array("Monday","Tuesday","Wednesday")
dHzcLn response.write LBound(i)
dHzcLn %>
dHzcLn RESULT: 0
dHzcLn
dHzcLn LCase()
dHzcLn FUNCTION: 返回字符串的小写形式
dHzcLn SYNTAX: Lcase(string)
dHzcLn ARGUMENTS: string is any valid string expression.
dHzcLn EXAMPLE: <%
dHzcLn strTest = "This is a test!"
dHzcLn response.write LCase(strTest)
dHzcLn %>
dHzcLn RESULT: this is a test!
dHzcLn
dHzcLn Left()
dHzcLn FUNCTION: 返回字符串左边第length个字符以前的字符（含第length个字符).
dHzcLn SYNTAX: Left(string, length)
dHzcLn ARGUMENTS:
dHzcLn EXAMPLE: <%
dHzcLn strTest = "This is a test!"
dHzcLn response.write Left(strTest, 3)
dHzcLn %>
dHzcLn RESULT: Thi
dHzcLn
dHzcLn Len()
dHzcLn FUNCTION: 返回字符串的长度.
dHzcLn SYNTAX: Len(string | varName)
dHzcLn ARGUMENTS:
dHzcLn EXAMPLE: <%
dHzcLn strTest = "This is a test!"
dHzcLn response.write Len(strTest)
dHzcLn %>
dHzcLn RESULT: 15
dHzcLn
dHzcLn LTrim()
dHzcLn FUNCTION: 去掉字符串左边的空格.
dHzcLn SYNTAX: LTrim(string)
dHzcLn ARGUMENTS:
dHzcLn EXAMPLE: <%
dHzcLn strTest = " This is a test!"
dHzcLn response.write LTrim(strTest)
dHzcLn %>
dHzcLn RESULT: This is a test!
dHzcLn
dHzcLn Mid()
dHzcLn FUNCTION: 返回特定长度的字符串(从start开始,长度为length).
dHzcLn SYNTAX: Mid(string, start [, length])
dHzcLn ARGUMENTS:
dHzcLn EXAMPLE: <%
dHzcLn strTest = "This is a test! Today is Monday."
dHzcLn response.write Mid(strTest, 17, 5)
dHzcLn %>
dHzcLn RESULT: Today
dHzcLn
dHzcLn Minute()
dHzcLn FUNCTION: 返回时间的分钏.
dHzcLn SYNTAX: Minute(time)
dHzcLn ARGUMENTS:
dHzcLn EXAMPLE: <%=Minute(#12:45:32 PM#)%>
dHzcLn RESULT: 45
dHzcLn
dHzcLn Month()
dHzcLn FUNCTION: 返回日期.
dHzcLn SYNTAX: Month(date)
dHzcLn ARGUMENTS: date is any valid date expression.
dHzcLn EXAMPLE: <%=Month(#08/04/99#)%>
dHzcLn RESULT: 8
dHzcLn
dHzcLn MonthName()
dHzcLn FUNCTION: Returns a string identifying the specified month.
dHzcLn SYNTAX: MonthName(month, [, Abb])
dHzcLn ARGUMENTS: month is the numeric representation for a given month; Abb
dHzcLn (optional) is a boolean ＆#118alue used to display month abbreviation. True
dHzcLn will display the abbreviated month name and False (default) will not show
dHzcLn the abbreviation.
dHzcLn EXAMPLE: <%=MonthName(Month(#08/04/99#))%>
dHzcLn RESULT: August
dHzcLn
dHzcLn Now()
dHzcLn FUNCTION: Returns the current system date and time.
dHzcLn SYNTAX: Now()
dHzcLn ARGUMENTS: None
dHzcLn EXAMPLE: <%=Now%>
dHzcLn RESULT: 8/4/99 9:30:16 AM
dHzcLn
dHzcLn Replace()
dHzcLn FUNCTION: Returns a string in which a specified sub-string has been
dHzcLn replaced with another substring a specified number of times.
dHzcLn SYNTAX: Replace(strToBeSearched, strSearchFor, strReplaceWith [, start
dHzcLn ][, count ][, compare>])
dHzcLn ARGUMENTS: strToBeSearched is a string expression containing a sub-
dHzcLn string to be replaced; strSearchFor is the string expression to search for
dHzcLn within strToBeSearched; strReplaceWith is the string expression to replace
dHzcLn sub-string strSearchFor; start (optional) is the numeric character
dHzcLn position to begin search; count (optional) is a ＆#118alue indicating the
dHzcLn comparision constant.
dHzcLn EXAMPLE: <%
dHzcLn strTest = "This is an apple!"
dHzcLn response.write Replace(strTest, "apple", "orange")
dHzcLn %>
dHzcLn RESULT: This is an orange!
dHzcLn
dHzcLn Right()
dHzcLn FUNCTION: 返回字符串右边第length个字符以前的字符（含第length个字符).
dHzcLn SYNTAX: Right(string, length)
dHzcLn ARGUMENTS: .
dHzcLn EXAMPLE: <%
dHzcLn strTest = "This is an test!"
dHzcLn response.write Right(strTest, 3)
dHzcLn %>
dHzcLn RESULT: st!
dHzcLn
dHzcLn Rnd()
dHzcLn FUNCTION: 产生一个随机数.
dHzcLn SYNTAX: Rnd [ (number) ]
dHzcLn ARGUMENTS:
dHzcLn EXAMPLE: <%
dHzcLn Randomize()
dHzcLn response.write RND()
dHzcLn %>
dHzcLn RESULT: 任何一个在0 到 1 之间的数
dHzcLn
dHzcLn Round()
dHzcLn FUNCTION: 返回按指定位数进行四舍五入的数值.
dHzcLn SYNTAX: Round(expression [, numRight])
dHzcLn 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
dHzcLn Round 函数返回整数.
dHzcLn EXAMPLE: <%
dHzcLn i = 32.45678
dHzcLn response.write Round(i)
dHzcLn %>
dHzcLn RESULT: 32
dHzcLn
dHzcLn Rtrim()
dHzcLn FUNCTION: 去掉字符串右边的字符串.
dHzcLn SYNTAX: Rtrim(string)
dHzcLn ARGUMENTS:
dHzcLn EXAMPLE: <%
dHzcLn strTest = "This is a test!! "
dHzcLn response.write RTrim(strTest)
dHzcLn %>
dHzcLn RESULT: This is a test!!
dHzcLn
dHzcLn Second()
dHzcLn FUNCTION: 返回秒.
dHzcLn SYNTAX: Second(time)
dHzcLn ARGUMENTS: .
dHzcLn EXAMPLE: <%=Second(#12:34:28 PM#)%>
dHzcLn RESULT: 28
dHzcLn
dHzcLn StrReverse()
dHzcLn FUNCTION: 反排一字符串
dHzcLn SYNTAX: StrReverse(string)
dHzcLn ARGUMENTS:
dHzcLn EXAMPLE: <%
dHzcLn strTest = "This is a test!!"
dHzcLn response.write StrReverse(strTest)
dHzcLn %>
dHzcLn RESULT: !!tset a si sihT
dHzcLn
dHzcLn Time()
dHzcLn FUNCTION: 返回系统时间.
dHzcLn SYNTAX: Time()
dHzcLn ARGUMENTS: .
dHzcLn EXAMPLE: <%=Time%>
dHzcLn RESULT: 9:58:28 AM
dHzcLn
dHzcLn Trim()
dHzcLn FUNCTION: 去掉字符串左右的空格.
dHzcLn SYNTAX: Trim(string)
dHzcLn ARGUMENTS: string is any valid string expression.
dHzcLn EXAMPLE: <%
dHzcLn strTest = " This is a test!! "
dHzcLn response.write Trim(strTest)
dHzcLn %>
dHzcLn RESULT: This is a test!!
dHzcLn
dHzcLn UBound()
dHzcLn FUNCTION: 返回指定数组维数的最大可用下标.
dHzcLn SYNTAX: Ubound(arrayname [, dimension])
dHzcLn ARGUMENTS: ; dimension (optional) 指定返回哪一维上界的整数。1 表示第一
dHzcLn 维，2 表示第二维，以此类推。如果省略 dimension 参数，则默认值为 1.
dHzcLn EXAMPLE: <%
dHzcLn i = Array("Monday","Tuesday","Wednesday")
dHzcLn response.write UBound(i)
dHzcLn %>
dHzcLn RESULT: 2
dHzcLn
dHzcLn UCase()
dHzcLn FUNCTION: 返回字符串的大写形式.
dHzcLn SYNTAX: UCase(string)
dHzcLn ARGUMENTS:
dHzcLn EXAMPLE: <%
dHzcLn strTest = "This is a test!!"
dHzcLn response.write UCase(strTest)
dHzcLn %>
dHzcLn RESULT: THIS IS A TEST!!
dHzcLn
dHzcLn VarType()
dHzcLn FUNCTION: 返回指示变量子类型的值
dHzcLn SYNTAX: VarType(varName)
dHzcLn ARGUMENTS:
dHzcLn EXAMPLE: <%
dHzcLn i = 3
dHzcLn response.write varType(i)
dHzcLn %>
dHzcLn RESULT: 2(数字)详见"asp常数"
dHzcLn
dHzcLn WeekDay()
dHzcLn FUNCTION: 返回在一周的第几天.
dHzcLn SYNTAX: WeekDay(date [, firstdayofweek])
dHzcLn ARGUMENTS: .
dHzcLn EXAMPLE: <%
dHzcLn d = #8/4/99#
dHzcLn response.write Weekday(d)
dHzcLn %>
dHzcLn RESULT: 4(星期三)
dHzcLn
dHzcLn WeekDayName()
dHzcLn FUNCTION: 返回一周第几天的名字.
dHzcLn SYNTAX: WeekDayName(weekday [, Abb ][, firstdayofweek>)
dHzcLn ARGUMENTS: Abb可选。Boolean 值，指明是否缩写表示星期各天的名称。如果省
dHzcLn 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
dHzcLn 数值
dHzcLn EXAMPLE: <%
dHzcLn d = #8/4/99#
dHzcLn response.write WeekdayName(Weekday(d))
dHzcLn %>
dHzcLn RESULT: Wednesday
dHzcLn
dHzcLn Year()
dHzcLn FUNCTION: 返回当前的年份.
dHzcLn SYNTAX: Year(date)
dHzcLn ARGUMENTS:
dHzcLn EXAMPLE: <%=Year(#8/4/99#)%>
dHzcLn RESULT: 199983501
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