ASP中的函数应用方法及应用举例二 -pc6资讯

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ASP中的函数应用方法及应用举例二 时间：2004/10/7 19:18:00来源：本站整理作者：蓝点我要评论(0): 21. IsObject()

  FUNCTION: Returns a boolean value indicating whether an expression refers to an automation object.

  SYNTAX: IsObject(expression)

  ARGUMENTS: expression is any valid expression.

  EXAMPLE: <%

Set con = Server.CreateObject("ADODB.Connection")

response.write IsObject(con)

%>

  RESULT: True

-------------------------------------



22. LBound()

  FUNCTION: Returns the base index value for a dimension of any array.

  SYNTAX: Lbound(arrayname [, dimension])

  ARGUMENTS: arrayname is the name of any array; dimension is an optional number indicating the dimension

to find the lower bound.

  EXAMPLE: <%

i = Array("Monday","Tuesday","Wednesday")

response.write LBound(i)

%>

  RESULT: 0

-------------------------------------



23. LCase()

  FUNCTION: Returns a string that has been converted into lowercase characters.

  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!

-------------------------------------



24. Left()

  FUNCTION: Returns the number of characters from the left side of a string.

  SYNTAX: Left(string, length)

  ARGUMENTS: string is any valid string expression; length is the length of characters to return.

  EXAMPLE: <%

strTest = "This is a test!"

response.write Left(strTest, 3)

%>

  RESULT: Thi

-------------------------------------



25. Len()

  FUNCTION: Returns the number of characters in a string or the number of bytes required to store a

variable.

  SYNTAX: Len(string | varName)

  ARGUMENTS: string is any valid string expression; varName is any valid variable name.

  EXAMPLE: <%

strTest = "This is a test!"

response.write Len(strTest)

%>

  RESULT: 15

(The total length of strTest is 15 characters)

26.

LTrim()

  FUNCTION: Returns a string without leading spaces.

  SYNTAX: LTrim(string)

  ARGUMENTS: string is any valid string expression.

  EXAMPLE: <%

strTest = " This is a test!"

response.write LTrim(strTest)

%>

  RESULT: This is a test!

-------------------------------------



27. Mid()

  FUNCTION: Returns a specified number of characters from a string.

  SYNTAX: Mid(string, start [, length])

  ARGUMENTS: string is any valid string expression; start is a numeric character position to begin

extraction from; length (optional) is the number of characters to return.

  EXAMPLE: <%

strTest = "This is a test! Today is Monday."

response.write Mid(strTest, 17, 5)

%>

  RESULT: Today

-------------------------------------



28. Minute()

  FUNCTION: Returns the number of the minutes in current system time.

  SYNTAX: Minute(time)

  ARGUMENTS: time is any valid time expression.

  EXAMPLE: <%=Minute(#12:45:32 PM#)%>

  RESULT: 45

-------------------------------------



29. Month()

  FUNCTION: Returns the number of the month of the year.

  SYNTAX: Month(date)

  ARGUMENTS: date is any valid date expression.

  EXAMPLE: <%=Month(#08/04/99#)%>

  RESULT: 8

-------------------------------------



30. 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

-------------------------------------



31. Now()

  FUNCTION: Returns the current system date and time.

  SYNTAX: Now()

  ARGUMENTS: None

  EXAMPLE: <%=Now%>

  RESULT: 8/4/99 9:30:16 AM

-------------------------------------



32. 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!

-------------------------------------



33. Right()

  FUNCTION: Returns a specified number of characters from the right side of a string.

  SYNTAX: Right(string, length)

  ARGUMENTS: string is any valid string expression; length is any valid numeric expression representing

the number of characters to return.

  EXAMPLE: <%

strTest = "This is an test!"

response.write Right(strTest, 3)

%>

  RESULT: st!

-------------------------------------



34. Rnd()

  FUNCTION: Returns a random number.

  SYNTAX: Rnd [ (number) ]

  ARGUMENTS: number is any valid numeric expression.

  EXAMPLE: <%

Randomize()

response.write RND()

%>

  RESULT: Any number between 0 and 1

(Without Randomize(), the number will not re-generate)



Round()

  FUNCTION: Returns a number rounded to a specified number of decimal places.

  SYNTAX: Round(expression [, numRight])

  ARGUMENTS: expression is any valid numeric expression to be rounded; numRight (optional) is any numeric

expression used to indicate the number of digits to the right of the decimal point.

  EXAMPLE: <%

i = 32.45678

response.write Round(i)

%>

  RESULT: 32

-------------------------------------



35. Rtrim()

  FUNCTION: Returns a copy of a string without trailing spaces.

  SYNTAX: Rtrim(string)

  ARGUMENTS: string is any valid string expression.

  EXAMPLE: <%

strTest = "This is a test!! "

response.write RTrim(strTest)

%>

  RESULT: This is a test!!

-------------------------------------



36. Second()

  FUNCTION: Returns the current seconds value of the current system time.

  SYNTAX: Second(time)

  ARGUMENTS: time is any valid time expression.

  EXAMPLE: <%=Second(#12:34:28 PM#)%>

  RESULT: 28

-------------------------------------



37. StrReverse()

  FUNCTION: Returns a string where the character order has been reversed

  SYNTAX: StrReverse(string)

  ARGUMENTS: string is any valid string expression

  EXAMPLE: <%

strTest = "This is a test!!"

response.write StrReverse(strTest)

%>

  RESULT: !!tset a si sihT

-------------------------------------



38. Time()

  FUNCTION: Returns the current system time.

  SYNTAX: Time()

  ARGUMENTS: None.

  EXAMPLE: <%=Time%>

  RESULT: 9:58:28 AM

-------------------------------------



39. Trim()

  FUNCTION: Returns a string without leading and trailing spaces.

  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!!

-------------------------------------



40. UBound()

  FUNCTION: Returns the largest available subscipt for a dimension of an array.

  SYNTAX: Ubound(arrayname [, dimension])

  ARGUMENTS: arrayname is the name of a valid array; dimension (optional) is a number indicating the

dimension to find the upper bound.

  EXAMPLE: <%

i = Array("Monday","Tuesday","Wednesday")

response.write UBound(i)

%>

  RESULT: 2

(array index starts with 0)

-------------------------------------



41. UCase()

  FUNCTION: Returns a string that has been converted to uppercase characters.

  SYNTAX: UCase(string)

  ARGUMENTS: string is any valid string expression.

  EXAMPLE: <%

strTest = "This is a test!!"

response.write UCase(strTest)

%>

  RESULT: THIS IS A TEST!!

-------------------------------------



42. VarType()

  FUNCTION: Returns the subtype of a variable

  SYNTAX: VarType(varName)

  ARGUMENTS: varName is the required variable name

  EXAMPLE: <%

i = 3

response.write varType(i)

%>

  RESULT: 2

(2 indicates Integer. Refers to ASP Constants)

-------------------------------------



43. WeekDay()

  FUNCTION: Returns a whole number representing the day of the week.

  SYNTAX: WeekDay(date [, firstdayofweek])

  ARGUMENTS: date is any valid date expression; firstdayofweek is an optional date constant to assign the

first day of week.

  EXAMPLE: <%

d = #8/4/99#

response.write Weekday(d)

%>

  RESULT: 4

(4 indicates the fourth of the week, which is Wednesday)

-------------------------------------



44. WeekDayName()

  FUNCTION: Returns the specified day of the week.

  SYNTAX: WeekDayName(weekday [, Abb [, firstdayofweek]])

  ARGUMENTS: weekday is the numeric representation for the day of the week; Abb is an optional boolean

value (if set to true, the weekday name will be abbreviated; if set to false, the full weekday name is

displayed); and firstdayofweek is an optional date constant to assign the first day of week.

  EXAMPLE: <%

d = #8/4/99#

response.write WeekdayName(Weekday(d))

%>

  RESULT: Wednesday

-------------------------------------



45. Year()

  FUNCTION: Returns the current year.

  SYNTAX: Year(date)

  ARGUMENTS: date is any valid date expression.

  EXAMPLE: <%=Year(#8/4/99#)%>

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