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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#)%> 返回类别: 教程 上一教程: ASP中SPLIT函数的实例 下一教程: 动态显示图片的函数(显示广告条) 您可以阅读与"ASP中的函数应用方式及应用举例(二)"相关的教程: · ASP中的函数应用方式及应用举例(一) · ASP应用中的应用函数 · asp中的一个希奇的函数 · ASP中几个有用的函数 · ACCESS数据库在ASP中的应用 |
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