非常有价值的“asp常用函数”.txt

非常有价值的“asp常用函数” 能够帮助你学习asp

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
 
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