ASP中的函数应用方法及应用举例(一)
2011-7-25编辑:mal
1.Array()
FUNCTION: Returns a variant containing an array.
SYNTAX: Array(list)
ARGUMENTS: list is a comma-delimited list of values to add to the array.
EXAMPLE: <%
Dim myArray()
For i = 1 to 7
Redim Preserve myArray(i)
myArray(i) = WeekdayName(i)
Next
%>
RESULT: Creates an Array contains 7 elements:
myArray("Sunday","Monday", ... ... "Saturday")
-------------------------------------
2. CInt()
FUNCTION: Returns an expression that has been converted to an Interget subtype.
SYNTAX: CInt(expression)
ARGUMENTS: expression is any valid expression
EXAMPLE: <%
f = "234"
response.write cINT(f) + 2
%>
RESULT: 236
Converts string "234" to mathematic value 234.
If f is empty (un-initialized variable), cINT() returns 0.
-------------------------------------
3. CreateObject()
FUNCTION: Creates and returns a reference to ActiveX automation object.
SYNTAX: CreateObject(objName)
ARGUMENTS: objName is any valid ActiveX automation object.
EXAMPLE: <%
Set con = Server.CreateObject("ADODB.Connection")
%>
RESULT:
-------------------------------------
4. CStr()
FUNCTION: Returns an expression that has been converted to a variant of subtype String.
SYNTAX: CStr(expression)
ARGUMENTS: expression is any valid expression
EXAMPLE: <%
s = 3 + 2
response.write "The result is: " & cStr(s)
%>
RESULT: Converts a mathematic value 5 to a string "5".
-------------------------------------
5. Date()
FUNCTION: Returns the current system date.
SYNTAX: Date()
ARGUMENTS: None.
EXAMPLE: <%=Date%>
RESULT: 8/4/99
-------------------------------------
6. DateAdd()
FUNCTION: Returns a date to which a specific time interval has been added.
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";
-------------------------------------
7. DateDiff()
FUNCTION: Returns the number of intervals between two dates.
SYNTAX: DateDiff(timeinterval,date1,date2 [, firstdayofweek [, firstweekofyear]])
ARGUMENTS: timeinterval is the time interval to add; date is a valid date expression; firstdayofweek and
firstweekofyear are optional values to specify the first day of the week and first week of year.
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: There are 150 days to millenium from 8/4/99.
-------------------------------------
8. Day()
FUNCTION: Returns a whole number representing the day of the month.
SYNTAX: Day(date