ASP中的函数应用方法及应用举例(一)

　　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: <%
%>
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