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")
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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.
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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".
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5. Date()
  FUNCTION: Returns the current system date.
  SYNTAX: Date()
  ARGUMENTS: None.
  EXAMPLE: <%=Date%>
  RESULT: 8/4/99
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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";
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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