CLASSIC ASP types

Date/Time Functions

Function	Description
CDate	Converts a valid date and time expression to the variant of subtype Date
Date	Returns the current system date
DateAdd	Returns a date to which a specified time interval has been added
DateDiff	Returns the number of intervals between two dates
DatePart	Returns the specified part of a given date
DateSerial	Returns the date for a specified year, month, and day
DateValue	Returns a date
Day	Returns a number that represents the day of the month (between 1 and 31, inclusive)
FormatDateTime	Returns an expression formatted as a date or time
Hour	Returns a number that represents the hour of the day (between 0 and 23, inclusive)
IsDate	Returns a Boolean value that indicates if the evaluated expression can be converted to a date
Minute	Returns a number that represents the minute of the hour (between 0 and 59, inclusive)
Month	Returns a number that represents the month of the year (between 1 and 12, inclusive)
MonthName	Returns the name of a specified month
Now	Returns the current system date and time
Second	Returns a number that represents the second of the minute (between 0 and 59, inclusive)
Time	Returns the current system time
Timer	Returns the number of seconds since 12:00 AM
TimeSerial	Returns the time for a specific hour, minute, and second
TimeValue	Returns a time
Weekday	Returns a number that represents the day of the week (between 1 and 7, inclusive)
WeekdayName	Returns the weekday name of a specified day of the week
Year	Returns a number that represents the year

Conversion Functions

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Function	Description
Asc	Converts the first letter in a string to ANSI code
CBool	Converts an expression to a variant of subtype Boolean
CByte	Converts an expression to a variant of subtype Byte
CCur	Converts an expression to a variant of subtype Currency
CDate	Converts a valid date and time expression to the variant of subtype Date
CDbl	Converts an expression to a variant of subtype Double
Chr	Converts the specified ANSI code to a character
CInt	Converts an expression to a variant of subtype Integer
CLng	Converts an expression to a variant of subtype Long
CSng	Converts an expression to a variant of subtype Single
CStr	Converts an expression to a variant of subtype String
Hex	Returns the hexadecimal value of a specified number
Oct	Returns the octal value of a specified number

Format Functions

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Function	Description
FormatCurrency	Returns an expression formatted as a currency value
FormatDateTime	Returns an expression formatted as a date or time
FormatNumber	Returns an expression formatted as a number
FormatPercent	Returns an expression formatted as a percentage

Math Functions

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Function	Description
Abs	Returns the absolute value of a specified number
Atn	Returns the arctangent of a specified number
Cos	Returns the cosine of a specified number (angle)
Exp	Returns e raised to a power
Hex	Returns the hexadecimal value of a specified number
Int	Returns the integer part of a specified number
Fix	Returns the integer part of a specified number
Log	Returns the natural logarithm of a specified number
Oct	Returns the octal value of a specified number
Rnd	Returns a random number less than 1 but greater or equal to 0
Sgn	Returns an integer that indicates the sign of a specified number
Sin	Returns the sine of a specified number (angle)
Sqr	Returns the square root of a specified number
Tan	Returns the tangent of a specified number (angle)

Array Functions

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Function	Description
Array	Returns a variant containing an array
Filter	Returns a zero-based array that contains a subset of a string array based on a filter criteria
IsArray	Returns a Boolean value that indicates whether a specified variable is an array
Join	Returns a string that consists of a number of substrings in an array
LBound	Returns the smallest subscript for the indicated dimension of an array
Split	Returns a zero-based, one-dimensional array that contains a specified number of substrings
UBound	Returns the largest subscript for the indicated dimension of an array

String Functions

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Function	Description
InStr	Returns the position of the first occurrence of one string within another. The search begins at the first character of the string
InStrRev	Returns the position of the first occurrence of one string within another. The search begins at the last character of the string
LCase	Converts a specified string to lowercase
Left	Returns a specified number of characters from the left side of a string
Len	Returns the number of characters in a string
LTrim	Removes spaces on the left side of a string
RTrim	Removes spaces on the right side of a string
Trim	Removes spaces on both the left and the right side of a string
Mid	Returns a specified number of characters from a string
Replace	Replaces a specified part of a string with another string a specified number of times
Right	Returns a specified number of characters from the right side of a string
Space	Returns a string that consists of a specified number of spaces
StrComp	Compares two strings and returns a value that represents the result of the comparison
String	Returns a string that contains a repeating character of a specified length
StrReverse	Reverses a string
UCase	Converts a specified string to uppercase

Other Functions

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Function	Description
CreateObject	Creates an object of a specified type
Eval	Evaluates an expression and returns the result
GetLocale	Returns the current locale ID
GetObject	Returns a reference to an automation object from a file
GetRef	Allows you to connect a VBScript procedure to a DHTML event on your pages
InputBox	Displays a dialog box, where the user can write some input and/or click on a button, and returns the contents
IsEmpty	Returns a Boolean value that indicates whether a specified variable has been initialized or not
IsNull	Returns a Boolean value that indicates whether a specified expression contains no valid data (Null)
IsNumeric	Returns a Boolean value that indicates whether a specified expression can be evaluated as a number
IsObject	Returns a Boolean value that indicates whether the specified expression is an automation object
LoadPicture	Returns a picture object. Available only on 32-bit platforms
MsgBox	Displays a message box, waits for the user to click a button, and returns a value that indicates which button the user clicked
RGB	Returns a number that represents an RGB color value
Round	Rounds a number
ScriptEngine	Returns the scripting language in use
ScriptEngineBuildVersion	Returns the build version number of the scripting engine in use
ScriptEngineMajorVersion	Returns the major version number of the scripting engine in use
ScriptEngineMinorVersion	Returns the minor version number of the scripting engine in use
SetLocale	Sets the locale ID and returns the previous locale ID
TypeName	Returns the subtype of a specified variable
VarType	Returns a value that indicates the subtype of a specified variable

Classic ASP - read/write files

The following VBScript example demonstrates how to open a file, write to it, and then read from it:

Sub ReadFiles
Dim fso, f1, ts, s
Const ForReading = 1
Set fso = CreateObject("Scripting.FileSystemObject")
Set f1 = fso.CreateTextFile("c:\testfile.txt", True)
' Write a line.
Response.Write "Writing file
"
f1.WriteLine "Hello World"
f1.WriteBlankLines(1)
f1.Close
' Read the contents of the file.
Response.Write "Reading file
"
Set ts = fso.OpenTextFile("c:\testfile.txt", ForReading)
s = ts.ReadLine
Response.Write "File contents = '" & s & "'"
ts.Close
End Sub



This code demonstrates the same in JScript:

function ReadFiles()
{
var fso, f1, ts, s;
var ForReading = 1;
fso = new ActiveXObject("Scripting.FileSystemObject");
f1 = fso.CreateTextFile("c:\\testfile.txt", true);
// Write a line.
Response.Write("Writing file
");
f1.WriteLine("Hello World");
f1.WriteBlankLines(1);
f1.Close();
// Read the contents of the file.
Response.Write("Reading file
");
ts = fso.OpenTextFile("c:\\testfile.txt", ForReading);
s = ts.ReadLine();
Response.Write("File contents = '" + s + "'");
ts.Close();
}



The following VBScript example creates a text file in the root directory of drive C, writes some information to it, moves it to a directory called \tmp, makes a copy of it in a directory called \temp, then deletes the copies from both directories.

To run the following example, create directories named \tmp and \temp in the root directory of drive C:

Sub ManipFiles
Dim fso, f1, f2, s
Set fso = CreateObject("Scripting.FileSystemObject")
Set f1 = fso.CreateTextFile("c:\testfile.txt", True)
Response.Write "Writing file
"
' Write a line.
f1.Write ("This is a test.")
' Close the file to writing.
f1.Close
Response.Write "Moving file to c:\tmp
"
' Get a handle to the file in root of C:\.
Set f2 = fso.GetFile("c:\testfile.txt")
' Move the file to \tmp directory.
f2.Move ("c:\tmp\testfile.txt")
Response.Write "Copying file to c:\temp
"
' Copy the file to \temp.
f2.Copy ("c:\temp\testfile.txt")
Response.Write "Deleting files
"
' Get handles to files' current location.
Set f2 = fso.GetFile("c:\tmp\testfile.txt")
Set f3 = fso.GetFile("c:\temp\testfile.txt")
' Delete the files.
f2.Delete
f3.Delete
Response.Write "All done!"
End Sub


This code shows the same in JScript:

function ManipFiles()
{
var fso, f1, f2, s;
fso = new ActiveXObject("Scripting.FileSystemObject");
f1 = fso.CreateTextFile("c:\\testfile.txt", true);
Response.Write("Writing file
");
// Write a line.
f1.Write("This is a test.");
// Close the file to writing.
f1.Close();
Response.Write("Moving file to c:\\tmp
");
// Get a handle to the file in root of C:\.
f2 = fso.GetFile("c:\\testfile.txt");
// Move the file to \tmp directory.
f2.Move ("c:\\tmp\\testfile.txt");
Response.Write("Copying file to c:\\temp
");
// Copy the file to \temp.
f2.Copy ("c:\\temp\\testfile.txt");
Response.Write("Deleting files
");
// Get handles to files' current location.
f2 = fso.GetFile("c:\\tmp\\testfile.txt");
f3 = fso.GetFile("c:\\temp\\testfile.txt");
// Delete the files.
f2.Delete();
f3.Delete();
Response.Write("All done!");
}