Table of Contents

UNIDAD JSCRIPT 1: ELEMENTOS BASICOS

TEMA JSCRIPT APENDICE1C: OBJETOS ASP

Response Object

Collections

Collection Description
Cookies Sets a cookie value. If the cookie does not exist, it will be created, and take the value that is specified

Properties

Property Description
Buffer Specifies whether to buffer the page output or not
CacheControl Sets whether a proxy server can cache the output generated by ASP or not
Charset Appends the name of a character-set to the content-type header in the Response object
ContentType Sets the HTTP content type for the Response object
Expires Sets how long (in minutes) a page will be cached on a browser before it expires
ExpiresAbsolute Sets a date and time when a page cached on a browser will expire
IsClientConnected Indicates if the client has disconnected from the server
Pics Appends a value to the PICS label response header
Status Specifies the value of the status line returned by the server

Methods

Method Description
AddHeader Adds a new HTTP header and a value to the HTTP response
AppendToLog Adds a string to the end of the server log entry
BinaryWrite Writes data directly to the output without any character conversion
Clear Clears any buffered HTML output
End Stops processing a script, and returns the current result
Flush Sends buffered HTML output immediately
Redirect Redirects the user to a different URL
Write Writes a specified string to the output

Request Object

Collections

Collection Description
ClientCertificate Contains all the field values stored in the client certificate
Cookies Contains all the cookie values sent in a HTTP request
Form Contains all the form (input) values from a form that uses the post method
QueryString Contains all the variable values in a HTTP query string
ServerVariables Contains all the server variable values

Properties

Property Description
TotalBytes Returns the total number of bytes the client sent in the body of the request

Methods

Method Description
BinaryRead Retrieves the data sent to the server from the client as part of a post request and stores it in a safe array

The FileSystemObject Object

The FileSystemObject object is used to access the file system on the server. This object can manipulate files, folders, and directory paths. It is also possible to retrieve file system information with this object.

The following code creates a text file (c:\test.txt) and then write some text to the file:

<%
dim fs,fname
set fs=Server.CreateObject(“Scripting.FileSystemObject”)
set fname=fs.CreateTextFile(“c:\test.txt”,true)
fname.WriteLine(“Hello World!”)
fname.Close
set fname=nothing
set fs=nothing
%>


The FileSystemObject object's properties and methods are described below:

Properties

Property Description
Drives Returns a collection of all Drive objects on the computer

Methods

Method Description
BuildPath Appends a name to an existing path
CopyFile Copies one or more files from one location to another
CopyFolder Copies one or more folders from one location to another
CreateFolder Creates a new folder
CreateTextFile Creates a text file and returns a TextStream object that can be used to read from, or write to the file
DeleteFile Deletes one or more specified files
DeleteFolder Deletes one or more specified folders
DriveExists Checks if a specified drive exists
FileExists Checks if a specified file exists
FolderExists Checks if a specified folder exists
GetAbsolutePathName Returns the complete path from the root of the drive for the specified path
GetBaseName Returns the base name of a specified file or folder
GetDrive Returns a Drive object corresponding to the drive in a specified path
GetDriveName Returns the drive name of a specified path
GetExtensionName Returns the file extension name for the last component in a specified path
GetFile Returns a File object for a specified path
GetFileName Returns the file name or folder name for the last component in a specified path
GetFolder Returns a Folder object for a specified path
GetParentFolderName Returns the name of the parent folder of the last component in a specified path
GetSpecialFolder Returns the path to some of Windows' special folders
GetTempName Returns a randomly generated temporary file or folder
MoveFile Moves one or more files from one location to another
MoveFolder Moves one or more folders from one location to another
OpenTextFile Opens a file and returns a TextStream object that can be used to access the file

The TextStream Object

The TextStream object is used to access the contents of a text-readable file.

The following code creates a text file (c:\test.txt) and then write some text to the file (the variable f is an instance of the TextStream object):


To create an instance of the TextStream object you can use the CreateTextFile or OpenTextFile methods of the FileSystemObject object, or you can use the OpenAsTextStream method of the File object.

The TextStream object's properties and methods are described below:

Properties

Property Description
AtEndOfLine Returns true if the file pointer is positioned immediately before the end-of-line marker in a TextStream file, and false if not
AtEndOfStream Returns true if the file pointer is at the end of a TextStream file, and false if not
Column Returns the column number of the current character position in an input stream
Line Returns the current line number in a TextStream file

Methods

Method Description
Close Closes an open TextStream file
Read Reads a specified number of characters from a TextStream file and returns the result
ReadAll Reads an entire TextStream file and returns the result
ReadLine Reads one line from a TextStream file and returns the result
Skip Skips a specified number of characters when reading a TextStream file
SkipLine Skips the next line when reading a TextStream file
Write Writes a specified text to a TextStream file
WriteLine Writes a specified text and a new-line character to a TextStream file
WriteBlankLines Writes a specified number of new-line character to a TextStream file

\\ The File Object

The File object is used to return information about a specified file.

To work with the properties and methods of the File object, you will have to create an instance of the File object through the FileSystemObject object. First; create a FileSystemObject object and then instantiate the File object through the GetFile method of the FileSystemObject object or through the Files property of the Folder object.

The following code uses the GetFile method of the FileSystemObject object to instantiate the File object and the DateCreated property to return the date when the specified file was created:

<%
 Dim fs,f
 Set fs=Server.CreateObject("Scripting.FileSystemObject")
 Set f=fs.GetFile("c:\test.txt")
 Response.Write("File created: " & f.DateCreated)
 set f=nothing
 set fs=nothing
 %>

Output: File created: 9/19/2001 10:01:19 AM


The File object's properties and methods are described below:

Properties

Property Description
Attributes Sets or returns the attributes of a specified file
DateCreated Returns the date and time when a specified file was created
DateLastAccessed Returns the date and time when a specified file was last accessed
DateLastModified Returns the date and time when a specified file was last modified
Drive Returns the drive letter of the drive where a specified file or folder resides
Name Sets or returns the name of a specified file
ParentFolder Returns the folder object for the parent of the specified file
Path Returns the path for a specified file
ShortName Returns the short name of a specified file (the 8.3 naming convention)
ShortPath Returns the short path of a specified file (the 8.3 naming convention)
Size Returns the size, in bytes, of a specified file
Type Returns the type of a specified file

Methods

Method Description
Copy Copies a specified file from one location to another
Delete Deletes a specified file
Move Moves a specified file from one location to another
OpenAsTextStream Opens a specified file and returns a TextStream object to access the file

The Folder Object

The Folder object is used to return information about a specified folder.

To work with the properties and methods of the Folder object, you will have to create an instance of the Folder object through the FileSystemObject object. First; create a FileSystemObject object and then instantiate the Folder object through the GetFolder method of the FileSystemObject object.

The following code uses the GetFolder method of the FileSystemObject object to instantiate the Folder object and the DateCreated property to return the date when the specified folder was created:

<%
 Dim fs,fo
 Set fs=Server.CreateObject("Scripting.FileSystemObject")
 Set fo=fs.GetFolder("c:\test")
 Response.Write("Folder created: " & fo.DateCreated)
 set fo=nothing
 set fs=nothing
 %>

Output: Folder created: 10/22/2001 10:01:19 AM

The Folder object's collections, properties and methods are described below:

Collections

Property Description
Files Returns a collection of all the files in a specified folder
SubFolders Returns a collection of all subfolders in a specified folder

Properties

Property Description
Attributes Sets or returns the attributes of a specified folder
DateCreated Returns the date and time when a specified folder was created
DateLastAccessed Returns the date and time when a specified folder was last accessed
DateLastModified Returns the date and time when a specified folder was last modified
Drive Returns the drive letter of the drive where the specified folder resides
IsRootFolder Returns true if a folder is the root folder and false if not
Name Sets or returns the name of a specified folder
ParentFolder Returns the parent folder of a specified folder
Path Returns the path for a specified folder
ShortName Returns the short name of a specified folder (the 8.3 naming convention)
ShortPath Returns the short path of a specified folder (the 8.3 naming convention)
Size Returns the size of a specified folder
Type Returns the type of a specified folder

Methods

Method Description
Copy Copies a specified folder from one location to another
Delete Deletes a specified folder
Move Moves a specified folder from one location to another
CreateTextFile Creates a new text file in the specified folder and returns a TextStream object to access the file
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