Overview of ASP Objects

1
Overview of ASP Objects

• MIS 3353 -- Web Site Development

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The Err Object

• Properties
• Number
• Description
• Source (place where error occurred)
• HelpFile
• Methods
• Clear
• Raise (generates an error)
• Note On Error Resume Next (helpful for
  debugging)

3
Scripting Objects Generally Available

• Dictionary (dynamic storage/retrieval)
• Hard drive info and manipulation
• FileSystemObject
• Drive/Drives
• Folder/Folders
• File/Files
• TextStream (create and read text files)
• ScriptEngine

4
Dictionary Object

• First, the process for all scripting objects
• Must call CreateObject method
• Argument is an object calling an object
• Scripting
• Dictionary (or FileSystemObject or . . . )
• Example
• Set var1 CreateObject(Scripting.Dictionary)

5
Dictionary Applications

• HTML form controls and their values
• txtPrice, 150
• btnSubmit, Click Me!
• Preference items
• bgcolor, maroon
• text, blue
• Creates collection
• Methods and properties Keys, Count, Item,
  Exists, Add

6
FileSystemObject

• Used to manipulate information about files,
  folders, drives, etc.
• Methods and properties Drive, Drives,
  DriveLetter, IsReady,
• Drives is a collection

7
Server Objects

• ActiveX objects
• Server
• Application
• Session
• Request (information from client browser)
• Response (information sent to client browser)
• Same, regardless of scripting language

8
Web Servers

• Microsoft
• IIS
• PWS
• Other Apache, . . . ?
• ASP needs Microsoft (or patches)
• Create server objects automatically

9
Basic Server Objects

• Request
• Form collection (methodPOST)
• QueryString collection (methodGET)
• Cookie collection
• Response