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2001

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  • 1. Developing Web-based Database-Enabled Applications using Microsoft products 2001 ACE/NETC Conference Toronto, Canada Fred Rodriguez Texas Agricultural Extension Service
  • 2. Presentation Outline
    • Web-development Philosophy
    • Web-development Choices
    • Web-development System
    • Examples of Applications
    • Questions and Answers
  • 3. Web Development Philosophy
  • 4. Web Development Philosophy
    • WWW browser is a Universal Interface
    • Dynamic content has advantages over Static content
    • Object-Oriented development can cut costs
    • Server-side Scripting is a must
    • Databases can empower your site
  • 5. Web Development Philosophy (continued)
    • Production environment must be kept separate from the Development environment
  • 6. WWW Browser is a Universal Interface
    • The internet has become synonymous with computers and information
    • WWW browsers are freely available
    • WWW browsers are easy to use
    • WWW browsers are powerful
    • WWW browsers are the interface of choice
  • 7. Dynamic content has advantages over Static content
    • Easier to Maintain
      • Content and Presentation can be dealt with separately
      • Mass changes to content are easily made
      • Eliminate numerous HTML files that must be maintained
      • Easily add HTML functionality without re-writing any HTML
  • 8. Dynamic content has advantages over Static content (continued)
    • Keep one copy of Universal Information without having to “link” to it or “include” it on multiple pages
    • Enhanced Search Capabilities
      • Context-Sensitive Searches
      • Complex Searches
      • Multiple Site or Partial Site Searches
  • 9. Object-oriented development can cut costs
    • Classes of Objects can be dealt with as a whole
    • Objects can be shared and reused more easily than non-Objects
    • Use HTML Objects which have some characteristics of HTML operators, but they can have enhanced or controlled behaviour
  • 10. Server-side Scripting is a must
    • More reliable than Client Side Scripting
    • Does not create classes of users
    • Eliminates need for obtrusive techniques like cookies
    • Can implement security features easily
    • Can be a bottleneck
  • 11. Databases can empower your site
    • Better match for Dynamic Environment than a file-oriented system
    • More powerful and universal methodology than file-oriented system
    • Scales well
    • Economical
  • 12. Production environment must be kept separate from Development
    • Reliability key to application acceptance
    • Must have an environment to explore possibilities
    • Must have an environment to test new procedures and programs on
    • Testing should not impact production
  • 13. Web Development Choices
  • 14. Server Platform
    • Microsoft Windows NT/2000 Advanced Server (with Internet Information Server IIS)
      • Economical (Cost $250)
      • Easy to setup
      • Well-suited to Database and Applications
      • Active Server Pages make system powerful, easy to develop on, and very dynamic
      • Expandable (Clustering)
  • 15. Database
    • SQL Server 6.5 or 7.0
      • Economical (~$300)
      • Easy to setup and use and administer
      • Powerful (Transactions a must)
    • Access 97 or 2000
      • Economical (~$100)
      • Easy to setup and use and administer
  • 16. Visual Basic Scripting
    • Economical (free/part of Operating System)
    • Easy to learn and use
    • Powerful
    • Somewhat Object-Oriented
    • Unfortunately also proprietary
    • Already familiar with
  • 17. Web Development System DODADS Dynamic Object-oriented Database-driven Application Development System
  • 18. Dodads - Tables
    • Application Table
    • Screens Table
    • Screen Sections Table
    • HTML Objects Table
    • Server/Database/Table/Fields Tables
  • 19. Dodads - Application Table
    • Title/Logo
    • Server/Database/Tables Needed
    • Server/Database/Tables relationships
    • Security (if any)
    • Navigation between screens
    • Key Field
  • 20. Application Table Fields HA_Key: 19 HA_Name: Discuss HA_Title: Discuss/Chat Board HA_Logo_URL: http://multimedia.tamu.edu/images/logos/resources.gif HA_Security_Profile_XID: 1 HA_Background_Image_URL: HA_Background_Color: HA_Background_Music_URL:
  • 21. Application Table Fields - continued HA_Link_Color: HA_Visited_Link_Color: HA_Active_Link_Color: HA_Font_Face: HA_Font_Size: HA_Font_Color: HA_Status_XID: HA_Status_Message:
  • 22. Application Table Fields - continued HA_Default_First_Screen_XID: 54 HA_Subfunction_Screen_Map: Display,Menu,54,Display,Messages,51 HA_Sort_Field_Names: Chat_Date_Time DESC HA_Reports_Screen_Map: HA_Key_Field_Name: Resources/Development/Chats/Chat_Key HA_Criteria:
  • 23. Application Table Fields - continued HA_Selection_List_Fields_Line1: HA_Selection_List_Fields_Line2: HA_Selection_List_Fields_Line3: HA_Selection_List_Fields_Line4: HA_Selection_List_Fields_Line5: HA_Selection_Field_Names: HA_SDT_Future: 16|#|,Cannot ADD this Record|#|
  • 24. Application Table Fields - continued HA_SDT_Application: Resoururces/Development/Servers|#|,Resources/Development/Databases|#|,Resources/Development/Tables|#|,Resources/Development/Fields|#|,Resources/Development/Chats|#|,Resources/Development/Resources|#|,Resources/Development/Projects|#|,Resources/Development/Project_People_Roles|#|,Resources/Development/People|#| HA_SDT_System: Resources/Development/Servers|#|,Resources/Development/Databases|#|,Resources/Development/Tables|#|,Resources/Development/Fields|#|,Resources/Development/HTML_Applications|#|,Resources/Development/HTML_Screens|#|,Resources/Development/HTML_Screen_Sections|#|,Resources/Development/HTML_Objects|#|,Resources/Development/HTML_Screen_Images|#|,Resources/Development/Email_Requests|#| HA_SDT_Log_Transactions: HA_SDT_Deletions: HA_SDT_Relationships: Resources/Development/Chats/Chat_Resource_XID=Resources/Development/Resources/Resource_Key|#|,Resources/Development/Chats/Chat_Topic_XID=Resources/Development/Projects/Project_Key|#|,Resources/Development/Chats/Chat_Resource_XID=Resources/Development/People/People_Key|#|
  • 25. Screen Table Fields
    • Screen Number and Name
    • Screen Last Updated Date/Time
    • Screen Last Generated Date/Time
    • Screen Always Regenerate Flag
  • 26. Screen Section Table Fields
    • Screen Section Key/Name
    • Screen ID
    • Section ID
    • Sequence Number
    • Server/Database/Table
    • Criteria
  • 27. Screen Section Table Fields - continued
    • Database Start At
    • Database Read Records
    • Process Start At
    • Process Records
    • Repeat Loop
    • Conditional Existence
  • 28. HTML Object Fields
    • Object Key
    • Object Type (Rich set of Types)
    • Object Name
    • Object Value
    • Object Properties
    • Object Conditional Existence
  • 29. Server/Database/Table/Fields Fields
    • Server Name/Number
    • Database Name/Number
    • Table Name/Number
    • Field Name/Number/Properties
  • 30. Web Development Examples