VFP & Ajax
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This document provides an overview of AJAX (Asynchronous JavaScript and XML) and how it can be used with Visual FoxPro. It defines AJAX as a development technique that allows web applications to provide a desktop-like user experience. The document outlines the core AJAX technologies including HTML, CSS, DOM, XML, XMLHTTP, and JavaScript. It then discusses how these pieces can be combined and integrated with server-side technologies like Visual FoxPro to enable asynchronous communication and updating of web pages. Examples are provided around retrieving data and updating pages using AJAX calls from VFP. Resources for further learning about AJAX and related frameworks are also included.
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VFP & Ajax
- 1. VFP & AJAX Mike Feltman F1 Technologies
- 2. Agenda What is AJAX AJAX in 5 Minutes AJAX Technologies Talking AJAX to VFP Putting it Altogether AJAX Resources AJAX vs. Classic Web Apps
- 3. What is AJAX AJAX is not a technology, its an acronym for a collection of technologies. AJAX is a development technique that allows web apps to provide a desktop app like user experience AJAX = Asynchronous JavaScript + XML Also Referred to as Web 2.0 and RIA (Rich Internet Applications)
- 4. AJAX Technologies HTML & XHTML CSS DOM XML & XSLT XMLHTTP JavaScript
- 5. HTML lingua franca of the web HyperText Markup Language The Content Layer of a well designed website
- 6. XHTML eXtensible HyperText Markup Language HTML coded as well-formed XML Emerging, modernized HTML standard supported by most browsers
- 7. CSS Cascading Style Sheets Mechanism for adding style (fonts, colors, formatting, etc.) to web documents.
- 8. DOM Document Object Model Object model for documents, not specific to HTML, but rarely used outside of that context Supported by modern browsers
- 9. XML eXtensible Markup Language Standard data transport format for the web
- 10. XSLT Extensible Stylesheet Language Transformations Stylesheet Language for XML Formatting Language for XML data/documents
- 11. XMLHTTP Object that allows (asynchronous) communication with the server Native Object in Mozzila Browsers COM Object in Internet Exploder
- 12. JavaScript Client Side Scripting Language Supported by modern browsers Dynamically Typed Case Sensitive
- 13. Putting it altogether HTML/XHTML Content CSS Formatting DOM & JavaScript Client Side Code XML Data
- 14. The Missing Links Server Programming XML Enabled DBMS Language (SPL) VFP AFP, WebConnection, etc. SQL Server PHP MySQL XUL Oracle RUBY DB2 Java Classic ASP ASP.NET
- 15. AJAX Technologies Redux HTML & XHTML Server Programming CSS Language DOM DBMS XML & XSTL XMLHTTP JavaScript
- 16. Classic Web Application Model
- 17. Synchronous Web Application Model
- 18. AJAX Web Application Model
- 19. Asynchronous Web Application Model
- 20. Talking AJAX to VFP AFP (Active FoxPro Pages), Web Connection or any other VFP server-side scripting technology will suffice Can use classic ASP or ASP.NET but both go through COM with no benefit
- 21. VFP is the Ideal AJAX Server Language Fast Great Text Handling Native DBMS Great Connectivity Royalty Free Deployment
- 22. AJAX in 5 Minutes 1. Attach a JavaScript function call to an event on an HTML object 2. Get XMLHttp Request Object 3. Start an AJAX request 4. Respond to the request on completion 5. Update the web page
- 23. Talking AJAX to VFP 1. Retrieving Data & Updating the page a. From a command button b. From a textbox c. Using XML 2. Putting it all together with VFP business objects
- 24. Real World Ajax Glfc.net Airset.com http://script.aculo.us/ http://openrico.org/ http://dojotoolkit.org/ http://prototype.conio.net/
- 25. Conclusion AJAX can be used to provide desktop like user experiences AJAX is actually old technology, but its uses and usability are evolving rapidly VFP is well-suited for use in AJAX development
- 26. Resources Blogs/Websites Frameworks & Toolkits adaptivepath.com maxkiesler.com blogs.pathf.com/agileajax dojotoolkit.org ajax.phpmagazine.net prototype.conio.net ajaxpatterns.com script.aculo.us Books zk1.sourceforge.net The JavaScript Anthology rubyonrails.org Pragmatic AJAX
- 27. Thank You Please remember to fill out your evals