How to create VDF Web Applications: Difference between revisions

How to create VDF Web Applications (view source)

Revision as of 16:41, 24 January 2009

411 bytes removed , 24 January 2009

m

→‎The overall idea

Jka

1,134

edits

@@ Line 15: / Line 15: @@
 = The overall idea  =
-When you develop ASP pages using vdf then you develop COM compents that run on the serverside and are 'glued' together using a scripting language like
+When you have decided to use ASP , then you should try to resist the urge to generate all the html from Visual DataFlex. There are some existing techniques in the web world that can save you time in the long run.
-*[http://en.wikipedia.org/wiki/VBScript vbscript]
+First of all you should understand that ASP is not a new programming language that you need to learn. VDF code can be exposed for asp via COM so that you can call the components via vbscript. ASP is about interfacing code to HTML in a easy way - so use it !
-*[http://en.wikipedia.org/wiki/JScript jscript] (jscript is microsofts version of [[Javascript]] )
-This means that '''asp itself should not be used as a programming language''' - it is a fast way of writing the html to go together with serverside components you develop in Visual DataFlex (VDF). The trick is that you can write lots of HTML in asp - outside your code. If you have problems you need to solve as a programmer, then the best idea is to try solve them in Visual DataFlex first , then expose the developed functionality as a web object embedded in your asp page.
+== Datamodel model using VDF on the server ==
-== VDF on the serverside ==
 *WBO
 *Global.asa (this is where your code is stackup up. check the list of WBP's there)
+== Styling using css =
+Cascading style sheets can be used to alter the appearance of your web page.
+*[http://www.quirksmode.org/css/contents.html quirksmode css]
+== Javascript on the client ==
-== Javascript and HTML on the clientside ==
 Now - after having being told that you really shouldn't be doing any clientside code when you are a vdf programmer, then here are some instructions for doing exactly that! (Note that you can accomplish a lot just by using the wizards in the AJAX library )
-=== Toolset for checking your clientside stuff ===
+== Validation
-You should always make sure that any html/javascript/css you do validates to the current standards. It will save you time in the long run.
-'''
 *[[HTML]] ( validate here: [http://validator.w3.org/]  )
 *[[CSS|Cascading Style Sheets]] ( validate here: http://jigsaw.w3.org/css-validator/ )
 *[[Javascript]] ( validate here: http://www.jslint.com/ )
-'''Advanced techniques'''
 *[http://www.quirksmode.org/js/contents.html quirksmode javacript ]
-*[http://www.quirksmode.org/css/contents.html quirksmode css]
 [[category: Web Programming]] [[Category:Stub]] [[Category:Cookbook]]