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VFP & the Web - How?
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General information
Forum:
Visual FoxPro
Category:
Internet applications
Miscellaneous
Thread ID:
00619709
Message ID:
00619827
Views:
19
>Yes, it possible and there is a lot of ways now.

>- more complicated and the best - using Web services
>- less complicated - using ASP technology
>- easiest way - using third-part software wor web developing
>Please check archive section - there are a lot of answer for your question in the articale section (UT has big collection of them).
>(we have chosen ASP technology, but now we want to use Web services)


Interesting way of quantitizing. I think a Web or Data Service implementation can potentially be the least complicated of porting an application. Also using ASP or third party tools may or may not be easy depending on the existing application as Travis points out it depends largely on the layout of the existing app in terms of business objects and relationships. In almost all cases I'd wager a full blown HTML conversion will take much longer than Web enabling an existing application especially if the developers are not fluent with Web technology in the first place.

The biggest problem with Web/Data Services is the initial conceptual hurdle to think of the data as nothing more than a data service...

Through Web or data services it might be possible to pull all data off the Web and use it locally without having to completely re-write everything. Just as an example, of this type of technology you can use remote data services and then tie those to existing business objects which in many cases may mean very few or no changes at all to data access mechanisms.

I've built something like this into Web Connection with very minimal code - a client and local SQL broker that passes SQL to the server for processing and returning data all via a simple XML service that deals with all the different data modes of returning data, result codes and errors. THis data service then is wrappered into my business object class, which now can call local data and Web data with the switch of a property without code changes (assuming the actual data backend stays the same - although you can switch between Fox, SQL, Oracle in the same manner given the SQL syntax is consistent).

You can actually check this type of thing out in a simple demo:
http://www.west-wind.com/wconnect/wwhttpdemo.app
(the wwBusiness and the HTTP SQL demos)

Although this is part of Web Connection it can be applied to just about any bus object framework with minimal overhead and on the server side this same sort of thing works with ASP (through VFP COM).

+++ RIck ---
+++ Rick ---

West Wind Technologies
Maui, Hawaii

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