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Visual Dataflex Product Review

Author: Peter A Donovan



Visual DataFlex is a database RAD (Rapid Application Development) visual studio where windows and web database applications can be designed.





~The best kept secret in database development~





This article is meant for viewing by mid-size and small companies seeking a lower cost or more rapid alternative to Microsoft platforms such as .NET and VB.





================= Here's the Index For This Article: ===============





* Where did Visual DataFlex Originate?





* What advantages does it have over .NET and VB?





* Why should I try Visual DataFlex (download eval)?





* Who makes Visual DataFlex?





* What support would I receive from Newsgroups Or Support Groups?





* What's the future of Visual DataFlex?





=====================================================================





* Where did Visual DataFlex Originate?





--------------------------------------





In 1981 Blaine Gabbert Titans Jersey , along with DBASE2, FOXPRO, etc. DATAFLEX (the dos version) launched it's 2.3 version for DOS, CPM Dion Lewis Titans Jersey , and UNIX.





Because it was the highest price database engine and development platform, and it's specs outweighed the competition many individuals who were not





programmers purchased DATAFLEX and with it's english like syntax became faithful followers and many success stories were launched. If you were an





accountant, sales manager, or inventory analyst Malcolm Butler Titans Jersey , DATAFLEX was perfect since it was a 4GL product and handled the interface with the database included in the





package automatically for you, and a winning combination of work skills and easy database development combined to make v2.3 a highly successful endeavor.





The packages written in this era were from experts in the field and while many unorthodox methodology was employed, it worked! Unfortunately, like many





other (now) Legacy Systems written for DOS became more and more difficult to deploy and maintain since Windows was introduced. There are many DOS DATAFLEX





applications still fueling businesses across the world now and most are considering: port to Visual DataFlex Brynden Trawick Titans Jersey , or port to the Web? The main concern of many





companies is that unique and proven code which runs like lightning would be compromised by eithe of these solutions, and is generally a real concern: but of





significantly less importance than the users perceive.





* What advantages does it have over .NET and VB?





------------------------------------------------





Imagine you are a designer of software, and a .NET solution from Microsoft is available. First, you start with the user interface Harold Landry Titans Jersey , and the tools to produce





an interface in windowsweb are highly attractive. Then, you have the job of writing an interface to the data which is a huge undertaking and requires





thousands of lines of code to produce a stable application that follows the specs of database table business rules, connections between database tables





(dependencies, etc).





Now Rashaan Evans Titans Jersey , Imagine you are a Visual DataFlex designer. First, you start by subclassing the controls provided by Data Access Worldwide (true windows controls) and





leave these subclasses (based on your business name for instance) completely alone and unchanged.... but for future use. Then, you open the database builder





which creates datadictionaries for each and every database table in your project, relate the database rules to each other (auto-generated) and determine how





each column of each table will appear Delanie Walker Titans Jersey , which validation will apply to it, and set your business rules directly in the CLASS for the table.





See how the two approaches are completely the opposite?





Visual DataFlex centralizes on data validation, finding, clearing Marcus Mariota Titans Jersey , deleting, and saving, and then you use the Visual Studio to create the visual portion of





the program which is built on a TREE of connected data dictionary objects (instantiated business rule layers based on the classes) which can introduce





business rule exceptions and augmentation.





The advantages appear immediately:





1, Data Integrity and business rule layers intertwine and you MUST validate the data (automatically generated validation based on your rules) and synchronize





together in order to save a record or records.





2. The visual designer has the same classes for the most part as

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