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Visual DataFlex vs Visual Basic - Visual DataFlex advantages Computers Articles | September 21 Derrick Henry Rush Jersey , 2007

Visual DataFlex is a RAD Visual database Studio designed to produce superior results in less than 12 the time of your current studio.


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Visual DataFlex (VDF)VDF?s main advantage is speed of development. On a system that deals with large quantities of data, VB will probably require twice the coding time.One example of this is in error handling. In VB error handling must be coded by hand.Another example of ?out of the box advantages? is the find messages of VDF. Coding ?find first or last? is completely supported and coded by VDF into augmentable methods available at both the object and datadictionary class levels.Overview: VDF is designed for data awareness in a completely scripted environment while VB is not designed as a data aware out of the box solution.Second, VDF is completely in harmony with your current code base and data.A conversion of DOS DataFlex to VDF can take your tried and true code and move it mostly intact into an OOPS VDF system dependably without reinventing the wheel.A conversion of DOS DataFlex to VDF also has the advantage of being run simultaneously with DOS. You can phase the system in gradually instead of being an all out conversion. You can even use the same data tables as DOS until the conversion is complete, and then switch over to client-server when VDF passes validation and takes over the complete role from DOS.VDF is a great front end for many databases: DataFlex, Pervasive Corey Davis Rush Jersey , MySQL, DB2, Oracle, and MS SQL Server for example. The same program code will work, no matter what database you choose (or switch to).VDF has a 30-year history as a development language designed for working with data. VB has data capability as an add-on. The first 2 versions of VB weren?t even database aware!VDF has a light footprint. Complex systems can run tolerably well on 5+ year old computers. VB.net requires ?power-user? type computers for all users to get reasonable performance.VDF is truly Object Oriented. This type of programming makes development faster Marcus Mariota Rush Jersey , cleaner, & more easily changed down the road. VB is ?Object Based? ? a partway implementation of the OOPs concept. One part of OOPs is ?Classes?. These allow flexible extension of the controls that are used to display data.· For example, suppose you want to color all fields that are indexed (& therefore can be used for finding). Add the code for doing this into the class, recompile & now every instance of every field that is indexed will be colored. In VB, this change could take weeks ? finding every control & adding the code to it.· Another major advantage to this process is centralized coding. If Amani Hooker Jersey , for instance, you wanted to change the color assigned to the indexed fields VDF can do this by changing one centralized spot, giving both great power to your code, and also making month-to-month maintenance chores a snap rather than a huge conversion job.VDF has Data Dictionaries. DD?s are arguably the most powerful part of VDF. All business rules & much of the custom code go here.· The advantage? As a very basic example, say you always want the Customer Name capitalized. Set this in the Customer DD. From then on Nate Davis Jersey , every view, dialog, etc. that uses the Customer DD will always capitalize the Customer Name.· Two years later, you decide to allow lower case. Go to the DD, change it there & then recompile the application. Every place that uses the Customer Name (doesn?t matter if it?s 1 place or 100) will now allow lower case.VDF?s Interconnected Data Dictionary Rule Base:In a VDF application A.J. Brown Jersey , the database table rules are coded [as above] with basic and advanced business rules. Example: The customer table has a globally applied rule that says the customer can?t go over their credit limit. When you combine the customer