| |
| DataDelta |
| |
| DataDelta is a handy VFP developer's
class. Use this class to figure out changes between
two sets of FoxPro data files. For example, suppose
you just completed a new version of your VFP application
and you want to document the changes. Unfortunately
you were so caught up with the programming you did
not write down all the changes you made to the tables.
Since it's been a couple of months since you started
the upgrade project, you have forgotten most of
the changes you made. What do you do now? One way
would be to compare the structure of each new table
with the structure of the corresponding original
table. But that would take too much time and you
might miss something. Instead, just run DataDelta
and it will automatically show you the differences: |
| |
 |
| |
| As shown in the example above,
DataDelta lists all the tables in both old and new
directories. The screen highlights tables that exist
only in new directory in yellow. It also highlights
tables that only exist in the old directory in gray.
A pink highlight means the owning dbf has changed.
No highlight means table exists in both old an new
folders. |
| |
| But that's not all. DataDelta
also tells you the differences between tables: Whether
fields were added, dropped, or modified. It evens
tells you if some table properties have changed. |
| |
| You can zoom in to see the
changes between two tables by right-clicking on
the table and selecting the appropriate choice from
the menu. Here is an example: |
| |
 |
| |
| The table view shows all the
fields of the table. The yellow highlight means
that field was added to the new table. A gray highlight
means the field was dropped. The pink highlight
means field was modified. When you select a field,
its properties are shown so you could see the differences. |
| |
