1. Visual Extend CursorAdapter
VFX 18 E
Visual Extend CursorAdapter
German FoxPro User Group
Venelina Jordanova

2. CursorAdapter? Class overview „Normal“ Cursor at run-time
Properties
Methods
Inheritance
„Normal“ Cursor at run-time
Saving data with Tableupdate()

3. Advantages of CursorAdapter
Chance to change the data source at run-time
Data types conversion
DBC disadvantages
Connection information is accesible from DBC container
Can be manipulated

4. Data access conception
CBaseDataAccess class (Vfxctrl.vcx) functionality
Connection-Manager
Programmatic class cconnectionmgr in Vfxfunc.prg
Datasource can be changed at run-time
Config.vfx - encrypted!

5. Planing a new application
Use CusorAdapter class only!
Based on cBaseDataAccess class
Advantages:
Only one connection will be used
Changeable datasource
Easy to upsize from DBC to SQL
Customers can decide about using DBC or SQL

6. MSDE and SQL Server Why to use SQL Server?
Scalability
Security
Maintainability
MSDE does not contain administrative tools
-> VFP Data Explorer

7. VFP Data Explorer Review and edit the database content DBC
SQL Server/MSDE

8. VFX – Upsizing Wizard
Choose the local database to be upsized to SQL Server
Select the destination database server, where to store the upsized database
SQL Server (all versions)
Oracle
Name of remote database
Tables selection
Options
Finish!

9. VFX - CursorAdapter Wizard
Creates a CursorAdapter class for every table in the selected database
DBC
DSN
ConnectionString
Select the source database
Select base class and classlibrary
Generating the CursorAdapter classes

10. Manage Config.vfx Establish the data access for VFX-Application
In the IDE
At customer side
Edit the encrypted file
Password is kept in goProgram.cConfigPassword
VFXPath.dbf compatible

11. Thank you!
In next video you will see how to create a form using a CursorAdapter as data source
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