Working with ClientDataSets

Last Updated: 7/28/2005

Sections below here:

• Debugging
• Form Management
• State Management
• Session Management
• Caching
• Layout Managers and Templates
• Javascript
• Custom Components
• Page Mode
• Ajax

Topics in this section:
Rethinking the User Interface
Writing your first Delphi App
Images and Graphics
Extending Intraweb
Working with COM
Working with ClientDataSets
Creating PDA Applications
Error Handling
Control Size
Reading and writing custom cookies
Miscellaneous
Advanced Development
Session Locking

This chapter refers only to IntraWeb for Delphi.

If you are using a ClientDataSet component and you get an Access Violation when exiting the application, you need to add the DBClient unit in the application uses clause before IWMain.

The reason for the access violation is that if DBClient is not included in project file uses clause, it's internal interfaces are freed before all sessions are closed and when IW closes it's sessions it will try to free ClientDataSet component, and you will get the access violation.

When DBClient is placed before IWMain IW will free sessions before DBClient interfaces are freed.

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