Objectives

This tutorial demonstrates how to selectively converting standard controls to use callback.

1. Converting standard controls to use callback.
   
   
   
   
2. Set UpdateMode properties to Custom.
   
   
   
   
3. Add selected controls that will be set to use callback. In this tutorial, add ddlMake and ddlModel.
   
   
   
   
4. Run the page. The controls in this page can be selectively set to use callback. Selecting a value from ddlMake will populate data in ddlModel without causing full page postback.
   
   
   
   
   Clicking the button to remove items between CheckBoxLists will cause full page postback.
   
   

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