In this lesson you will change the GridView control's data source from a SqlDataSource control to an ObjectDataSource control. You will see how the current functionality supported by your custom data class affects the GridView's functionality.

1. Notice that the GridView control currently has an Edit column visible. Open the GridView Tasks menu and notice Enable Editing is checked.

2. For Choose Data Source select authorsObjectDataSource. When prompted to refresh Fields and Keys, click Yes.

Notice that the Enable Editing option and the Edit column are now missing. This is because your data layer class currently only exposes a method for retrieving data, not updating data. The design-time tools are able to analyze the object data source and tailor the functionality offered to you when creating a user interface.

3. Press ESC to close the GridView Tasks menu and then press F5 to run the application.

4. When the page loads select UT and verify that the GridView still works as expected.

5. Close the browser.

You have successfully changed your GridView control's data source to a data access tier object.