ObjectDataSourceSelectingEventArgs Class
Assembly: System.Web (in system.web.dll)
The ObjectDataSourceSelectingEventArgs class is used in the OnSelecting method. Because it is derived from the ObjectDataSourceMethodEventArgs class, the ObjectDataSourceSelectingEventArgs class provides access to input parameters for validation and manipulation through the InputParameters property. The ObjectDataSourceSelectingEventArgs class also provides the ExecutingSelectCount property, which is used to check whether the currently executing data retrieval operation is retrieving a row count, in addition to the data. This is important because when data source paging is enabled, the Selecting event is raised twice. For more information, see ExecutingSelectCount.
The ObjectDataSource control exposes many events that you can handle to work with the underlying business object at various times in its life cycle. The following table lists the events and associated EventArgs classes and event handler delegates.
| Event | EventArgs | EventHandler |
|---|---|---|
| Occurs immediately before the business object is instantiated. | ||
| Occurs immediately after the business object is instantiated. | ObjectDataSourceEventArgs | ObjectDataSourceObjectEventHandler |
| Selecting. Occurs before the data is retrieved. | ObjectDataSourceSelectingEventArgs | |
| Inserting, Updating, and Deleting. Occur before an insert, update, or delete operation is performed. | ObjectDataSourceMethodEventArgs | |
| Occurs after the data is retrieved. | ||
| Inserted, Updated, and Deleted. Occur after the insert, update, or delete operation is completed. | ObjectDataSourceStatusEventArgs | ObjectDataSourceStatusEventHandler |
| Occurs before a business object is destroyed. |
- AspNetHostingPermission for operating in a hosted environment. Demand value: LinkDemand; Permission value: Minimal.
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System.EventArgs
System.ComponentModel.CancelEventArgs
System.Web.UI.WebControls.ObjectDataSourceMethodEventArgs
System.Web.UI.WebControls.ObjectDataSourceSelectingEventArgs