Assembly: System.Web (in system.web.dll)
/** @event */ public void add_Selecting (ObjectDataSourceSelectingEventHandler value) /** @event */ public void remove_Selecting (ObjectDataSourceSelectingEventHandler value)
In JScript, you can handle the events defined by a class, but you cannot define your own.
Handle the Selecting event to perform additional initialization that is specific to your application, to validate the values of parameters, or to change the parameter values before the ObjectDataSource control performs the data retrieval operation. The parameters are available as an IDictionary collection that is accessed by the InputParameters property, which is exposed by the ObjectDataSourceMethodEventArgs object.
If you are not familiar with the Data Access features in ASP.NET 2.0, you should read some of these topics before continuing:
This event can be fired twice for a single call to the Select method, if the SelectCountMethod property is set. The ExecutingSelectCount property of the ObjectDataSourceSelectingEventArgs object is used to determine if select was called to retrieve data or retrieve the count.
For more information about handling events, see Consuming Events.
Other ResourcesASP.NET Data Access Overview
Data Source Web Server Controls
ObjectDataSource Control Overview
Creating an ObjectDataSource Control Source Object