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ObjectDataSource::Selecting Event

Occurs before a Select operation.

Namespace:  System.Web.UI.WebControls
Assembly:  System.Web (in System.Web.dll)

public:
 event ObjectDataSourceSelectingEventHandler^ Selecting {
	void add (ObjectDataSourceSelectingEventHandler^ value);
	void remove (ObjectDataSourceSelectingEventHandler^ value);
}
<asp:ObjectDataSource OnSelecting="ObjectDataSourceSelectingEventHandler" />

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.

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.

.NET Framework

Supported in: 4.5, 4, 3.5, 3.0, 2.0

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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