OnDataBinding Method

HtmlSelect.OnDataBinding Method (EventArgs)

 

Raises the DataBinding event of an HtmlSelect control.

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

protected override void OnDataBinding(
	EventArgs e
)

Parameters

e
Type: System.EventArgs

A System.EventArgs that contains the event data.

Exception Condition
HttpException

The DataSourceID property is not of type IDataSource.

- or -

The DataSourceID property is not of type IHierarchicalDataSource.

InvalidOperationException

Both a DataSource and a DataSourceID property are defined for the HtmlSelect control.

- or -

The requested data view cannot be found.

ArgumentOutOfRangeException

The SelectedIndex property was set to a value greater than the number of items in the HtmlSelect control or less than -1.

The DataBinding event is raised when data is bound to the HtmlSelect control. This method notifies the control to perform any data-binding logic that is associated with it. Specifically, the OnDataBinding method creates the Items collection from the data source specified in either the DataSource property or the DataSourceID property.

Raising an event invokes the event handler through a delegate. For more information, see NIB: Raising an Event.

The OnDataBinding method also allows derived classes to handle the event without attaching a delegate. This is the preferred technique for handling the event in a derived class.

Notes to Inheritors:

When overriding the OnDataBinding method in a derived class, be sure to call the base class's OnDataBinding method so that registered delegates receive the event.

.NET Framework
Available since 1.1
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