Gets an IEnumerable object that represents the data source that is bound to the System.Web.UI.HtmlControls.HtmlSelect control.
An IEnumerable object. If no data source is specified, a default value of null is returned.
The HtmlSelect.GetData method returns an IEnumerable object independent of whether the data source was specified by the HtmlSelect.DataSource property or the HtmlSelect.DataSourceID property.