Represents the asynchronous callback method that a data-bound control supplies to a data source view for asynchronous data retrieval.
Assembly: System.Web (in System.Web.dll)
By default, ASP.NET Web page and control execution is synchronous. However, ASP.NET data source controls also support an asynchronous data retrieval pattern for data operations. None of the data source controls provided by ASP.NET version 2.0 are asynchronous, but a control developer can build a data source control that is asynchronous. The DataSourceView object supports the Select method for asynchronous data retrieval. The delegate is passed to the data source view by a data-bound control, so that the view can call this delegate when asynchronous processing is complete and deliver the data to the data-bound control.
Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2