Verifies that the data listing control requires data binding and that a valid data source control is specified before calling the DataBind method.
Assembly: System.Web (in System.Web.dll)
When you specify a value for the DataSourceID property, ASP.NET automatically binds the data listing control to the specified data source control. When ASP.NET performs data binding for the control, it calls the method first to verify that the control has not already been bound to data and that a valid data source control that implements the IDataSource interface is specified for its DataSourceID property. The method then calls the DataBind method.
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
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.