Occurs before a query is constructed and executed.
Assembly: System.Web.Entity (in System.Web.Entity.dll)
The event is raised before a query is constructed and executed. Handle the event to modify the configuration of the EntityDataSource or read or change the arguments from the data-bound control before the query is constructed and executed.
If AllowPaging is set to true in the data-bound control, the EntityDataSource invokes the Skip and Top query builder methods on ObjectQuery<T> using the values of the StartRowIndex and MaximumRows properties of the DataSourceSelectArguments object.
If AllowSorting is set to true in the data-bound control, the SortExpression of the DataSourceSelectArguments object can be changed when the event is handled. Any other query operators, such as WHERE or ORDER BY, that are specified in the page markup are applied after the event is raised.
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.