This topic tree describes the EPS.Data namespace.

Type	Description
AbortedSharedTransactionException	Exception used to indicate aborted shared transactions
ContextSharingRestrictionViolatedException	Occurs in scenarios where context sharing is required, but the contexts don't match
DataHelper	This static class provides methods that may be useful for data related tasks
DataService	Business objects use this class to connect to a data service. This is an abstract class that is not meant to be used directly. Instead, the DataServiceFactory class will instantiate a subclass of this class, depending on the actual configuration of the factory. Individual subclasses could connect to different data sources in different ways, such as a direct connection to SQL Server, or a connection to a web service, and the like.
DataServiceFactory	This class can be used to instantiate a DataService class. The class that will be instantiated depends on the current system configuration.
DataServiceInitiationEventArgs	Data service initiation event arguments
DataServiceInstantiationException	This exception fires whenever the factory fails to instantiate a data service object for an unknown reason. The original exception (if it exists) is exposed through the OriginalException property.
FacadeInstantiationException	This exception is thrown when the data service fails to instantiate a certain facade.
MissingDataConfigurationException	This exception gets raised when the data service tries to read configuration settings from the application's configuration file that wasn't there.
NonQueryEventArgs	Non-query event arguments
QueryEventArgs	Query event arguments
ScalarEventArgs	Scalar query event arguments
SharedDataContext	This class provides an abstraction of data connection information that is free of database semantics when used. This object can be used to associate multiple database operations with each other. For instance, it can be used to span transactions over multiple business objects, without exposing database functionality on the business object.
StoredProcedureFacade	Base class for a stored procedure facade
UnknownProcedureException	This exception is thrown by the stored procedure facade when it is asked to execute a simulated stored procedure that does not exist as a method on the facade.
UnsupportedCommandObjectException	This exception gets raised whenever a command object is passed to a method that expects a different command object. For instance, this could happen when a method that expects an SqlCommand object receives an OracleCommand object.
UnsupportedCommandTypeException	This exception is thrown whenever a command of the wrong type is executed. For instance, this exception may be thrown whenever a stored procedure facade is asked to execute a dynamic SQL statement.
UnsupportedProcessMethodException	This exception is thrown whenever a data service is asked to update/process a data source using a method that is not supported (such as trying to update a MySql database through stored procedures).
DataServiceInitiationEventHandler	used for the DataServiceInitiation event.
ExecuteNonQueryDelegate	used to invoke the ExecuteNonQuery method async
ExecuteQueryDelegate	used to invoke the ExecuteQuery method async
ExecuteScalarDelegate	used to invoke the ExecuteScalar method async
NonQueryEventHandler	used to define all sorts of scalar data query events
QueryEventHandler	used to define all sorts of data query events
ScalarEventHandler	used to define all sorts of scalar data query events
AllowedDataAccessMethod	Defines which data access methods are allowed in the current scenario. Example: If the allowed method is "StoredProcedures" and someone tries to execute an individual SELECT command, the data service will not execute the call.
ContextSharingRestriction	Defines what restrictions are to be applied when data contexts are shared.
DataRowProcessMethod	Defines how update commands are generated for a certain data source
DataRowUpdateMode	Defines what records to update on the database back end
DataServiceConnectionStatus	This enum defines the status of each data service. This information can be used to provide connection information to the user.
KeyType	Defines supported primary key types
TransactionStatus	What is the status of the current transaction?
IDataService	This interface represents the most basic incarnation of an EPS Data Service. It can be implemented at a low level, without having to subclass any of the abstract or solid data service classes in our framework.
IStoredProcedureFacade	Basic facade interface for a stored procedure facade
IStoredProcedureFacadeService	Service extension interface for data services that support a stored procedure facade