DevExpress.Xpo.Exceptions Namespace

Contains classes that describe exceptions which may occur when working with data in XPO.

Assembly: DevExpress.Xpo.v24.2.dll

Classes

Name	Description
AssociationElementTypeMissingException	An exception that is thrown when the elementType parameter is not specified in the AssociationAttribute attribute.
AssociationInvalidException	An exception that is thrown when a persistent property marked with the AssociationAttribute attribute cannot be used to create a relation.
CannotChangePropertyWhenSessionIsConnectedException	An exception that is thrown when the essential properties of the currently connected session are about to be modified.
CannotFindAppropriateConnectionProviderException	Occurs when a connection string or an IDbConnection object is not compatible with data store providers.
CannotLoadInvalidTypeException	An exception that is thrown when a persistent object cannot be loaded because it’s type is not valid.
CannotLoadObjectsException	An exception that is thrown when attempting to reload an object that is not present in a persistent data store.
CannotResolveClassInfoException	An exception that is thrown when the XPDictionary cannot provide XPClassInfo metadata information for the class.
DifferentObjectsWithSameKeyException	An exception that is thrown when two objects within the current session have the same key.
DuplicateKeyPropertyException	An exception that is thrown when a persistent object has two or more key properties.
KeyPropertyAbsentException	An exception that is thrown when a persistent object doesn’t have a key.
KeysAutogenerationNonSupportedTypeException	An exception that is thrown when a key field doesn’t support automatic value generation
NonPersistentReferenceFoundException	An exception that is thrown when a persistent reference to a non-persistent class exists.
ObjectCacheException	An exception that is thrown when a severe internal error occurs.
PropertyMissingException	An exception that is thrown when an invalid property name is specified.
RequiredAttributeMissingException	An exception that is thrown when an attribute with the specified name cannot be found for a specific property.
SameTableNameException	An exception that is thrown when two persistent classes are mapped to the same table.
SessionCtorAbsentException	An exception that is thrown when a persistent class doesn’t have a constructor with a Session parameter.
SessionMixingException	An exception that is thrown when a persistent object that belongs to a specific session is used within another session or refers to an object from another session.
TransactionSequenceException	An exception that is thrown when the sequence of the BeginTransaction, CommitTransaction and RollbackTransaction methods is incorrect.
TypeFieldIsEmptyException	An exception that is thrown when an internal error occurs.
TypeNotFoundException	An exception that is thrown when an object in storage refers to a type that cannot be found.
UnableToFillRefTypeException	An exception that is thrown when an error occurs when building the tree structure of classes.
XMLDictionaryException	An exception that is thrown when an error occurs whilst object metadata is being loaded from an XML file.