xpo-devexpress-dot-xpo-7d2c3511.md
Contains classes that describe exceptions which may occur when working with data in XPO.
Assembly : DevExpress.Xpo.v25.2.dll
NuGet Package : DevExpress.Xpo
| 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. |