TBytesField class
Field class for fixed size byte array values.
Declaration
TBytesField = class(TBinaryField)Inheritance
Descends from it: TVarBytesField
Description
TBytesField is the class used when a dataset must manage data of fixed-size binary type. (
DataType equals
ftBytes).
It initializes some of the properties of the
TField class to be able to work with fixed-size byte fields.
It should never be necessary to create an instance of TBytesField manually, a field
of this class will be instantiated automatically for each binary data field when a dataset is opened.
See also
Methods
GetDataSize | protected | |
Create | public | Create a new instance of a TBytesField class. |
Inherited
From TBinaryField (13)
CheckTypeSize GetAsAnsiString GetAsBytes GetAsString GetAsUnicodeString GetAsVariant GetValue SetAsAnsiString SetAsBytes SetAsString SetAsUnicodeString SetVarValue Size
From TField (133)
AccessError Alignment AsAnsiString AsBCD AsBoolean AsBytes AsCurrency AsDateTime AsExtended AsFloat AsInteger AsLargeInt AsLongint AsLongWord Assign AssignValue AsSingle AsString AsUnicodeString AsUTF8String AsVariant AsWideString AttributeSet Bind Calculated CanModify Change CheckInactive Clear ConstraintErrorMessage CurValue CustomConstraint DataChanged DataSet DataSize DataType DefaultExpression Destroy DisplayLabel DisplayName DisplayText DisplayWidth EditMask EditMaskPtr FieldDef FieldKind FieldName FieldNo FocusControl FreeBuffers GetAsBCD GetAsBoolean GetAsCurrency GetAsDateTime GetAsExtended GetAsFloat GetAsInteger GetAsLargeInt GetAsLongint GetAsLongWord GetAsSingle GetAsUTF8String GetAsWideString GetCanModify GetClassDesc GetCurValue GetData GetDefaultWidth GetDisplayName GetIsNull GetNewValue GetOldValue GetParentComponent GetText HasConstraints HasParent ImportedConstraint Index IsBlob IsIndexField IsNull IsValidChar KeyFields Lookup LookupCache LookupDataSet LookupKeyFields LookupList LookupResultField NewValue Notification Offset OldValue OnChange OnGetText OnSetText OnValidate Origin ParentField PropertyChanged ProviderFlags ReadOnly ReadState RefreshLookupList Required SetAsBCD SetAsBoolean SetAsCurrency SetAsDateTime SetAsExtended SetAsFloat SetAsInteger SetAsLargeInt SetAsLongint SetAsLongWord SetAsSingle SetAsUTF8String SetAsVariant SetAsWideString SetData SetDataset SetDataType SetFieldType SetNewValue SetParentComponent SetParentField SetSize SetText Text Validate ValidChars Value Visible
From TComponent (69)
_AddRef _Release BeforeDestruction CanObserve ChangeName ComObject ComponentCount ComponentIndex Components ComponentState ComponentStyle DefineProperties DesignInfo DestroyComponents Destroying ExecuteAction FindComponent FreeNotification FreeOnRelease GetChildOwner GetChildParent GetChildren GetDeltaStreams GetEnumerator GetIDsOfNames GetNamePath GetObservers GetOwner GetTypeInfo GetTypeInfoCount iicrGetComponent InsertComponent Invoke IsImplementorOf Loaded Loading Name ObserverAdded Observers OnGetDeltaStreams Owner PaletteCreated QueryInterface ReadDeltaState ReadDeltaStream ReferenceInterface RemoveComponent RemoveFreeNotification RemoveFreeNotifications SafeCallException SetAncestor SetChildOrder SetDesigning SetDesignInstance SetInline SetName SetSubComponent Tag ToString TToStringNameMode UpdateAction Updated UpdateRegistry Updating ValidateContainer ValidateInsert ValidateRename VCLComObject WriteState
From TPersistent (4)
AssignTo FPOAttachObserver FPODetachObserver FPONotifyObservers
From TObject (37)
AfterConstruction CheckDisposed ClassInfo ClassName ClassNameIs ClassParent ClassType CleanupInstance DefaultHandler DefaultHandlerStr Dispatch DispatchStr Disposed DisposeOf Equals FieldAddress Free FreeInstance GetDisposed GetHashCode GetInterface GetInterfaceByStr GetInterfaceEntry GetInterfaceEntryByStr GetInterfaceTable GetInterfaceWeak GetLastCastErrorInfo InheritsFrom InitInstance InstanceSize MethodAddress MethodName newinstance QualifiedClassName StringMessageTable SystemHasExtendedRTTI UnitName
An experiment, built from development snapshots. Not the official Free Pascal or Lazarus documentation.