TWideStringField class

Declaration

Inheritance

1. TWideStringField
2. TStringField
3. TField
4. TComponent
5. TPersistent
6. TObject

Description

TWideStringField is the string field class instantiated for fields of data type ftWideString. This class overrides some of the standard TField methods to handle widestring data, and introduces some properties that are only pertinent for data fields of widestring type. It should never be necessary to create an instance of TWideStringField manually, a field of this class will be instantiated automatically for each widestring field when a dataset is opened.

See also

• TField
• TStringField
• TDataset

Properties

Value

public

Value of the field as a widestring.

Methods

CheckTypeSize	protected
GetValue	protected
GetAsString	protected
SetAsString	protected
GetAsVariant	protected
SetVarValue	protected
GetAsWideString	protected
SetAsWideString	protected
GetAsUnicodeString	protected
SetAsUnicodeString	protected
GetAsUTF8String	protected
SetAsUTF8String	protected
GetDataSize	protected
Create	public	Create a new instance of the TWideStringField class.
SetFieldType	public	Set the field type.

Inherited

From TStringField (22)

CodePage EditMask FixedChar GetAsAnsiString GetAsBoolean GetAsDateTime GetAsFloat GetAsInteger GetAsLargeInt GetAsLongWord GetDefaultWidth GetText SetAsAnsiString SetAsBoolean SetAsDateTime SetAsFloat SetAsInteger SetAsLargeInt SetAsLongWord SetValue Size Transliterate

From TField (114)

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 EditMaskPtr FieldDef FieldKind FieldName FieldNo FocusControl FreeBuffers GetAsBCD GetAsBytes GetAsCurrency GetAsExtended GetAsLongint GetAsSingle GetCanModify GetClassDesc GetCurValue GetData GetDisplayName GetIsNull GetNewValue GetOldValue GetParentComponent 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 SetAsBytes SetAsCurrency SetAsExtended SetAsLongint SetAsSingle SetAsVariant SetData SetDataset SetDataType SetNewValue SetParentComponent SetParentField SetSize SetText Text Validate ValidChars 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