Data.DB.TDateField Methods
From RAD Studio API Documentation
InheritedProtected
_AddRef protected Called when an application uses a component interface.
_Release protected Called when an application releases a component interface.
AccessError protected Creates en error message and returns an EDatabaseError exception.
AfterConstruction public Responds after the last constructor has executed.
Assign public Copies the Value property from another field component or assigns another object to the field component.
AssignTo protected Copies the properties of an object to a destination object.
AssignValue public Sets the field value using one of the AsInteger, AsBoolean, AsString or AsFloat properties.
AsyncSchedule protected Schedules asynch method calls.
BeforeDestruction public Performs any necessary actions before the first destructor is called.
Bind protected Verifies whether the field is a lookup field and refreshes or validates the lookup list.
CanObserve protected
ChangeName protected Sets the private, internal storage for the Name property to the string passed in
NewName. CheckDisposed protected
CheckInactive protected Checks whether the dataset is inactive or not.
CheckTypeSize protected Performs the validation of a field's size.
ClassInfo public Returns a pointer to the run-time type information (RTTI) table for the object type.
ClassName public Returns a string indicating the type of the object instance (as opposed to the type of the variable passed as an argument).
ClassNameIs public Determines whether an object is of a specific type.
ClassParent public Returns the type of the immediate ancestor of a class.
ClassType public Returns the class reference for the object's class.
CleanupInstance public Performs finalization on long strings, variants, and interface variables within a class.
Clear public Sets the value of the field to NULL.
CopyData (deprecated) protected Copies bytes of data from a given source to a given destination.
DataChanged protected Generates a deFieldChange event.
DataSetMissingError protected Raises an EDatabaseError exception.
DefaultHandler public Provides the interface for a method that processes message records.
DefineProperties protected Designates a method for storing TField unpublished data on a stream such as a form file.
Destroy public
DestroyComponents public Destroys all owned components.
Destroying public Indicates that the component and its owned components are about to be destroyed.
Dispatch public Calls message-handling methods for the object, based on the contents of the Message parameter.
EndFunctionInvoke public Blocks the caller until the specified
ASyncResult completes. EndInvoke public Blocks the caller until the specified
ASyncResult completes. Equals public Checks whether the current instance and the Obj parameter are equal.
ExecuteAction public Executes an action.
FieldAddress public Returns the address of a published object field.
FieldValueError protected Raises an EDatabaseError exception.
FindComponent public Indicates whether a given component is owned by the component.
FocusControl public Forces a form's focus to the first data-aware component associated with the field object.
Free public Destroys an object and frees its associated memory, if necessary.
FreeBuffers protected Frees used buffers.
FreeInstance public Deallocates memory allocated by a previous call to the NewInstance method.
FreeNotification public Ensures that
AComponent is notified that the component is going to be destroyed. FreeOnRelease public Frees the interface reference for components that were created from COM classes.
GetAsAnsiString protected Returns the value of the field as an AnsiString.
GetAsBoolean protected Returns the value of the field as a Boolean.
GetAsByteArray protected Returns the value of the field as a Variant holding unformatted data.
GetAsBytes protected Returns the value of the field as TBytes.
GetAsCurrency protected Returns the value of the field as a Currency.
GetAsDateTime protected Returns the value of the field as a TDateTime.
GetAsExtended protected Returns the value of the field as an Extended.
GetAsFloat protected Returns the value of the field as a Double.
GetAsGuid protected
GetAsInteger protected Returns the value of the field as an Integer.
GetAsLargeInt protected Returns the value of the field as an Int64.
GetAsLongWord protected
GetAsSingle protected Returns the value of the field as a Single.
GetAsSQLTimeStamp protected Returns the value of the field as a TSQLTimeStamp.
GetAsSQLTimeStampOffset protected Returns the value of the field as a TSQLTimeStampOffset.
GetAsString protected Returns the value of the field as a string.
GetAsVariant protected Returns the value of the field as a Variant.
GetAsWideString protected Returns the value of the field as a WideString.
GetCanModify protected Returns whether the field's contents can be modified.
GetChildOwner protected Returns the owner of a child component being read from a stream.
GetChildParent protected Returns the parent or, if there is no parent, returns the owner of a child component being read from a stream.
GetChildren protected Enumerates all child components.
GetClassDesc protected Returns the abbreviated class name of the field.
GetData (deprecated) public Returns the unformatted data for the field.
GetDataSize protected Returns the number of bytes required to store a date value, represented as an Integer, in a field.
GetDefaultWidth protected Returns the field's default width.
GetDeltaStreams protected
GetDisposed protected Getter for the Disposed property.
GetEnumerator public Returns a TComponent enumerator.
GetFieldNo protected Returns the ordinal position of the field's column in the underlying table or query result.
GetHasConstraints protected Returns whether field values are constrained.
GetHashCode public Returns an integer containing the hash code.
GetIDsOfNames protected Maps a single member and an optional set of argument names to a corresponding set of integer dispatch identifiers (dispIDs).
GetInterface public Retrieves a specified interface.
GetInterfaceEntry public Returns the entry for a specific interface implemented in a class.
GetInterfaceTable public Returns a pointer to a structure containing all of the interfaces implemented by a given class.
GetIOSize protected
GetIsNull protected Returns whether the field has data or not.
GetLookupListClass protected Returns the TLookupListClass data type.
GetNamePath public Returns a string used by the Object Inspector.
GetObservers protected Getter of Observers.
GetOwner protected Returns the owner of a component.
GetParentComponent public Returns the component which directs the loading and saving of the field.
GetSize protected Returns the size used in the definition of the physical database field for data types that support different sizes.
GetTypeInfo protected Retrieves the type information for an object.
GetTypeInfoCount protected Returns the number of type information interfaces that an object provides (either 0 or 1).
GetValue protected Fills
Value with the date and time value of this field, and returns True if the field contains a value or False if the field data is null. GetWideText protected Returns the field's value as a UnicodeString.
HasParent public Returns true, indicating that field components act as part of a larger composite.
InheritsFrom public Determines the relationship of two object types.
InitInstance public Initializes a newly allocated object instance to all zeros and initializes the instance's virtual method table pointer.
InsertComponent public Establishes the component as the owner of a specified component.
InstanceSize public Returns the size in bytes of each instance of the object type.
Invoke protected Provides access to Automation properties and methods when the component wraps an Automation object.
IsBlob public Indicates whether the field represents the data in a binary large object (BLOB) field.
IsImplementorOf public Indicates whether the component implements a specified interface.
IsValidChar public Indicates whether a particular character is valid for the field.
Loaded protected Initializes the component after the form file has been read into memory.
MethodAddress public Returns the address of a class method by name.
MethodName public Returns the name of a class method by address.
NewInstance public Allocates memory for an instance of an object type and returns a pointer to that new instance.
Notification protected Notifies that components are to be inserted to or removed from a form.
ObserverAdded protected
operator () public C++ conversion of a TComponent into a System.Classes.IInterfaceComponentReference or a System.IInterface, depending on casting.
PaletteCreated protected Responds when the component is created from the component palette.
PropertyChanged protected Generates dataset change and layout change events.
QualifiedClassName public Returns the qualified name of the class.
QueryInterface protected Returns a reference to a specified interface if the current component supports that interface.
ReadState protected Reads the state of the component.
ReferenceInterface public Establishes or removes internal links that cause this component to be notified when the implementer of a specified interface is destroyed.
RefreshLookupList public Loads LookupList with all the values for LookupResultField that match distinct values of LookupKeyFields.
RemoveComponent public Removes a specified component specified from the component's Components list.
RemoveFreeNotification public Disables the destruction notification that was enabled by FreeNotification.
RemoveFreeNotifications protected Notifies all owned components of the owner component's imminent destruction.
SafeCallException public Handles exceptions in methods declared using the safecall calling convention.
SetAncestor protected Clears or sets csAncestor state in the component's ComponentState property.
SetAsAnsiString protected Sets the value of the field with the given AnsiString value.
SetAsBoolean protected Sets the value of the field with the given Boolean value.
SetAsByteArray protected Sets the value of the field with the given unformatted data passed-in as a Variant.
SetAsBytes protected Sets the value of the field with the given unformatted data passed in as TBytes.
SetAsCurrency protected Sets the value of the field with the given Currency value.
SetAsDateTime protected Sets the value of the field with the given TDateTime value.
SetAsExtended protected Sets the value of the field with the given Extended value.
SetAsFloat protected Sets the value of the field with the given Double value.
SetAsGuid protected
SetAsInteger protected Sets the value of the field with the given Integer value.
SetAsLargeInt protected Sets the value of the field with the given Int64 value.
SetAsLongWord protected
SetAsSingle protected Sets the value of the field with the given Single value.
SetAsSQLTimeStamp protected Sets the value of the field with the given TSQLTimeStamp value.
SetAsSQLTimeStampOffset protected Sets the value of the field with the given TSQLTimeStampOffset value.
SetAsString protected Sets the value of the field with the given string value.
SetAsVariant protected Attempts to set the value of the field with the given Variant value.
SetAsWideString protected Sets the value of the field with the given WideString value.
SetChildOrder protected Sets the visual ordering of a child control.
SetData (deprecated) public Assigns unformatted data to the field.
SetDataSet protected Adds the field to the specified dataset.
SetDataType protected Sets the data type of the field's contents.
SetDesigning protected Ensures that components inserted at design time have their design-mode flag set.
SetDesignInstance protected Ensures that components inserted at design time have their design-mode flag set.
SetFieldDefProps public Sets the properties of the specified
FieldDef from this field's properties. SetFieldKind protected Sets the field's kind according to the given parameter.
SetFieldProps public Sets this field's properties from the given definition.
SetFieldType public Provides the interface for a method that can set the DataType for the field.
SetInline protected Sets the csInline bit of the component's ComponentState property.
SetParentComponent public Sets the parent component.
SetParentField protected Sets the TObjectField from which the field is derived.
SetSize protected Sets the field's size.
SetSubComponent public Identifies whether the component is a subcomponent.
SetVarValue protected Sets the value of the field with the given Variant value.
SetWideText protected Sets the value of the field with the given UnicodeString value.
ToString public Returns a string containing the class name.
UnitName public Returns the name of the unit where the class is defined.
UnitScope public Returns the class's unit scope.
UpdateAction public Updates the state of an action.
Updated protected Clears the csUpdating state in the component's ComponentState property when the component finishes updating.
UpdateRegistry protected Provides the interface for a method that adds type library and version information to the Registry on components that implement COM interfaces.
ValidateContainer protected Determines whether an object can be inserted into a container.
ValidateInsert protected Provides the interface for a method that validates a child component before it is inserted.
ValidateRename protected Ensures that renaming an owned component does not create a name conflict.
WriteState protected Writes the state of the component.