TFields¶

Collection of #fcl.db.TField instances.

Declaration¶

Source position: db.pas line 1340

type

  TFields = class(TObject)
  public
    constructor Create;
    destructor Destroy;
    procedure Add;
    procedure CheckFieldName;
    procedure CheckFieldNames;
    procedure Clear;
    function FindField : TField;
    function FieldByName : TField;
    function FieldByNumber : TField;
    function GetEnumerator : TFieldsEnumerator;
    procedure GetFieldNames;
    function IndexOf : LongInt;
    procedure Remove;
    property Count: Integer; {r}
    property Dataset: TDataSet; {r}
    property Fields[Index : Integer]: TField; {rw}
  end;

Inheritance¶

Description¶

TFields mimics a TCollection class for the Fields property of TDataset instance. Since TField is a descendent of TComponent, it cannot be an item of a collection, and must be managed by another class.

Properties¶

Member	Visibility	Description
Count read only	public	Number of fields in the list.
Dataset read only	public	Dataset the fields belong to.
Fields	public	Indexed access to the fields in the list.

See all Properties

Methods¶

Member	Visibility	Description
Add	public	Add a new field to the list.
CheckFieldName	public	Check field name for duplicate entries.
CheckFieldNames	public	Check a list of field names for duplicate entries.
Clear	public	Clear the list of fields.
Create	public	Create a new instance of TFields.
Destroy	public	Free the TFields instance.
FieldByName	public	Find a field based on its name.
FieldByNumber	public	Search field based on its fieldnumber.
FindField	public	Find a field based on its name.
GetEnumerator	public	Return an enumerator for the for..in construct.
GetFieldNames	public	Get the list of fieldnames.
IndexOf	public	Return the index of a field instance.
Remove	public	Remove an instance from the list.

See all Methods

Name	Description
TField	Provide access to the contents of a single field in a record.
TDataset	Base class for records-based data-access.
TDataset.Fields	Indexed access to the fields of the dataset.