TDataSetEnumerator¶

Enumerator for TDataset records.

Declaration¶

Source position: db.pas line 1998

type

  TDataSetEnumerator = class
  public
    constructor Create;
    function MoveNext : Boolean;
    property Current: TFields; {r}
  end;

Inheritance¶

Description¶

TDataSetEnumerator is an enumerator for the records in a dataset. It returns the TDataset.Fields instance. It navigates from the first till the last record in the dataset. The following is an example of how this can be used, in conjunction with the field enumerator:

var
  Rec : TFields;
  Fld : TField;

begin
  for Rec in MyDataset do
    for F in Rec do
      Writeln(F.Name,' : ',F.AsString);

Note that the current record pointer of the dataset is modified as the loop is traversed. If the current record is modified by other code while the loop is running, the result may become unpredictable. Similarly, if 2 enumerators are used simultaneously for the same dataset, the results are unpredictable.

Properties¶

Member	Visibility	Description
Current read only	public	Current record.

Methods¶

Member	Visibility	Description
Create	public	Create a new instance of the dataset enumerator.
MoveNext	public	Attempts to navigate to the next record.

Name	Description
TDataset	Base class for records-based data-access.
TFields	Collection of #fcl.db.TField instances.
TFieldsEnumerator	Default enumerator for the fields collection of a dataset.