adtform.pas

delphi6 programming example

unit AdtForm;

interface

uses
  Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
  Db, DBClient, Grids, DBGrids, MidasLib;

type
  TForm1 = class(TForm)
    ClientDataSet1: TClientDataSet;
    DataSource1: TDataSource;
    DBGrid1: TDBGrid;
    ClientDataSet1ID: TIntegerField;
    ClientDataSet1Name: TADTField;
    ClientDataSet1NameLastName: TStringField;
    ClientDataSet1NameFirstName: TStringField;
    procedure ClientDataSet1NameGetText(Sender: TField; var Text: String;
      DisplayText: Boolean);
    procedure DBGrid1TitleClick(Column: TColumn);
    procedure FormCreate(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.DFM}

procedure TForm1.ClientDataSet1NameGetText(Sender: TField;
  var Text: String; DisplayText: Boolean);
begin
  Text := ClientDataSet1NameFirstName.AsString + ' ' +
    ClientDataSet1NameLastName.AsString;
end;

procedure TForm1.DBGrid1TitleClick(Column: TColumn);
begin
  if Column.Field.FullName = 'Name' then
    ClientDataSet1.IndexFieldNames := 'Name.LastName'
  else
    ClientDataSet1.IndexFieldNames := Column.Field.FullName;
end;

procedure TForm1.FormCreate(Sender: TObject);
begin
  ClientDataSet1.LogChanges := False;
end;

end.