longstrings.pas

Oracle Data Access Components Source Code ODAC v.6.70.0.45

unit LongStrings;

interface

uses
{$IFDEF LINUX}
  SysUtils, Types, Classes, QGraphics, QControls, QForms, QDialogs, QStdCtrls,
  QDBCtrls, QComCtrls, QExtCtrls, QGrids, QDBGrids, QButtons, OdacClx,
{$ELSE}
  Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
  DBCtrls, ExtCtrls, Grids, DBGrids, StdCtrls, ToolWin, ComCtrls, Buttons,
  OdacVcl,
{$ENDIF}
{$IFDEF FPC}
  LResources,
{$ENDIF}
  DB, {$IFNDEF FPC}MemDS{$ELSE}MemDataSet{$ENDIF},
  OraScript, DBAccess, Ora, OraSmart, OdacDemoFrame, OdacDemoForm, DAScript;

type
  TLongStringsFrame = class(TOdacDemoFrame)
    DBGrid: TDBGrid;
    DataSource: TDataSource;
    ToolBar: TPanel;
    meComments: TDBMemo;
    Query: TSmartQuery;
    Splitter1: TSplitter;
    ToolBar1: TPanel;
    OpenDialog: TOpenDialog;
    SaveDialog: TSaveDialog;
    Panel1: TPanel;
    btOpen: TSpeedButton;
    btClose: TSpeedButton;
    DBNavigator: TDBNavigator;
    cbLongStrings: TCheckBox;
    Panel2: TPanel;
    btClear: TSpeedButton;
    btSave: TSpeedButton;
    btLoad: TSpeedButton;
    Panel3: TPanel;
    procedure btOpenClick(Sender: TObject);
    procedure btCloseClick(Sender: TObject);
    procedure btLoadClick(Sender: TObject);
    procedure btSaveClick(Sender: TObject);
    procedure cbLongStringsClick(Sender: TObject);
    procedure btClearClick(Sender: TObject);
  private
    { Private declarations }
  public
    procedure Initialize; override;
    procedure SetDebug(Value: boolean); override;
  end;

implementation

{$IFNDEF FPC}
{$IFDEF CLR}
{$R *.nfm}
{$ENDIF}
{$IFDEF WIN32}
{$R *.dfm}
{$ENDIF}
{$IFDEF LINUX}
{$R *.xfm}
{$ENDIF}
{$ENDIF}

procedure TLongStringsFrame.btOpenClick(Sender: TObject);
begin
  Query.Open;
end;

procedure TLongStringsFrame.btCloseClick(Sender: TObject);
begin
  Query.Close;
end;

procedure TLongStringsFrame.btLoadClick(Sender: TObject);
var
  List: TStringList;
begin
  if Query.Active and OpenDialog.Execute then begin
    if Query.State = dsBrowse then
      Query.Edit;

    if Query.FieldByName('Value') is TBlobField then
      TBlobField(Query.FieldByName('Value')).LoadFromFile(OpenDialog.FileName)
    else begin
      List := TStringList.Create;
      try
        List.LoadFromFile(OpenDialog.FileName);
        Query.FieldByName('Value').AsString := List.Text;
      finally
        List.Free;
      end;
    end;
  end;
end;

procedure TLongStringsFrame.btSaveClick(Sender: TObject);
var
  List: TStringList;
begin
  if not Query.EOF and SaveDialog.Execute then
    if Query.FieldByName('Value') is TBlobField then
      TBlobField(Query.FieldByName('Value')).SaveToFile(SaveDialog.FileName)
    else begin
      List := TStringList.Create;
      try
        List.Text := Query.FieldByName('Value').AsString;
        List.SaveToFile(SaveDialog.FileName);
      finally
        List.Free;
      end;
    end;
end;

procedure TLongStringsFrame.Initialize;
begin
  inherited;

  Query.Connection := Connection;

  cbLongStrings.Checked := Query.OptionsDS.LongStrings;
end;

procedure TLongStringsFrame.cbLongStringsClick(Sender: TObject);
var
  OldActive: boolean;
begin
  OldActive := Query.Active;
  Query.Active := False;
  Query.OptionsDS.LongStrings := cbLongStrings.Checked;
  Query.Active := OldActive;
end;

procedure TLongStringsFrame.btClearClick(Sender: TObject);
begin
  if Query.Active then begin
    if Query.State = dsBrowse then
      Query.Edit;
    Query.FieldByName('Value').AsString := '';
  end;
end;

procedure TLongStringsFrame.SetDebug(Value: boolean);
begin
  Query.Debug := Value;
end;

initialization
{$IFDEF FPC}
{$I LongStrings.lrs}
{$ENDIF}

end.