frxdbxcomponents.pas

这个是功能强大的报表软件

begin
  FDatabase.DriverName := Value;
end;

procedure TfrxDBXDatabase.SetGetDriverFunc(const Value: String);
begin
  FDatabase.GetDriverFunc := Value;
end;

procedure TfrxDBXDatabase.SetLibraryName(const Value: String);
begin
  FDatabase.LibraryName := Value;
end;

procedure TfrxDBXDatabase.SetLoginPrompt(Value: Boolean);
begin
  FDatabase.LoginPrompt := Value;
end;

procedure TfrxDBXDatabase.SetParams(Value: TStrings);
begin
  FStrings.Assign(Value);
end;

procedure TfrxDBXDatabase.SetVendorLib(const Value: String);
begin
  FDatabase.VendorLib := Value;
end;

procedure TfrxDBXDatabase.OnChange(Sender: TObject);
begin
  if not FLock then
    FDatabase.Params.Assign(FStrings);
end;


{ TfrxDBXTable }

constructor TfrxDBXTable.Create(AOwner: TComponent);
begin
  FTable := TSQLTable.Create(nil);
  DataSet := FTable;
  SetDatabase(nil);
  inherited;
end;

destructor TfrxDBXTable.Destroy;
begin
  inherited;
end;

constructor TfrxDBXTable.DesignCreate(AOwner: TComponent; Flags: Word);
var
  i: Integer;
  l: TList;
begin
  inherited;
  l := Report.AllObjects;
  for i := 0 to l.Count - 1 do
    if TObject(l[i]) is TfrxDBXDatabase then
    begin
      SetDatabase(TfrxDBXDatabase(l[i]));
      break;
    end;
end;

class function TfrxDBXTable.GetDescription: String;
begin
  Result := frxResources.Get('obDBXTb');
end;

procedure TfrxDBXTable.Notification(AComponent: TComponent; Operation: TOperation);
begin
  inherited;
  if (Operation = opRemove) and (AComponent = FDatabase) then
    SetDatabase(nil);
end;

procedure TfrxDBXTable.SetDatabase(const Value: TfrxDBXDatabase);
begin
  FDatabase := Value;
  if Value <> nil then
    FTable.SQLConnection := Value.Database
  else if DBXComponents <> nil then
    FTable.SQLConnection := DBXComponents.DefaultDatabase
  else
    FTable.SQLConnection := nil;
  DBConnected := FTable.SQLConnection <> nil;
end;

function TfrxDBXTable.GetIndexName: String;
begin
  Result := FTable.IndexName;
end;

function TfrxDBXTable.GetIndexFieldNames: String;
begin
  Result := FTable.IndexFieldNames;
end;

function TfrxDBXTable.GetTableName: String;
begin
  Result := FTable.TableName;
end;

procedure TfrxDBXTable.SetIndexName(const Value: String);
begin
  FTable.IndexName := Value;
end;

procedure TfrxDBXTable.SetIndexFieldNames(const Value: String);
begin
  FTable.IndexFieldNames := Value;
end;

procedure TfrxDBXTable.SetTableName(const Value: String);
begin
  FTable.TableName := Value;
end;

procedure TfrxDBXTable.SetMaster(const Value: TDataSource);
begin
  FTable.MasterSource := Value;
end;

procedure TfrxDBXTable.SetMasterFields(const Value: String);
begin
  FTable.MasterFields := Value;
end;

procedure TfrxDBXTable.BeforeStartReport;
begin
  SetDatabase(FDatabase);
end;


{ TfrxDBXQuery }

constructor TfrxDBXQuery.Create(AOwner: TComponent);
begin
  FStrings := TStringList.Create;
  FQuery := TSQLQuery.Create(nil);
  DataSet := FQuery;
  SetDatabase(nil);
  inherited;
end;

destructor TfrxDBXQuery.Destroy;
begin
  FStrings.Free;
  inherited;
end;

constructor TfrxDBXQuery.DesignCreate(AOwner: TComponent; Flags: Word);
var
  i: Integer;
  l: TList;
begin
  inherited;
  l := Report.AllObjects;
  for i := 0 to l.Count - 1 do
    if TObject(l[i]) is TfrxDBXDatabase then
    begin
      SetDatabase(TfrxDBXDatabase(l[i]));
      break;
    end;
end;

class function TfrxDBXQuery.GetDescription: String;
begin
  Result := frxResources.Get('obDBXQ');
end;

procedure TfrxDBXQuery.Notification(AComponent: TComponent; Operation: TOperation);
begin
  inherited;
  if (Operation = opRemove) and (AComponent = FDatabase) then
    SetDatabase(nil);
end;

procedure TfrxDBXQuery.SetDatabase(const Value: TfrxDBXDatabase);
begin
  FDatabase := Value;
  if Value <> nil then
    FQuery.SQLConnection := Value.Database
  else if DBXComponents <> nil then
    FQuery.SQLConnection := DBXComponents.DefaultDatabase
  else
    FQuery.SQLConnection := nil;
  DBConnected := FQuery.SQLConnection <> nil;
end;

function TfrxDBXQuery.GetSQL: TStrings;
begin
  FLock := True;
  FStrings.Assign(FQuery.SQL);
  FLock := False;
  Result := FStrings;
end;

procedure TfrxDBXQuery.SetSQL(Value: TStrings);
begin
  FQuery.SQL.Assign(Value);
  FStrings.Assign(Value);
end;

procedure TfrxDBXQuery.SetMaster(const Value: TDataSource);
begin
  FQuery.DataSource := Value;
end;

procedure TfrxDBXQuery.UpdateParams;
begin
  FQuery.SQL.Assign(FStrings);
  frxParamsToTParams(Self, FQuery.Params);
end;

procedure TfrxDBXQuery.BeforeStartReport;
begin
  SetDatabase(FDatabase);
end;

procedure TfrxDBXQuery.OnChangeSQL(Sender: TObject);
begin
  if not FLock then
  begin
    FQuery.SQL.Assign(FStrings);
    inherited;
  end;
end;

{$IFDEF QBUILDER}
function TfrxDBXQuery.QBEngine: TfqbEngine;
begin
  Result := TfrxEngineDBX.Create(nil);
  TfrxEngineDBX(Result).FQuery.SQLConnection := FQuery.SQLConnection;
end;
{$ENDIF}


{$IFDEF QBUILDER}
constructor TfrxEngineDBX.Create(AOwner: TComponent);
begin
  inherited;
  FQuery := TSQLQuery.Create(nil);
  FDBXDataset := TfrxDBXDataset.Create(nil);
  FDBXDataset.Dataset := FQuery;
end;

destructor TfrxEngineDBX.Destroy;
begin
  FQuery.Free;
  FDBXDataset.Free;
  inherited;
end;

procedure TfrxEngineDBX.ReadFieldList(const ATableName: string;
  var AFieldList: TfqbFieldList);
var
  TempTable: TSQLTable;
  Fields: TFieldDefs;
  i: Integer;
  tmpField: TfqbField;
begin
  AFieldList.Clear;
  TempTable := TSQLTable.Create(Self);
  TempTable.SQLConnection := FQuery.SQLConnection;
  TempTable.TableName := ATableName;
  Fields := TempTable.FieldDefs;
  try
    try
      TempTable.Active := True;
      tmpField:= TfqbField(AFieldList.Add);
      tmpField.FieldName := '*';
      for i := 0 to Fields.Count - 1 do
      begin
        tmpField := TfqbField(AFieldList.Add);
        tmpField.FieldName := Fields.Items[i].Name;
        tmpField.FieldType := Ord(Fields.Items[i].DataType)
      end;
    except
    end;
  finally
    TempTable.Free;
  end;
end;

procedure TfrxEngineDBX.ReadTableList(ATableList: TStrings);
begin
  ATableList.Clear;
  FQuery.SQLConnection.GetTableNames(ATableList, ShowSystemTables);
end;

function TfrxEngineDBX.ResultDataSet: TDataSet;
begin
  Result := FDBXDataset;
end;

procedure TfrxEngineDBX.SetSQL(const Value: string);
begin
  FQuery.SQL.Text := Value;
end;
{$ENDIF}



initialization
  frxObjects.RegisterObject1(TfrxDBXDataBase, nil, '', {$IFDEF DB_CAT}'DATABASES'{$ELSE}''{$ENDIF}, 0, 57);
  frxObjects.RegisterObject1(TfrxDBXTable, nil, '', {$IFDEF DB_CAT}'TABLES'{$ELSE}''{$ENDIF}, 0, 58);
  frxObjects.RegisterObject1(TfrxDBXQuery, nil, '', {$IFDEF DB_CAT}'QUERIES'{$ELSE}''{$ENDIF}, 0, 59);

finalization
  frxObjects.UnRegister(TfrxDBXDataBase);
  frxObjects.UnRegister(TfrxDBXTable);
  frxObjects.UnRegister(TfrxDBXQuery);


end.