public function GetValue(Renderer $renderer) { $result = ''; $primaryKeyValues = array(); ExtractPrimaryKeyValues($primaryKeyValues, METHOD_GET); $this->dataset->SetSingleRecordState($primaryKeyValues); $this->dataset->Open(); if ($this->dataset->Next()) { if ($this->column == null) { } else { $result = $renderer->Render($this->column); } } $this->dataset->Close(); return $result; }