public IActionResult DisplayBatchCalculations(BatchCalculation batchCalculation) { // if all goes well, redirect to import patients with a success message // otherwise, r if (!CsvProcessor.IsCsv(batchCalculation.File)) { ViewData["ErrorMessage"] = "Could not upload patients, the file provided was not a CSV file."; return(View(viewName: "BatchCalculation")); } var errorMessages = CsvProcessor.ReadBatchPatientData(batchCalculation.File, out List <ListCalculations> calculatedPatients); if (errorMessages.Count != 0) { ViewData["ErrorMessages"] = errorMessages; } return(View(viewName: "DisplayBatchCalculations", model: calculatedPatients)); }