{"record":{"id":"812bd5912ba051db","repo":"nopSolutions/nopCommerce","slug":"wrong-file-format","errorCode":null,"errorMessage":"Wrong file format","messagePattern":"Wrong file format","errorType":"validation","errorClass":"NopException","httpStatus":null,"severity":"error","filePath":"src/Libraries/Nop.Services/ExportImport/ImportManager.cs","lineNumber":2905,"sourceCode":"        var store = await _storeContext.GetCurrentStoreAsync();\r\n        var defaultLanguageId = store.DefaultLanguageId > 0 ? store.DefaultLanguageId : (await _workContext.GetWorkingLanguageAsync()).Id;\r\n        var defaultTypeId = ((await _newsLetterSubscriptionTypeService.GetAllNewsLetterSubscriptionTypesAsync(store.Id)).FirstOrDefault()\r\n            ?? (await _newsLetterSubscriptionTypeService.GetAllNewsLetterSubscriptionTypesAsync()).FirstOrDefault())\r\n            .Id;\r\n        var allSubscriptions = (await _newsLetterSubscriptionService.GetAllNewsLetterSubscriptionsAsync()).ToList();\r\n\r\n        var count = 0;\r\n        using (var reader = new StreamReader(stream))\r\n        {\r\n            string line;\r\n            while ((line = await reader.ReadLineAsync()) != null)\r\n            {\r\n                if (string.IsNullOrWhiteSpace(line))\r\n                    continue;\r\n\r\n                var tmp = line.Split(',');\r\n                if (tmp.Length > 5)\r\n                    throw new NopException(\"Wrong file format\");\r\n\r\n                //\"email\" field specified\r\n                var email = tmp[0].Trim();\r\n                if (!CommonHelper.IsValidEmail(email))\r\n                    continue;\r\n\r\n                //\"active\" field specified\r\n                var isActive = true;\r\n                if (tmp.Length >= 2 && !bool.TryParse(tmp[1].Trim(), out isActive))\r\n                    continue;\r\n\r\n                //\"typeId\" field specified\r\n                var typeId = defaultTypeId;\r\n                if (tmp.Length >= 3 && !int.TryParse(tmp[2].Trim(), out typeId))\r\n                    continue;\r\n\r\n                //\"storeId\" field specified\r\n                var storeId = store.Id;\r","sourceCodeStart":2887,"sourceCodeEnd":2923,"githubUrl":"https://github.com/nopSolutions/nopCommerce/blob/64bdf2ff08c8b39e65717bcf974fb43dc2ef68f2/src/Libraries/Nop.Services/ExportImport/ImportManager.cs#L2887-L2923","documentation":"Thrown while parsing a newsletter-subscribers CSV (ImportManager) when a non-blank line splits into more than 5 comma-separated fields. nopCommerce expects at most 5 fields (email, active, typeId, ..., up to 5), so a wider line is rejected as 'Wrong file format' with a NopException.","triggerScenarios":"Calling the newsletter-subscriber CSV import with a stream where some line has more than 5 comma-separated values. Lines with extra commas (e.g. unquoted fields containing commas) exceed tmp.Length > 5 and throw.","commonSituations":"CSV exported with additional columns; fields containing unescaped commas (e.g. a name field 'Doe, John'); wrong delimiter/encoding; a different CSV format than the expected subscriber template.","solutions":["Re-export the subscribers using nopCommerce's expected 5-column (or fewer) format, or trim the file to the allowed columns.","Quote any field that contains a comma, or remove commas from field values.","Verify the delimiter is a comma and there are no stray commas at line ends.","Open in Excel, delete extra columns beyond the 5 allowed, save as CSV, and re-import."],"exampleFix":"// before — line with extra column\njohn@example.com,true,1,extra,extra2,extra3   // 6 fields -> throws\n\n// after — trim to <= 5 fields\njohn@example.com,true,1","handlingStrategy":"validation","validationCode":"// Validate newsletter-subscriber CSV: at most 5 comma-separated fields per non-blank line\nforeach (var line in lines.Where(l => !string.IsNullOrWhiteSpace(l)))\n{\n    if (line.Split(',').Length > 5)\n        return BadRequest($\"Line has too many fields (max 5): {line}\");\n}\nawait _importManager.ImportNewsletterSubscribersFromTxtOrCsvAsync(stream);","typeGuard":null,"tryCatchPattern":"try { await _importManager.ImportNewsletterSubscribersFromTxtOrCsvAsync(stream); }\ncatch (NopException ex) when (ex.Message == \"Wrong file format\")\n{ /* tell the user to trim to <=5 columns and quote fields containing commas */ }","preventionTips":["Export subscribers from nopCommerce to get the expected column count.","Quote fields that contain commas, or strip commas from values.","Strip extra columns and trailing commas before importing."],"tags":["import","csv","newsletter","validation","nopcommerce"],"backgroundTag":null,"analyzedSha":"64bdf2ff08c8b39e65717bcf974fb43dc2ef68f2","analyzedAt":"2026-08-13T21:19:38.062Z","schemaVersion":2},"datasetVersion":"2026-08-14T00:17:13.853Z"}