This is often used for very large files or when you need to handle server-side errors before attempting a download. Download Excel file via AJAX MVC
You must specify xhrFields to handle the response as a blob . javascript download excel file using jquery ajax in mvc
To achieve this, you typically follow one of two patterns: the (handling the binary data in memory) or the Two-Step approach (generating a temporary file and redirecting). Method 1: The Blob Approach (Recommended) This is often used for very large files
[HttpPost] public ActionResult ExportToExcel(MyCriteria criteria) { // 1. Generate your data (e.g., from a database) var data = GetData(criteria); // 2. Create the Excel file using your preferred library using (var workbook = new XLWorkbook()) { var worksheet = workbook.Worksheets.Add("Report"); worksheet.Cell(1, 1).Value = "Hello World"; using (var stream = new MemoryStream()) { workbook.SaveAs(stream); var content = stream.ToArray(); // Return the file with the correct MIME type return File(content, "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet", "Report.xlsx"); } } } Use code with caution. 2. jQuery AJAX Call Method 1: The Blob Approach (Recommended) [HttpPost] public
Downloading an Excel file using jQuery AJAX in an ASP.NET MVC environment requires a specific workflow because standard AJAX requests are designed to handle text or JSON data, not binary file streams for direct browser downloads.
Use a library like ClosedXML or NPOI to generate the Excel stream.
This method allows you to receive the file data directly in your AJAX success callback and trigger a download using JavaScript's Blob object. 1. Controller Action