Download File Code C# Asp.net Extra Quality Site

If you generate the file dynamically (like an Excel report or a PDF in memory), use FileContentResult.

public FileResult Download() { string path = Server.MapPath("~/App_Data/manual.zip"); byte[] fileBytes = System.IO.File.ReadAllBytes(path); string fileName = "UserManual.zip"; return File(fileBytes, System.Web.MimeMapping.GetMimeMapping(fileName), fileName); } Use code with caution. 3. Downloading Files in ASP.NET Web Forms download file code c# asp.net

For very large files, use FileStream instead of loading the entire file into a byte[] to save server memory. If you generate the file dynamically (like an

public IActionResult DownloadFile() { var filePath = Path.Combine(Directory.GetCurrentDirectory(), "wwwroot/files", "report.pdf"); var fileName = "UserReport.pdf"; // Returns the file with the specified content type and download name return PhysicalFile(filePath, "application/pdf", fileName); } Use code with caution. Downloading from a Byte Array or Stream byte[] fileBytes = System.IO.File.ReadAllBytes(path)

When implementing file downloads, keep these security tips in mind: