Asp Net Core |best| Download File From Byte Array Official

Retrieving images from a database or external API where the data is already in memory.

[HttpGet("download")] public IActionResult DownloadFile() { // Example: A small byte array representing a simple text file byte[] fileBytes = System.Text.Encoding.UTF8.GetBytes("Hello, this is a downloaded file!"); string fileName = "example_document.txt"; string contentType = "text/plain"; // Returns a FileContentResult return File(fileBytes, contentType, fileName); } Use code with caution. 2. When to Use FileContentResult asp net core download file from byte array

To ensure the browser handles the download correctly, you must specify several key pieces of metadata: Using FileContentResult in ASP.Net Core MVC [2026] Retrieving images from a database or external API