.net 6 Download File Controller !!top!! (2024)

[HttpGet("cloud-file")] public async Task DownloadFromS3(string fileName) { var response = await _s3Client.GetObjectAsync("my-bucket", fileName); if (response.ResponseStream == null) return NotFound(); return File(response.ResponseStream, response.Headers.ContentType, fileName); } Use code with caution.

Implementing a file download controller in involves using the File() helper method to return various FileResult types. Depending on whether your file is stored on a local disk, in memory, or in cloud storage, you will choose a specific implementation strategy. Core Implementation Methods .net 6 download file controller

[HttpGet("stream-large-file")] public IActionResult StreamFile() { var stream = new FileStream("C:\\Data\\LargeVideo.mp4", FileMode.Open, FileAccess.Read); // ASP.NET Core handles closing the stream automatically after the transfer return new FileStreamResult(stream, "video/mp4") { FileDownloadName = "LargeVideo.mp4" }; } Use code with caution. Step-by-Step: Returning a File from a Controller 1

For high-volume or large file downloads, use FileStreamResult to keep memory usage constant regardless of file size. "video/mp4") { FileDownloadName = "LargeVideo.mp4" }

: Used for files located within the web root ( wwwroot ) folder. Step-by-Step: Returning a File from a Controller 1. Basic File Download (Physical Path)

In .NET 6, controllers can return files using several specialized result classes derived from FileResult :

When files are stored in the cloud, you can stream the response stream directly to the client.