Apr 28, 2017 · I'm using the ASP.NET Web Api to communicate between client and server. My client has a "SendFile" method which I believe works fine, but I don't know how to make my server receive the data I'm sending via a stream.

In a regular MVC controller, we can output pdf with a FileContentResult. var stream = new MemoryStream(); //... add content to the stream. return File(stream.GetBuffer(), "application/pdf", "test.pdf"); But how can we change it into an ApiController? //... return Ok(pdfOutput); Here is what I've tried but it doesn't seem to work.

Apr 4, 2017 · I want to return a file in my ASP.Net Web API Controller, but all my approaches return the HttpResponseMessage as JSON. var response = new HttpResponseMessage(HttpStatusCode.OK); response.Content = new StreamContent({{__insert_stream_here__}}); response.Content.Headers.ContentType = new MediaTypeHeaderValue("application/octet-stream");

Sep 27, 2024 · Upload large files with streaming. The 3.1 example demonstrates how to use JavaScript to stream a file to a controller action. The file's antiforgery token is generated using a custom filter attribute and passed to the client HTTP headers instead of in the request body.

Apr 1, 2022 · It seems the Minimal API that got introduced in ASP.NET Core 6.0 will now be finished in 7.0. One feature that was heavily missed in 6.0 was the File Upload, as well as the possibility to read the request body as a stream. Let's have a look how this would look alike.

Feb 8, 2022 · In the Asp.net core Minimal API application, you can use the Results.File to return file to download from your minimal APIs handler, like this: app.MapGet("/video", (int id) => { var filename = "file_example.mp4"; //Build the File Path.

Jul 3, 2024 · In this article, we are going to learn how to handle uploading large files in ASP.NET Core. We are going to talk about why using byte[] or MemoryStream can be problematic and discuss the benefits of using streams instead.

May 31, 2019 · So you can easily put your data in to a stream, but then you need to return it in the right way from the WebAPI. To return a file stream, you can use a FileStreamResult. This lets you specify the stream, the MIME type, and some other options (like the file name). // Note that we are NOT using a "using" block here. This is intentional as.

Dec 9, 2021 · IFormFile exposes the file content as a stream. You can save this to disk by creating a FileStream and copying the file stream to it. Here’s an example of saving the file to disk: [HttpPost] public async Task<IActionResult> Post(IFormFile file) { if (file.Length <= 0) return BadRequest("Empty file");

Apr 6, 2025 · With that done, let’s create the .NET 9 Web API project. This Web API will be responsible for the following, Initiates the multipart upload, and retuns the upload id back to the client. Generates Pre-Signed URLs to upload each chunk of data that is split by the client. Completes the multi part upload as soon as the client signals the API.