How to upload files in asp.net core web api

Question

I am trying to implement a file upload in Asp.net Core. See my endpoit below:

 [HttpPost("upload")] [AllowAnonymous] public async Task<IActionResult> Post(List<IFormFile> files) { long size = files.Sum(f => f.Length); // full path to file in temp location var filePath = Path.GetTempFileName(); foreach (var formFile in files) { if (formFile.Length > 0) { using (var stream = new FileStream(filePath, FileMode.Create)) { await formFile.CopyToAsync(stream); } } } return Ok(new { count = files.Count, size, filePath }); }

When I test it using Postman I get the following result even if I select any file:

{ "count": 0, "size": 0, "filePath": "/var/folders/24/rmgj9ypj37709tnhxr2hgtfr0000gn/T/tmpX0SwbF.tmp" }

Provide more information, like how is the request you are sending expected, which mime type you used etc. — Tseng
– Tseng, Commented Jul 16, 2017 at 20:09

schwietertj · Accepted Answer · 2017-07-17 16:01:03Z

This should guide you in the right direction. The method is receiving a jQuery post object.

 [HttpPost] public async Task<IActionResult> ReadFileHeaders(IFormFile file) { if (file != null) { using (var stream = new MemoryStream()) { await file.CopyToAsync(stream); // Now the file is loaded into the stream variable } } return BadRequest("File required"); }

koula · Accepted Answer · 2019-09-16 15:38:46Z

There is no problem on the code. But when using postman(or similar) you will need to have the same name("files" on your case) on the parameterIllustration

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