Send multiple files using ASP.net core web api

Question

I need to send multiple files to ASP.net core webApi method.I have tried as shown below.But it always shows as 0 files.Can you tell me why ?

[Route("api/[controller]/[action]")]
[Consumes("application/json", "application/json-patch+json", "multipart/form-data")]
public class DocumentUploadController : CpcpControllerBase
{
    [HttpPost]
    public async Task<List<string>> AddDocument(ICollection<IFormFile> files)
    {
        foreach (var f in files)
        {
            var stream = f.OpenReadStream();
            var name = f.FileName;
        }
    }
}

Postman :

But I can send 1 file as shown below.It's working fine.

[HttpPost]
public async Task<string> AddDocument(IFormFile file)
{
        var stream = file.OpenReadStream();
        var name = file.FileName;           
}

no difference. same result. that too shows as 0 files. @Set — Sampath
– Sampath, Commented Jan 17, 2017 at 21:11

Janak · Accepted Answer · 2017-01-18 04:31:03Z

8

Replace key file1 by files in postman. It works for me.

answered Jan 18, 2017 at 4:31

Janak

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4 Comments

Sampath Over a year ago

Yes,that is it.Thanks a lot :)

bugged87 Over a year ago

Hmm. I can only get this to work with param type of IFormFile. If I switch to ICollection<IFormFile> (or list or array), then I start getting "The input was not valid." back from the ASP.NET Core service.

User7291 Over a year ago

@bugged87 i am facing the same issue as you ... did you solve it?

bugged87 Over a year ago

@User7291 see my posted answer.

bugged87 · Accepted Answer · 2018-10-14 06:09:28Z

3

Use IFormFileCollection instead of ICollection<IFormFile> per docs.

answered Oct 14, 2018 at 6:09

bugged87

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Comments

mohammadAli · Accepted Answer · 2022-09-02 03:23:45Z

0

Replace key file1 by files in postman. Also we can also access files from Http Context as:

var files = HttpContext.Request.Form.Files;

answered Sep 2, 2022 at 3:23

mohammadAli

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