IFormFile always return null in asp.net core 2.1

Question

Api method is looks like below

    [HttpPost]
    public async Task> MediaBrand(IFormFile file, int brandId)
         


        

Answer 1

If you use javascript and FormData object you need set the name of each file to 'files'

this.files.forEach((f) => {
         formData.append("files", f, `${this.path}/${f.name}`);
      }); 

if you use other name in your post you need to set it in the attribute of the post method

formData.append("someName", f, `${this.path}/${f.name}`);

 public async Task Post([FromForm(Name ="someName")] List files)

Dont forget to set content-type

'Content-Type': 'multipart/form-data'