Send image with HttpClient to POST WebApi and consume the data

Question

My HttpClient sends the image with PostAsync. I am not really sure what to do now since this is my first REST Api and I can\'t really adapt the things

Answer 1

1.Your controller should look like this:

//For .net core 2.1
[HttpPost]
public IActionResult Index(List files)
{
    //Do something with the files here. 
    return Ok();
}

//For previous versions

[HttpPost]
public IActionResult Index()
{
    var files = Request.Form.Files;
    //Do something with the files here. 
    return Ok();
}

2.To upload a file you can also use Multipart content:

        public async Task UploadImageAsync(Stream image, string fileName)
        {
            HttpContent fileStreamContent = new StreamContent(image);
            fileStreamContent.Headers.ContentDisposition = new System.Net.Http.Headers.ContentDispositionHeaderValue("form-data") { Name = "file", FileName = fileName };
            fileStreamContent.Headers.ContentType = new System.Net.Http.Headers.MediaTypeHeaderValue("application/octet-stream");
            using (var client = new HttpClient())
            using (var formData = new MultipartFormDataContent())
            {
                formData.Add(fileStreamContent);
                var response = await client.PostAsync(url, formData);
                return response.IsSuccessStatusCode;
            }
         }

3.If you are uploading large files you should consider streaming the files instead, you can read about it here