Blazor Upload

process.cs

private async Task processImage() {
  // create single httpclient
  HttpClient client = new HttpClient {
    BaseAddress = new Uri(baseUrl + "/face/v1.0/detect?returnFaceAttributes=age,glasses,emotion,headpose,gender&ReturnFaceLandmarks=true")
  };

  HttpResponseMessage response = null;

  client.DefaultRequestHeaders.Clear();
  client.DefaultRequestHeaders.Add("Ocp-Apim-Subscription-Key", "xxxxxxxxxxxxxxxxxxx");

  // if we've uploaded files:
  if (loadedFiles.Count > 0) {

    foreach(var file in loadedFiles) {

      Stream stream = file.OpenReadStream();
      MemoryStream ms = new MemoryStream();
      await stream.CopyToAsync(ms);
      stream.Close();

      // create request object
      var request = new HttpRequestMessage(HttpMethod.Post, client.BaseAddress);

      foreach(var file in loadedFiles) {

        Stream stream = file.OpenReadStream();
        MemoryStream ms = new MemoryStream();
        await stream.CopyToAsync(ms);
        stream.Close();

        var request = new HttpRequestMessage(HttpMethod.Post, client.BaseAddress);
        var imageData = $ "data:{file.ContentType};base64,{Convert.ToBase64String(ms.ToArray())}";

        MultipartFormDataContent multipartContent = new MultipartFormDataContent();
        multipartContent.Add(new StringContent(imageData, Encoding.Default, "application/octet-stream"));

        response = await client.PostAsync(request.RequestUri, multipartContent);

      }
    }
  }
}