The file upload component from a 3rd party vendor does not work with my MVC 6 project. Therefore I built a very simple upload mechanism with standard asp.net components:
<form method="post" asp-action="Index2" asp-controller="Data" enctype="multipart/form-data">
<input type="file" name="files" multiple />
<input type="submit" value="Upload" />
</form>
This upload works fine. I receive the uploaded file in my POST-Method in the controller. However if I start the full featured upload component (dxFileUploader from DevExpress) I don't receive the file. My method in the controller will be called but the file collection is empty. In order to compare the two upload requests I created a Fiddler for both. The requests are very similar. Has someone an idea what's the problematic difference between the two requests?