What is the best way to send array buffer from React client to C# server?

Question

I have an array buffer that created from pdf file, I have to send that data to the server side. What is the type C# may want to get? What type should I send from the client side? not sure what is the helpful way.

Answer 1

I got it by:

The client side:

    const formData = new FormData()
    formData.append('file', new Blob([fileData]))
    const options: any = {
      method: 'POST',
      body: formData
    }

    fetch(url,options).then(res=>...)

The server function:

[HttpPost]
public ActionResult UploadFile(IFormFile file)
{
    // process the uploaded file
}