使用AJAX将文件上传到dotnet Core

<input type="file" id="fileInput">
<button id="uploadButton">上传</button>

var fileInput = document.getElementById('fileInput');
var uploadButton = document.getElementById('uploadButton');

uploadButton.addEventListener('click', function() {
  var file = fileInput.files[0];
  var formData = new FormData();
  formData.append('file', file);

  var xhr = new XMLHttpRequest();
  xhr.open('POST', '/upload', true);
  xhr.onload = function() {
    if (xhr.status === 200) {
      console.log('文件上传成功');
    } else {
      console.log('文件上传失败');
    }
  };
  xhr.send(formData);
});

[HttpPost("/upload")]
public IActionResult Upload(IFormFile file)
{
  if (file != null && file.Length > 0)
  {
    // 执行文件保存等操作
    // 例如：file.CopyTo(...);
    return Ok();
  }
  else
  {
    return BadRequest();
  }
}