Angular2里获取（inputfile）上传文件的内容的方法

 const uploadsFile = document.getElementById(name).files[0];

 const uploadsFile=document.getElementById(name).files[0];

  const uploadsFile = document.getElementById(name);
  const file = uploadsFile.files[0];

private getUpload(obj, e) {
  if (e.target.files[0]) {
   const file = e.target.files[0];
   obj.file = file;
  }
 }

 const formData = new FormData();
  formData.append('file', this.upload.file);

 let upload = document.querySelector(selectorName);
  upload.value = null;