您可以在此处使用FormData

You can make use of FormData over here

CreateNewComitteeMember(mFormData,mImage){
  const HttpUploadOptions = {
    headers: new HttpHeaders({ "Content-Type": "multipart/form-data"})
  }
  const formData = new FormData();
  formData.append('data', mFormData);
  formData.append('image', mImage);
  return this.httpClient.post(url, formData, HttpUploadOptions)
}

有关 FormData