//上傳圖片
public void UpdataImage()
{
  //獲取選擇的文件
  string fileName = fudImage.FileName;
  //獲取后綴名
  string fileExt = Path.GetExtension(fileName);
  if (fileExt != ".jpg")
  {
   return;
  }
  //獲取服務器端得上傳的路徑
  string serverPath = Server.MapPath("/Web/images");
  //生成文件夾
  string createDirectory = serverPath + "\\" + "Card";
  fudImage.SaveAs(createDirectory + "\\" + fileName);
}
//刪除文件
public void DelFile(string path)
{
  System.IO.FileInfo file = new FileInfo(path);
  if (file.Exists)
  {
   file.Delete();
  }
}