//上传图片
public void UpdataImage()
{
  //获取选择的文件
  string fileName = fudImage.FileName;
  //获取后缀名
  string fileExt = Path.GetExtension(fileName);
  if (fileExt != ".jpg")
  {
   return;
  }
  //获取服务器端得上传的路径
  string serverPath = Server.MapPath("/Web/images");
  //生成文件夹
  string createDirectory = serverPath + "\" + "Card";
  fudImage.SaveAs(createDirectory + "\" + fileName);
}
//删除文件
public void DelFile(string path)
{
  System.IO.FileInfo file = new FileInfo(path);
  if (file.Exists)
  {
   file.Delete();
  }
}