//修改管理员信息
 private void save_admin_Click(object sender, EventArgs e)
 {
     Model.Admin model = new Model.Admin();
     model.Id   = id.ToString();
     model.Name = textAdminname.Text.Trim();
     model.Pass = textNewPwd.Text.Trim();
     BLL.Admin bll = new BLL.Admin();
     if (bll.update(model))
     {
         MessageBox.Show("修改成功!");
     }
     else
     {
         MessageBox.Show("修改失败!", "错误");
     }
 }