//删除会员
 private void btnDelete_Click(object sender, EventArgs e)
 {
     if(dgvMemmber.SelectedRows.Count>0)
     {
         int id = Convert.ToInt32(dgvMemmber.SelectedRows[0].Cells[0].Value.ToString());
         MemberInfoBLL bll = new MemberInfoBLL();
         string msg = bll.DeleteMemberInfoByMemberId(id) ? "操作成功" : "操作失败";
         MessageBox.Show(msg);
         LoadMemberInfoByDelFlag(0);
     }
 }