private void txtId_Leave(object sender, EventArgs e) { int memberId = Convert.ToInt32(txtId.Text); MemberInfo memberInfo = miBll.GetMemberInfoByMId(memberId); if (memberInfo == null) { MessageBox.Show("会员信息有误!"); return; } oi.MemberId = memberId; lblMoney.Text = memberInfo.MMoney.ToString(); lblDiscount.Text = memberInfo.Mdiscount.ToString(); lblTypeTitle.Text = memberInfo.Mtitle; lblPayMoneyDiscount.Text = (Convert.ToDecimal(lblPayMoney.Text) * Convert.ToDecimal(lblDiscount.Text)).ToString(); }