//ddlDept.OnSelectedIndexChanged and txtBookingDate_TextChanged,ddlbilltype.OnSelectedIndexChanged protected void txtBookingDate_TextChanged(object sender, EventArgs e) { BindInfoByDep(ddlDept.SelectedItem.Text); HideFieldsWhenRefund(); if (hidID.Value == "0") //新增 { txtInnerReferenceID.Text = svr.GetNextInnerReferenceID( ddlDept.SelectedItem.Text, txtBookingDate.Text, ddlBillType.SelectedValue); } }