public void btnorders() { if (TitleId == 1)//当前为开桌界面 { if (!string.IsNullOrEmpty(PassValue.consumptionid)) { TitleId = 2; SetUp(); this.BtnOrders.Image = Properties.Resources.点菜2;//选中点菜 frmOrder frmorder = new frmOrder(PassValue.consumptionid); frmorder.Owner = this; frmorder.TopLevel = false; frmorder.FormBorderStyle = FormBorderStyle.None; frmorder.Dock = DockStyle.Fill; this.panelMain.Controls.Clear(); this.panelMain.Controls.Add(frmorder); frmorder.Show(); PassValue.consumptionid = ""; } else { Messagebox mb = new Messagebox(); PassValue.MessageInfor = "请先选择已开台的桌子!"; mb.Show(); } } else { if (TitleId != 2) { Messagebox mb = new Messagebox(); PassValue.MessageInfor = "您还未选桌,不能点菜!"; mb.Show(); } } }