private void btn_Out_Click(object sender, EventArgs e) { if (this.Lvw_Task.CheckedItems.Count == 0) { MessageBox.Show("请选择要打印的生产任务", "出库管理", MessageBoxButtons.OK, MessageBoxIcon.Exclamation); } else { Invoice invoice = new Invoice(); string taskStr = ""; foreach (ListViewItem item in this.Lvw_Task.Items) { if (item.Checked) { taskStr = taskStr + item.Text.Trim() + "-"; item.Remove(); } } invoice.NewSend(taskStr); MessageBox.Show("出库成功", "出库管理", MessageBoxButtons.OK, MessageBoxIcon.Asterisk); this.Lvw_TaskNp.Items.Clear(); this.btn_Refresh_Click(this, new EventArgs()); } }