using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Windows.Forms; namespace 门?票±销ú售? { public partial class 门?票±销ú售? : Form { public 门?票±销ú售?() { } InitializeComponent(); private void btnPayment_Click(object sender, EventArgs e) { double payment, receiving, balance, price; int tickets; try { tickets = Int32.Parse(txtTotalticket.Text); payment = double.Parse(txtPayment.Text); price = double.Parse(txtPrice.Text); receiving = tickets * price; txtReceive.Text = string.Format("{0:f2}", receiving); balance = payment - receiving; txtChange.Text = string.Format("{0:f2}", balance); } catch { MessageBox.Show("输?入?有瓺错洙?！?请?检ì查é购o票±类え?型í、￠折?扣?、￠ 数簓量?与?应畖付?款?"); return; } } private void btnCancel_Click(object sender, EventArgs e) { } Application.Exit(); 

private void cmbTicket_SelectedIndexChanged(object sender, EventArgs e) txtTotalticket.ReadOnly = false; txtPayment.ReadOnly = false; txtReceive.Text = ""; txtChange.Text = ""; grpDiscount.Enabled = false; double commonPrice = 35.00; switch (cmbTicketType.SelectedIndex) case 0: txtPrice.Text = string.Format("{0:f2}", commonPrice); break; case 1: txtPrice.Text = string.Format("{0:f2}", commonPrice*50/100); break; case 2: grpDiscount.Enabled = true; rdbNine.Checked = true; txtPrice.Text = string.Format("{0:f2}", commonPrice * 90 / 100); break; { } { } private void rdbNine_CheckedChanged(object sender, EventArgs e) { } double commonPrice = 35.00; txtPrice.Text = string.Format("{0:f2}", commonPrice * 90 / 100); private void rdbeight_CheckedChanged(object sender, EventArgs e) { } double commonPrice = 35.00; txtPrice.Text = string.Format("{0:f2}", commonPrice * 80 / 100); private void rdbsixfive_CheckedChanged(object sender, EventArgs e) { } double commonPrice = 35.00; txtPrice.Text = string.Format("{0:f2}", commonPrice * 65 / 100); 

} }