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 门票销售计算器
{
    public partial class Form2 : Form
    {
        private double commanPrice;
        public Form2()
        {
            InitializeComponent();
        }

        private void buttonClose_Click(object sender, EventArgs e)
        {
            if (MessageBox.Show("您确定要结束门票购买马？", "提示！", MessageBoxButtons.YesNo, MessageBoxIcon.Question) == DialogResult.Yes)
            {
                Application.Exit();
            }
        }

        private void Form2_Load(object sender, EventArgs e)
        {
            commanPrice = 45;
            discount_groupBox.Enabled = false;
        }

        private void radioNine_CheckedChanged(object sender, EventArgs e)
        {
            receiving_textBox.Clear();
            payment_textBox.Clear();
            balance_textBox.Clear();
            total_ticket_textBox.Clear();
            price_textBox.Text = String.Format("{0:F2}", commanPrice * 0.9);
        }

        private void radioEight_CheckedChanged(object sender, EventArgs e)
        {
            receiving_textBox.Clear();
            payment_textBox.Clear();
            balance_textBox.Clear();
            total_ticket_textBox.Clear();
            price_textBox.Text = String.Format("{0:F2}", commanPrice * 0.8);
        }

        private void radioSixFive_CheckedChanged(object sender, EventArgs e)
        {
            receiving_textBox.Clear();
            payment_textBox.Clear();
            balance_textBox.Clear();
            total_ticket_textBox.Clear();
            price_textBox.Text = String.Format("{0:F2}", commanPrice * 0.65);
        }

        private void ticket_type_ComBox_SelectedIndexChanged(object sender, EventArgs e)
        {
            double price;
            total_ticket_textBox.ReadOnly = false;
            payment_textBox.ReadOnly = false;
            receiving_textBox.Clear();
            payment_textBox.Clear();
            balance_textBox.Clear();
            total_ticket_textBox.Clear();
            discount_groupBox.Enabled = false;
            switch (ticket_type_ComBox.SelectedIndex)
            {
                case 0:
                    price_textBox.Text = string.Format("{0:F2}", commanPrice);
                    break;
                case 1:
                    price = commanPrice * 50.0 / 100.0;
                    price_textBox.Text = string.Format("{0:F2}",price);
                    break;
                case 2:
                    discount_groupBox.Enabled = true;
                    radioNine.Checked = true;
                    price = commanPrice * 90.0 / 100.0;
                    price_textBox.Text = string.Format("{0:F2}",price);
                    break;
            }
        }

        private void total_ticket_textBox_KeyPress(object sender, KeyPressEventArgs   e)
        {
            if (e.KeyChar == Convert.ToChar(13))
            {
                int tickets = Int32.Parse(total_ticket_textBox.Text);
                double price = double.Parse(price_textBox.Text);
                double receiving = tickets * price;
                receiving_textBox.Text = string.Format("{0:f2}", receiving);
                payment_textBox.Focus();
            }
        }

        private void buttonBuy_Click(object sender, EventArgs e)
        {
            try
            {
                int tickets = Int32.Parse(total_ticket_textBox.Text);
                double price = double.Parse(price_textBox.Text);
                double payment = double.Parse(payment_textBox.Text);
                double receiving = tickets * price;
                receiving_textBox.Text = string.Format("{0:f2}", receiving);
                double balance = payment - receiving;
                balance_textBox.Text = string.Format("{0:f2}", balance);
            }
            catch(Exception )
            {
                MessageBox.Show("输入有错！请检查购票类型、折扣值、购票数量或实付款！", "错误提示！", MessageBoxButtons.OK, MessageBoxIcon.Error);
                return;
            }
        }
     

    }
}