學生選課Windows窗體

 

 

 

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 課程選擇
{
    public partial class Form1 : Form
    {
        private int totalHours = 0;
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            Course[] courses = new Course[8] { new Course("大學英語", 50), new Course("高等數學", 45), new Course("計算機基礎", 30), new Course("C語言", 40), new Course("大學物理", 24), new Course("電子技術", 30), new Course("數據庫設計", 45), new Course("編譯原理", 55) };
            for (int i = 0; i < 8; i++)
            {
                comboBox1.Items.Add(courses[i]);
            }
            textBox1.Text = "0";
        }

        private void btnAdd_Click(object sender, EventArgs e)
        {
            if (comboBox1.SelectedIndex != -1)//判斷是否選擇了課程
            {
                Course c1 = (Course)comboBox1.SelectedItem;
                if (!listBox1.Items.Contains(c1))//若是listBox1中不包括選擇的課程
                {
                    listBox1.Items.Add(c1);//添加到listBox1中
                    totalHours += c1.hours;//學時隨之增長
                    textBox1.Text = totalHours.ToString();//顯示到textBox1中
                }
            }
        }

        private void btnDelete_Click(object sender, EventArgs e)
        {
            if (listBox1.SelectedIndex != -1)//判斷是否選擇了課程
            {
                Course c1 = (Course)listBox1.SelectedItem;
                listBox1.Items.Remove(c1);//從listBox1中清除
                totalHours -= c1.hours;//學時隨之減小
                textBox1.Text = totalHours.ToString();
            }
        }

    }
    public class Course
    {
        public string name;//課程名
        public int hours;//學時

        public Course(string name, int hours)
        {
            this.name = name;
            this.hours = hours;
        }

        public override string ToString()
        {
            return name;
        }
    }
}