WinForms多线程编程之多线程计算器 TC

编写多线程程序，实现输入两个数字X、Y，同时启动4个线程，分别计算加减乘除。并将结果显示出来，如图所示

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;
using System.Threading;

namespace EX01_Calculator
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        double x, y;

        private void button1_Click(object sender, EventArgs e)
        {
            //异常处理
            try
            {
                x = double.Parse(txtX.Text);
                y = double.Parse(txtY.Text);
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message.ToString());

            }

            //定义线程
            Thread[] thread = new Thread[4];

            thread[0] = new Thread(new ThreadStart(NumAddition));
            thread[1] = new Thread(new ThreadStart(NumSubstruction));
            thread[2] = new Thread(new ThreadStart(NumMultiplication));
            thread[3] = new Thread(new ThreadStart(NumDivision));

            //开启线程
            thread[0].Start();
            thread[1].Start();
            thread[2].Start();
            thread[3].Start();

        }
        //加法运算
        void NumAddition()
        {
            double num = x + y;
            txtAddition.Text = num.ToString();
        }
        //减法运算
        void NumSubstruction()
        {
            double num = x - y;
            txtSubstruction.Text = num.ToString();
        }
        //乘法运算
        void NumMultiplication()
        {
            double num = x * y;
            txtMultiplication.Text = num.ToString();
        }
        //除法运算
        void NumDivision()
        {
            double num = x / y;
            txtDivision.Text = num.ToString();
        }
        private void Form1_Load(object sender, EventArgs e)
        {
            //不可编辑控件
            txtAddition.Enabled = false;
            txtDivision.Enabled = false;
            txtMultiplication.Enabled = false;
            txtSubstruction.Enabled = false;
            //线程间操作无效: 从不是创建控件“txtSubstruction”的线程访问它。解决方法
            Form1.CheckForIllegalCrossThreadCalls = false;
        }
    }
}