c#基础，单线程，跨线程访问和线程带参数

using System;
using System.Collections.Generic;
using System.Threading;
using System.Windows.Forms;

namespace 线程和跨线程
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        /// <summary>
        /// 单线程直接假死了
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void btnAlone_Click(object sender, EventArgs e)
        {
            for (int i = 0; i < 100000; i++)
            {
                //通过[调试]-[窗口]-[输出]显示打印值
                Console.WriteLine(i);
            }
        }


        /// <summary>
        /// 新线程运行，窗体不假死
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void btnNew_Click(object sender, EventArgs e)
        {
            Thread th = new Thread(ShowCalculator)
            {
                IsBackground = true
            };
            th.Start();

        }
        /// <summary>
        /// 循环计算方法，供新线程使用
        /// </summary>
        private void ShowCalculator()
        {
            for (int i = 0; i < 100000; i++)
            {//通过[调试]-[窗口]-[输出]显示打印值
                Console.WriteLine(i);
            }
        }
        /// <summary>
        /// 带参数的
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void btnParameters_Click(object sender, EventArgs e)
        {
            List<int> list = new List<int>() { 1, 2, 3, 4, 5 };
            ParameterizedThreadStart parThreadStart = new ParameterizedThreadStart(ShowParameters);
            Thread th = new Thread(parThreadStart) { IsBackground = true };
            th.Start(list);
        }
        private void ShowParameters(object obj)
        {
            //线程中的参数只能是Object
            List<int> result = obj as List<int>;
            foreach (var item in result)
            {
                MessageBox.Show(item.ToString());
            }
        }
        /// <summary>
        /// 跨线程访问
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void button1_Click(object sender, EventArgs e)
        {
            Thread th = new Thread(ShowMulti) { IsBackground = true };
            th.Start();
        }
        /// <summary>
        /// 解决跨线程访问报异常,不使用关闭跨线程检查
        /// </summary>
        private void ShowMulti()
        {
            int first = 0;
            for (int i = 0; i < 10; i++)
            {
                first = i;
            }
            //是否要对lbl控件进行跨线程
            if (this.lblShow.InvokeRequired)
            {
                //对委托中的数据类型验证
                this.lblShow.Invoke(new Action<Label, string>(ShowLableValue), this.lblShow, first.ToString());
            }
            else
            {
                this.lblShow.Text = first.ToString();
            }
        }
        /// <summary>
        /// 把值写到控件中
        /// </summary>
        /// <param name="lbl"></param>
        /// <param name="value"></param>
        private void ShowLableValue(Label lbl, string value)
        {
            lbl.Text = value;
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            //关闭跨进程检查
            //Label.CheckForIllegalCrossThreadCalls = false;
            //改用委托方法实现
        }
    }
}