C# 线程访问控件

新建一个项目

在form1中拖一个label和一个listbox

 

 

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 Demo1
{
    public partial class Form1 : Form
    {
       
        public Form1()
        {
            InitializeComponent();
        }

 

        private void Form1_Load(object sender, EventArgs e)
        {

            Thread newthread = new Thread(new ThreadStart(BackgroundProcess));
            newthread.Start();

        }
        private delegate void CrossThreadOperationControl();
        private void BackgroundProcess()
        {
            // 将代理实例化为一个匿名代理
            CrossThreadOperationControl CrossDelete = delegate()
            {
                int i = 1;
                while (i < 5)
                {
                    // 向列表框增加一个项目
                    listBox1.Items.Add("Item " + i.ToString());
                    i++;
                }
                label1.Text = "我在新线程里访问这个lable!";
                listBox1.Items.Add(label1.Text);
            };
            listBox1.Invoke(CrossDelete);
        }

    }

  

}

 

执行后没有报错。