C# WinForm跨线程访问UI控件

在做WinForm时，在UI线程之外调用控件会报异常：System.InvalidOperationException:“线程间操作无效: 从不是创建控件“label1”的线程访问它。”

我们只需在跨线程调用控件时增加如下代码：

if (this.InvokeRequired) 
{
	this.Invoke(new Action(() =>
	{
		lable1.Text = "Hello World！";
	}));
}

如下是我的demo

using System;
using System.Threading;
using System.Threading.Tasks;
using System.Windows.Forms;

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

        private void ChangeControl()
        {
            if (this.InvokeRequired)
            {
                this.Invoke(new Action(() =>
                {
                    lbl_msg.Text = "Hello Task！";
                }));
            }
        }
        private void btnTask_Click(object sender, EventArgs e)
        {
            Task.Run(()=> {
                ChangeControl();
            });

        }

        private void btnThread_Click(object sender, EventArgs e)
        {
            Thread thread = new Thread(()=>
            {
                if (this.InvokeRequired)
                {
                    this.Invoke(new Action(() =>
                    {
                        lbl_msg.Text = "Hello Thread！";
                    }));
                }
            }
            );
            thread.IsBackground = true;
            thread.Start();
        }
    }
}

程序运行结果