C#跨线程访问控件和跨线程form显示

C#跨线程访问控件和跨线程form显示

https://www.shuzhiduo.com/A/ZOJPk2Glzv/

跨线程访问控件

// 主代码

// An highlighted block
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace WindowsFormsApp1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
            m_SyncContext = SynchronizationContext.Current;
        }
        pic p = new pic();
        
        SynchronizationContext m_SyncContext = null;
        private void button1_Click(object sender, EventArgs e)
        {          
            Thread TH = new Thread(new ThreadStart(PIC));
            TH.Start();
            textBox1.Text = DateTime.Now.ToString();
          
        }
        void PIC()
        {
            m_SyncContext.Post(SetTextSafePost,"");
            string[] path = new string[2];
            path[0] = @"D:\TEST\Halcon\IMGs\peppers.png";
            path[1] = @"D:\TEST\Halcon\IMGs\lena.jpg";
            Task t1 = new Task(() =>
            {

                for (int i = 0; i < 1000; i++)
                {
                    Thread.Sleep(100);
                    System.Threading.Thread.Sleep(1000);
                    if (i % 2 == 0)
                    {
                        Task t = new Task(() =>
                        {
                            p.pb.Image = Image.FromFile(path[0]);
                        });
                        t.Start();
                    }
                    else
                    {
                        p.pb.Image = Image.FromFile(path[1]);
                    }
                }
                m_SyncContext.Post(SetTextSafePost1, "");
            });
            t1.Start();          
        }        
        private void SetTextSafePost(object text)
        {
            p.Show();
        }
        private void SetTextSafePost1(object text)
        {
            p.Hide();
        }     
    }
}

// 要显示的Form

// An highlighted block
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace WindowsFormsApp1
{
    public partial class pic : Form
    {
        public pic()
        {
            InitializeComponent();
        }
        public PictureBox pb;
        private void pic_Load(object sender, EventArgs e)
        {
            this.pictureBox1.BackgroundImageLayout = ImageLayout.Stretch;
            this.pictureBox1.SizeMode = PictureBoxSizeMode.StretchImage;
            pb = pictureBox1;
        }
    }
}