C#中的BackgroundWorker控件+Delegate.Invoke （委托同步调用）

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Threading;

namespace CallCenter
{
    public partial class MainFrm : Form
    {
        public bool isStart = false;
        public MainFrm()
        {
            InitializeComponent();
            RefreshDisp();
        }
        private void RefreshDisp()
        {
            lv.Items.Clear();

            for (int i = 0; i < 8; i++)
            {
                ListViewItem lvitem = new ListViewItem();
                lvitem.SubItems[0].Text = i.ToString();
                lvitem.SubItems.Add("项目编号" + i.ToString());
                lvitem.SubItems.Add("项目名称" + i.ToString());
                lvitem.SubItems.Add("项目负责人" + i.ToString());
                lvitem.SubItems.Add("项目年度-" + i.ToString());
                lvitem.SubItems.Add(DateTime.Now.ToString() + " -" + i.ToString());
                lvitem.SubItems.Add(" #" + i.ToString());
                lv.Items.Add(lvitem);
            }
           
        }
        private void RefreshDispCH(int ch)
        {
                    
            
                L_Status.Text = lv.Items[ch].SubItems[6].Text;
                lv.Items[ch].SubItems[6].Text = "test";
                for (int i = 0; i < 7; i++)
                {
                    lv.Items[ch].SubItems[i].Text = DateTime.Now.ToString() + " -" + i.ToString();   
                }
           
        }

        public delegate void D_RefreshDisp();
        public delegate void D_RefreshDispCH(int ch);

        private void backgroundWorkerRefresh_DoWork(object sender, DoWorkEventArgs e)
        {
            do
            {
               // this.Invoke(new D_RefreshDisp(RefreshDisp));    
                  
                Thread.Sleep(1000);
                this.Invoke(new D_RefreshDispCH(RefreshDispCH), 3); 
            } while (isStart);
           
           
        }

        private void backgroundWorkerRefresh_ProgressChanged(object sender, ProgressChangedEventArgs e)
        {
            
        }

        private void Startbutton_Click(object sender, EventArgs e)
        {
            Startbutton.Enabled = false;
            isStart = true;
            backgroundWorkerRefresh.RunWorkerAsync();
            
        }
    }
}