C# dataGridView控件某单元格，间隔地变换背景色

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 PingBoTest
{
    public partial class dtViewColor : Form
    {
        DataTable dtView = new DataTable();
        Thread cmpThread;
        public dtViewColor()
        {
            InitializeComponent();
        }

        private void dtViewColor_Load(object sender, EventArgs e)        {
            DataColumn dataColumn0 = new DataColumn("PlayID", typeof(string));
            dtView.Columns.Add(dataColumn0);
            DataColumn dataColumn1 = new DataColumn("TourName", typeof(string));
            dtView.Columns.Add(dataColumn1);
            DataColumn dataColumn2 = new DataColumn("StartTime", typeof(string));
            dtView.Columns.Add(dataColumn2);
            DataColumn dataColumn3 = new DataColumn("HostTeam", typeof(string));
            dtView.Columns.Add(dataColumn3);
            DataColumn dataColumn4 = new DataColumn("GuestTeam", typeof(string));
            dtView.Columns.Add(dataColumn4);
            DataColumn dataColumn5 = new DataColumn("GiveNumber", typeof(float));
            dtView.Columns.Add(dataColumn5);
            DataColumn dataColumn6 = new DataColumn("HostRate", typeof(float));
            dtView.Columns.Add(dataColumn6);
            DataColumn dataColumn7 = new DataColumn("GuestRate", typeof(float));
            dtView.Columns.Add(dataColumn7);   
            for (int y = 0; y < 10; y++)
            {
                object[] insertData = new object[7];
                insertData[0] = y;
                insertData[1] = y + 1;
                insertData[2] = y + 1;
                insertData[3] = y + 1;
                insertData[4] = y + 1;
                insertData[5] = y + 1;
                insertData[6] = y + 1;

                dtView.Rows.Add(insertData);
                dataGridView1.DataSource = dtView;
                dataGridView1.AutoSizeColumnsMode = DataGridViewAutoSizeColumnsMode.Fill;
            }
        }


        private void button2_Click(object sender, EventArgs e)
        {
            this.label1.Text = "";
            this.label2.Text = "";
            if (cmpThread != null && cmpThread.IsAlive)
            {                
                cmpThread.Abort();
            }

            cmpThread = new Thread(new ThreadStart(GridColor));
            cmpThread.IsBackground = true; 
            cmpThread.Start();
           
        }

        private void GridColor()
        {
            int time1 = Environment.TickCount;


            for (int i = 0; i < this.numericUpDown1.Value; i++)   
            {

                dataGridView1.Rows[2].Cells[2].Style.BackColor = Color.CadetBlue;
                dataGridView1.Rows[4].Cells[5].Style.BackColor = Color.DarkGray;
                Thread.Sleep(800);

                dataGridView1.Rows[2].Cells[2].Style.BackColor = Color.White;
                dataGridView1.Rows[4].Cells[5].Style.BackColor = Color.White;
                int time2 = Environment.TickCount - time1;
                label1.Invoke(new ChangeString(SetrichTextBox1Text), time2.ToString(), i.ToString());
            }
        }

        private delegate void ChangeString(string Txt , string time);//这个代理能异步调用设置文本框(可以多参数)
        private void SetrichTextBox1Text(string Txt, string time)//此部分实际上是主线程调用的(可以多参数)
        {
           this.label1.Text = Txt ;
           this.label2.Text = time; 
        }
        

       
    }
}