如何实现DataGridView实时更新数据

主要控件有 datagridview checkbox picturebox trackBar1 label
datagridview :实时显示数据
checkbox ：指示是否停止更新
picturebox :显示更新状态
trackBar1 :设置更新时间频率
label :显示一些相关信息
  1 using System;
  2 using System.Collections.Generic;
  3 using System.ComponentModel;
  4 using System.Data;
  5 using System.Drawing;
  6 using System.Text;
  7 using System.Windows.Forms;
  8 using System.Threading;
  9 
 10 namespace WinMilkProject.Project
 11 {
 12 
 13     public partial class Form1 : Form
 14     {
 15         Thread myThread;
 16         OperateCB operatedb = new OperateCB();
 17         public int frequency = 0;//更新时间频率
 18         public static bool isUse = false;//是否停止更新
 19         public static string statusInfo = string.Empty;//状态
 20         private delegate void myDelegate(DataTable dt);//定义委托
 21         public Form1()
 22         {
 23             InitializeComponent();
 24             label2.Text = "更新频率为:" + (trackBar1.Value / 1000).ToString() + "秒";
 25         }
 26 
 27         private void Form1_Load(object sender, EventArgs e)
 28         {
 29             myThread = new Thread(startFillDv);//实例化线程
 30             myThread.Start();
 31 
 32         }
 33 
 34         private void startFillDv()
 35         {
 36             while (true)
 37             {
 38                 if (isUse)
 39                 {
 40                     statusInfo = "正在实时更新数据......";      
 41                     DataTable dt = operatedb.MyDataTable("select * from test1");//把自己写的数据封装类OperaterCB 能够返回一个datatable
 42                     Grid(dt);
 43                     Thread.Sleep(frequency);
 44                 }
 45                 else
 46                 {
 47                     statusInfo = "停止更新!";
 48                 }
 49             }
 50 
 51         }
 52 
 53         private void Grid(DataTable dt)
 54         {
 55             if (this.InvokeRequired)
 56             {
 57                 this.Invoke(new myDelegate(Grid), new object[] { dt });
 58             }
 59             else
 60             {
 61                 try
 62                 {
 63                     this.dataGridView1.DataSource = null;
 64                     this.dataGridView1.DataSource = dt;
 65                     dt = null;
 66                     statusInfo = "更新完成!";
 67                 }
 68                 catch 
 69                 {
 70                     
 71                 }
 72             }
 73 
 74         }
 75 
 76         private void Form1_FormClosed(object sender, FormClosedEventArgs e)
 77         {
 78             if (this.myThread.IsAlive)
 79             {
 80                 this.myThread.Abort();//结束线程
 81             }
 82         }
 83 
 84         private void timer1_Tick(object sender, EventArgs e)
 85         {
 86             label1.Text = statusInfo;
 87             frequency = trackBar1.Value;
 88             if (statusInfo.Trim() == "正在实时更新数据......")
 89             {
 90                 pictureBox1.Visible = true;
 91             }
 92             else
 93             {
 94                 pictureBox1.Visible = false;
 95             }
 96 
 97         }
 98 
 99         private void checkBox1_CheckedChanged(object sender, EventArgs e)
100         {
101             if (checkBox1.Checked)
102             {
103                 isUse = true;
104             }
105             else
106             {
107                 isUse = false;
108             }
109 
110         }
111 
112         private void trackBar1_Scroll(object sender, EventArgs e)
113         {
114             label2.Text = "更新频率为:" + (trackBar1.Value / 1000).ToString() + "秒";
115         }
116 
117     }
118 }
效果图如下：