实现即时更新数据 反映在DataView或则DataGrid 在winform ·····

用线程写了一个：

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

namespace TestForm
{
    public partial class Form1 : Form
    {
        //定义一个变量,用于关闭线程
        private bool flag;
        //定义一个线程
        private Thread thread;

        //定义一个委托
        public delegate void MyInvoke(DataSet ds);

        public Form1()
        {
            InitializeComponent();
            flag = true;
            thread = new Thread(new ThreadStart(threadProc));
            thread.Start();
        }

        //线程回调函数
        private void threadProc()
        {
            while (flag)
            {
                //三秒种一次
                DataBind();          
                Thread.Sleep(3000);
            }
        }
        //操作DataGridView
        private void BindDataGridView(DataSet ds)
        {
            this.dataGridView1.DataSource = ds.Tables["student"];
        }
        //从数据库中取出数据,并绑定
        private void DataBind()
        {
            SqlConnection con = new SqlConnection("server=.;database=student;uid=sa;pwd=0421");
            try
            {
                con.Open();
                SqlDataAdapter sda = new SqlDataAdapter("select * from studentInfor", con);
                DataSet ds = new DataSet();
                sda.Fill(ds, "student");
                //this.dataGridView1.DataSource = ds.Tables["student"];
                //绑定数据到DataGridView
                MyInvoke mi = new MyInvoke(BindDataGridView);
                this.BeginInvoke(mi, new object[] { ds });
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
            finally
            {
                con.Close();
            }
        }

        private void button1_Click(object sender, EventArgs e)
        {
            //测试,添加一条数据,看隔一段时间后,能否取上来..
            SqlConnection con = new SqlConnection("server=.;database=student;uid=sa;pwd=0421");
            try
            {
                con.Open();
                SqlCommand cmd = new SqlCommand("insert into studentInforvalues('1111111','test')", con);
                cmd.ExecuteNonQuery();
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
            finally
            {
                con.Close();
            }
        }

        private void Form1_FormClosing(object sender, FormClosingEventArgs e)
        {
            //关闭前先关闭线程
            flag = false;
            thread.Join();
        }

    }
}


//======================================
再用Timer写一个：

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

namespace Test
{
    public partial class Form1 : Form
    {

        public Form1()
        {
            InitializeComponent();
            //设置间隔,启动Timer
            this.timer1.Interval = 3000;
            this.timer1.Enabled = true;
           
        }

        //从数据库中取出数据,并绑定
        private void DataBind()
        {
            SqlConnection con = new SqlConnection("server=.;database=student;uid=sa;pwd=0421");
            try
            {
                con.Open();
                SqlDataAdapter sda = new SqlDataAdapter("select * from studentInfor", con);
                DataSet ds = new DataSet();
                sda.Fill(ds, "student");
                this.dataGridView1.DataSource = ds.Tables["student"];
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
            finally
            {
                con.Close();
            }
        }

       
        private void button1_Click(object sender, EventArgs e)
        {
            //测试,添加一条数据,看隔一段时间后,能否取上来..
            SqlConnection con = new SqlConnection("server=.;database=student;uid=sa;pwd=0421");
            try
            {
                con.Open();
                SqlCommand cmd = new SqlCommand("insert into studentInfor values('1111111','test')", con);
                cmd.ExecuteNonQuery();
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
            finally
            {
                con.Close();
            }
        }

        private void timer1_Tick(object sender, EventArgs e)
        {
            //每隔三秒,响应一次
            DataBind();
        }
    }
}