如何实现DataGridView实时更新数据 - 编程论坛

最近一直在研究调度涉及到用调度实时给客户发送短信的功能其中就有用到实时更新的显示发送状态的当然今天不是以QUARTE为主

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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
有时候我们希望能够实时的去更新一些信息大家可能会想到Timer 但是这样做会使界面很卡影响效果和交互性怎样才能让它不卡又能实时更新呢
线程
主要代码如下

程序代码：

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

namespace WinMilkProject.Project
{

    public partial class Form1 : Form
    {
        Thread myThread;

        public int frequency = 0;//更新时间频率
        public static bool isUse = false;//是否停止更新
        public static string statusInfo = string.Empty;//状态
        private delegate void myDelegate(DataTable dt);//定义委托
        public Form1()
        {
            InitializeComponent();
            label2.Text = "更新频率为:" + (trackBar1.Value / 1000).ToString() + "秒";
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            myThread = new Thread(startFillDv);//实例化线程
            myThread.Start();

        }

        private void startFillDv()
        {
            while (true)
            {
                if (isUse)
                {
                    statusInfo = "正在实时更新数据......";
                    DataTable dt = CommonEx.GetDataTableEx("select * from table1");//自己写的数据封装类能够返回一个datatable
                    Grid(dt);
                    Thread.Sleep(frequency);
                }
                else
                {
                    statusInfo = "停止更新!";
                }
            }

        }

        private void Grid(DataTable dt)
        {
            if (this.InvokeRequired)
            {
                this.Invoke(new myDelegate(Grid), new object[] { dt });
            }
            else
            {
                try
                {
                    this.dataGridView1.DataSource = null;
                    this.dataGridView1.DataSource = dt;
                    dt = null;
                    statusInfo = "更新完成!";
                }
                catch
                {

                }
            }

        }

        private void Form1_FormClosed(object sender, FormClosedEventArgs e)
        {
            if (this.myThread.IsAlive)
            {
                this.myThread.Abort();//结束线程
            }
        }

        private void timer1_Tick(object sender, EventArgs e)
        {
            label1.Text = statusInfo;
            frequency = trackBar1.Value;
            if (statusInfo.Trim() == "正在实时更新数据......")
            {
                pictureBox1.Visible = true;
            }
            else
            {
                pictureBox1.Visible = false;
            }

        }

        private void checkBox1_CheckedChanged(object sender, EventArgs e)
        {
            if (checkBox1.Checked)
            {
                isUse = true;
            }
            else
            {
                isUse = false;
            }

        }

        private void trackBar1_Scroll(object sender, EventArgs e)
        {
            label2.Text = "更新频率为:" + (trackBar1.Value / 1000).ToString() + "秒";
        }

    }
}

[ 本帖最后由 wangnannan 于 2011-6-1 16:52 编辑 ]