如何实现DataGridView实时更新数据【Z】

原帖：http://bbs.bccn.net/thread-341646-1-1.html

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



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

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 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";
}

}
}

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

namespace WindowsFormsApplication1
{
public partial class FormMain : Form
{
Test.Model.queue queue = null;
Test.BLL.queue queueBLL = new Test.BLL.queue();
Test.BLL.ChangeDB changeDbBLL = new Test.BLL.ChangeDB();
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
private delegate void myDelegate(int id);//定义委托

public FormMain()
{
InitializeComponent();
label2.Text = "更新频率为:" + (trackBar1.Value / 1000).ToString() + "秒";
this.dataGridView1.DataSource = queueBLL.GetAllList();
this.dataGridView1.DataMember = "ds";
}

private void FormMain_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 = queueBLL.GetAllList().Tables[0];//自己写的数据封装类 能够返回一个datatable
Grid(Test.BLL.ModifStatic.Id);
Thread.Sleep(frequency);
}
else
{
//statusInfo = "停止更新!";
}
}

}

private void Grid(int id)
{
if (this.InvokeRequired)
{
this.Invoke(new myDelegate(Grid), new object[] { id });
}
else
{
try
{
//修改改id对应的行
for (int i = 0; i < this.dataGridView1.Rows.Count; i++)
{
if (Convert.ToInt32(this.dataGridView1.Rows[i].Cells[0].Value) == id)
{
queue = queueBLL.GetModel(id);
this.dataGridView1.Rows[i].Cells[1].Value = queue.remainNum;
}
}
// statusInfo = "更新完成!";
}
catch
{

}
}
}

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

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

Thread th = null;
private void buttonModif_Click(object sender, EventArgs e)
{
th = new Thread(new ThreadStart(changeDbBLL.DBAdd));
th.Start();
}

//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;
//            this.dataGridView1.DataMember = "ds";
//            dt = null;
//            statusInfo = "更新完成!";
//        }
//        catch
//        {

//        }
//    }
//}

private void trackBar1_Scroll_1(object sender, EventArgs e)
{
label2.Text = "更新频率为:" + trackBar1.Value.ToString() + "秒";
}

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;
}
}

}

}