WinForm多线程及委托防止界面假死

当有大量数据需要计算、显示在界面或者调用sleep函数时，容易导致界面卡死，可以采用多线程加委托的方法解决。

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

{

DataTable table;

int currentIndex = 0;

int max = 10000;

public FormMain()

{

InitializeComponent();

}

private void button1_Click(object sender, EventArgs e)

{

button1.Enabled = false;

Thread thread = new Thread(new ThreadStart(LoadData));

thread.IsBackground = true;

thread.Start();

progressBar1.Minimum = 0;

progressBar1.Maximum = max;

}

private void LoadData()

{

SetLableText("数据加载中...");

currentIndex = 0;

table = new DataTable();

table.Columns.Add("id");

table.Columns.Add("name");

table.Columns.Add("age");

while (currentIndex < max)

{

SetLableText(string.Format("当前行:{0},剩余量:{1},完成比例:{2}%", currentIndex, max - currentIndex,

(Convert.ToDecimal(currentIndex) / Convert.ToDecimal(max) * 100).ToString("f0")));

SetPbValue(currentIndex);

DataRow dr = table.NewRow();

dr["id"] = currentIndex;

string name = "张三";

dr["name"] = name;

dr["age"] = currentIndex + 5;

table.Rows.Add(dr);

currentIndex++;

}

SetDgvDataSource(table);

SetLableText("数据加载完成！");

this.BeginInvoke(new MethodInvoker(delegate()

{

button1.Enabled = true;

}));

}

delegate void labDelegate(string str);

private void SetLableText(string str)

{

if (label1.InvokeRequired)

{

Invoke(new labDelegate(SetLableText), new string[] { str });

}

else

{

label1.Text = str;

}

}

delegate void dgvDelegate(DataTable table);

private void SetDgvDataSource(DataTable table)

{

if (dataGridView1.InvokeRequired)

{

Invoke(new dgvDelegate(SetDgvDataSource), new object[] { table });

}

else

{

dataGridView1.DataSource = table;

}

}

delegate void pbDelegate(int value);

private void SetPbValue(int value)

{

if (progressBar1.InvokeRequired)

{

Invoke(new pbDelegate(SetPbValue), new object[] { value });

}

else

{

progressBar1.Value = value;

}

}

}

}

运行效果图：

}<br>运行效果图：