http://www.jb51.net/article/48823.htm
这篇文章主要介绍了c#异步操作后台运行(backgroundworker类)示例,需要的朋友可以参考下
c#异步操作，BackgroundWorker类的使用，可以在后台运行需要的代码逻辑。
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading;
using System.Windows.Forms;
namespace TestBackgroundWork {
public partial class Form1 : Form {
public Form1() {
InitializeComponent();
InitializeBackgoundWorker();
}
private BackgroundWorker backgroundWorker1;
private void InitializeBackgoundWorker() {
this.backgroundWorker1 = new System.ComponentModel.BackgroundWorker();
this.backgroundWorker1.WorkerReportsProgress = true;
this.backgroundWorker1.WorkerSupportsCancellation = true;
this.backgroundWorker1.DoWork += new DoWorkEventHandler(backgroundWorker1_DoWork);
this.backgroundWorker1.ProgressChanged += new ProgressChangedEventHandler(backgroundWorker1_ProgressChanged);
this.backgroundWorker1.RunWorkerCompleted += new RunWorkerCompletedEventHandler(backgroundWorker1_RunWorkerCompleted);
}
//**********backgroundWorker1的回调函数**********
void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e) {
BackgroundWorker worker = sender as BackgroundWorker;
for (int i = 1; i <= 10; i++) {
if (worker.CancellationPending)
{
e.Cancel = true;
}
else {
Thread.Sleep(500);
int percentComplete = (int)((float)i / (float)10 * 100);
worker.ReportProgress(percentComplete);
}
}
}
void backgroundWorker1_ProgressChanged(object sender, ProgressChangedEventArgs e) {
this.progressBar1.Value = e.ProgressPercentage;
}
void backgroundWorker1_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e) {
if (e.Error != null) { MessageBox.Show(e.Error.Message); }
else if (e.Cancelled) { resultLabel.Text = "Canceled"; }
else { resultLabel.Text = "Completed"; }
startBtn.Enabled = true;
stopBtn.Enabled = false;
}
//**********backgroundWorker1的回调函数**********
private void startBtn_Click(object sender, EventArgs e) {
resultLabel.Text = String.Empty;
this.startBtn.Enabled = false;
this.stopBtn.Enabled = true; //启动异步操作.
backgroundWorker1.RunWorkerAsync(); }
private void stopBtn_Click(object sender, EventArgs e)
{ backgroundWorker1.CancelAsync(); }
}
}
