backgroundworker_C#while 线程等待_C# stringbuilder(3)

}

//backgroundWorker1.ReportProgress(i * 100 / num);

backgroundWorker1.ReportProgress(i * 100 / num,i);//报告完成进度

Thread.Sleep(0);//后台线程交出时间片

}

return true;

}

private void backgroundWorker1_ProgressChanged(object sender,ProgressChangedEventArgs e)

{

//将完成进度数据传给进度条

progressBar1.Value = e.ProgressPercentage;

label1.Text = e.ProgressPercentage + '%';

//将中间计算结果在ListBox控件中显示出来

listBox1.Items.Add(e.UserState);

}

Private void backgroundWorker1_RunWorkerCompleted(object sender,RunWorkerCompletedEventArgs e)

{

if (!e.Cancelled && e.Error!=null)

{

MessageBox.Show('处理完成了吗？ ' + e.Result);

}

else//如果取消后台线程或发生了异常

{

MessageBox.Show('处理完成了吗？ false');

}

}

//取消按钮

private void button2_Click(object sender, EventArgs e)

{

if (backgroundWorker1.WorkerSupportsCancellation==true)

{

backgroundWorker1.CancelAsync();//取消后台操作

backgroundWorker1.Dispose();//释放资源

}

}

}

}

运行结果如下图：

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