http://www.dotblogs.com.tw/yc421206/archive/2009/02/15/7174.aspx
如何使用BackgroundWorker控件
1.在winfrom裡拖拉一個BackgroundWorker控件至from裡
2.使用RunWorkerAsync方法，將會觸動DoWork事件
this.backgroundWorker1.RunWorkerAsync(count);
3.在DoWork事件的方法中調用需要執行的方法
4.在方法中傳遞BackgroundWorker參數
5.允許BackgroundWorker報告進度
private void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e)
{
//4.在方法中傳遞BackgroundWorker參數
RunSample04(sender as BackgroundWorker);
//5.允許BackgroundWorker報告進度
this.backgroundWorker1.WorkerReportsProgress = true;
this.progressBar1.Maximum = count;
}
6.執行ReportProgress方法，觸發ProgressChanged事件
private void RunSample04(BackgroundWorker myWork)
{
myStr = "";
for (int i = 1; i <= count; i++)
{
try
{
//6.執行ReportProgress方法，觸發ProgressChanged事件
myWork.ReportProgress(i);
myStr = i.ToString();
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
Thread.Sleep(1);
Application.DoEvents();
}
}
7.ProgressChanged事件顯示，回傳執行結果
//在ProgressChanged事件的方法中顯示進度
private void backgroundWorker1_ProgressChanged(object sender, ProgressChangedEventArgs e)
{
try
{
//7.回傳執行結果
this.textBox2.Text = myStr;
this.progressBar1.Value = e.ProgressPercentage;
Thread.Sleep(1);
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
}
8.RunWorkerCompleted事件顯示，執行完成結果
//在RunWorkerCompleted事件的方法中顯示被執行方法的結果
private void backgroundWorker1_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
{
//if (e.Error != null)
//{
// MessageBox.Show(e.Error.Message, "提示", MessageBoxButtons.OK, MessageBoxIcon.Error);
// return;
//}
//else if (e.Cancelled)
//{
// MessageBox.Show("取消操作！", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
// return;
//}
//else
//{
// MessageBox.Show("操作成功！", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
//}
}
執行結果：