我有一个按钮单击事件如下:C#BackgroundWorker的使用进度更新过程完成后
private void buttonSubmitAchChecks_Click(object sender, EventArgs e)
{
if (backgroundWorker1.IsBusy) return;
SubmittingAch(true);
backgroundWorker1.WorkerReportsProgress = true;
backgroundWorker1.WorkerSupportsCancellation = true;
label_Status.Text = "Submitting checks to ACH ....";
var qry = from ds in checkTrans.IndividualCheck
where ds.SubmitToACH &&
ds.Status == "Entered" &&
ds.CheckAmount > 0 &&
ds.SubmitToACH
select ds;
if (qry.Count() <= 0)
{
label_Status.Text = "Nothing to submit. Check the Check Amount, ACH, and Status fields.";
}
else
{
progressBar1.Maximum = qry.Count();
progressBar1.Minimum = 0;
progressBar1.Step = 1;
backgroundWorker1.RunWorkerAsync(qry);
}
}
我backgroundWorker1_DoWork:
private void backgroundWorker1_DoWork(object sender, System.ComponentModel.DoWorkEventArgs e)
{
if (backgroundWorker1.CancellationPending)
{
e.Cancel = true;
}
else
{
var qry = e.Argument as EnumerableRowCollection<CheckTrans.IndividualCheckRow>;
if (qry != null)
{
Thread.Sleep(4000);
//item.Status = ach.SubmitCheck(item);
var ach = new SubmitAchChecks();
foreach (var item in qry)
{
ach.SubmitCheck(item);
backgroundWorker1.ReportProgress(1);
Console.Write("backgroundWorker1_dowork=" + progressBar1.Value.ToString() + "\r\n");
}
}
}
}
我的取消按钮:
private void cancelAsyncButton_Click(object sender, EventArgs e)
{
if (backgroundWorker1.WorkerSupportsCancellation == true)
{
label_Status.Text = "Cancelling...";
backgroundWorker1.CancelAsync();
}
}
我backgroundWorker1_RunWorkerCompleted:
private void backgroundWorker1_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
{
if (e.Cancelled == true)
{
label_Status.Text = "Canceled!";
}
else if (e.Error != null)
{
label_Status.Text = "Error: " + e.Error.Message;
}
else
{
label_Status.Text = "Done!";
}
SubmittingAch(false);
}
我backgroundWorker1_ProgressChanged:
private void backgroundWorker1_ProgressChanged(object sender, ProgressChangedEventArgs e)
{
progressBar1.Value += 1;
Console.Write("progressbar1.value=" + progressBar1.Value.ToString() + "\r\n");
}
我获得以下在我的调试窗口输出,当我处理2项:
backgroundWorker1_dowork = 0
backgroundWorker1_dowork = 0
progressbar1.value = 1
progressbar1.value = 2
事件正在触发,但正如您可以从console.write中看到的,它发生在线程完成后。我得到了进度条滚动,但只有一次dowork完成。
我在这方面做了什么错误?我希望在每个项目完成时更新它。
这与你的实际问题无关,但我注意到你正在LINQ结果'qry'中检查'ds.SubmitToACH'两次。 – 2011-04-19 02:06:50
谢谢,没有注意到。 – ErocM 2011-04-19 14:00:34