5
पर काम नहीं कर रहा है मेरे पास एक पृष्ठभूमि कार्यकर्ता है जो एक ही प्रक्रिया चलाता है। मैं प्रसंस्करण को रद्द करने में सक्षम होना चाहता हूं, लेकिन जब मैं CancelAsync() विधि को कॉल करता हूं, तो यह वास्तव में कभी भी रद्द नहीं होता है। मैं कहाँ गलत हूँ?Backgroundworker.CancelAsync()
private void bgw_DoWork(object sender, DoWorkEventArgs e)
{
BackgroundWorker b = sender as BackgroundWorker;
if (b != null)
{
if (!b.CancellationPending)
{
try
{
// Let's run the process as a backgroundworker so we have the ability to cancel the search, and/or be able to view results while it's still searching
ProcessParameters pp = e.Argument as ProcessParameters;
if (pp.DoReplace)
results = FindReplace.FindReplace.FindAndReplace(pp.PathToSearch, pp.FindText, pp.ReplaceText, pp.UseRegularExpressions, pp.IncludeList, pp.ExcludeList, pp.RecurseSubdirectories, pp.IgnoreCase);
else
results = FindReplace.FindReplace.Find(pp.PathToSearch, pp.FindText, pp.UseRegularExpressions, pp.IncludeList, pp.ExcludeList, pp.RecurseSubdirectories, pp.IgnoreCase);
}
catch (Exception ex)
{
MessageBox.Show(ex.ToString());
}
}
else
{
// Cancel was clicked
e.Cancel = true;
}
}
}
यहाँ विधि है कि प्रसंस्करण शुरू होता है::
यहाँ DoWork() विधि है
private void btnGo_Click(object sender, EventArgs e)
{
if (btnGo.Text == "Cancel")
{
if (DialogResult.Yes == MessageBox.Show("Are you sure you wish to cancel?", "Cancel Requested", MessageBoxButtons.YesNo, MessageBoxIcon.Question))
bgw.CancelAsync();
return;
}
if (tbFind.Text.Length == 0)
{
MessageBox.Show("Find text is not valid.");
return;
}
tbFound.Text = String.Empty;
tbFoundInThisFile.Text = String.Empty;
lvResults.Items.Clear();
includeList = null;
excludeList = null;
results = null;
if (radDirectory.Checked && !radFile.Checked)
{
includeList = BuildIncludeExcludeList(tbIncludeFiles.Text);
excludeList = BuildIncludeExcludeList(tbExcludeFiles.Text);
}
ProcessParameters pp = null;
if (chkReplace.Checked)
pp = new ProcessParameters(tbPath.Text, tbFind.Text, tbReplace.Text, chkUseRegEx.Checked, includeList, excludeList, chkRecursion.Checked, chkIgnoreCase.Checked, true);
else
pp = new ProcessParameters(tbPath.Text, tbFind.Text, chkUseRegEx.Checked, includeList, excludeList, chkRecursion.Checked, chkIgnoreCase.Checked, false);
bgw.RunWorkerAsync(pp);
// Toggle fields to locked while it's running
btnGo.Text = "Cancel";
}
और यहाँ WorkerCompleted() घटना है:
private void bgw_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
{
btnGo.Text = "Go";
string message = String.Empty;
const string caption = "FindAndReplace is Complete";
if (!e.Cancelled)
{
if (results != null)
{
tbFound.Text = results.Found.ToString();
tbSearched.Text = results.FilesSearched.ToString();
tbSkipped.Text = results.FilesSkipped.ToString();
message = String.Format("Search finished resulting in {0} match(es).", results.Found);
}
else
message = "The FindAndReplace results were empty. The process was cancelled or there was an error during operation.";
}
else
message = "The FindAndReplace process was cancelled.";
if (e.Error != null)
message += String.Format("{0}{0}There was an error during processing: {1}", Environment.NewLine, e.Error);
MessageBox.Show(message, caption);
}
आपके पास केवल एक बहुत छोटी विंडो है जो रद्द करने के लिए जांचती है। आप इसे गर्म नहीं करेंगे। –
ओटी लेकिन आपके पूर्ण हैंडलर में ई.इरर की जांच पहले जाना चाहिए। –