// This event handler updates the progress.
private void backgroundWorker1_ProgressChanged(object sender, ProgressChangedEventArgs e)
{
//Trace.WriteLine("progresschanged"+ e.ProgressPercentage);
ProgressReporter pr = (ProgressReporter)e.UserState;
if (pr.GetTotalStaff() > 0)
{
this.progressBar1.Maximum = pr.GetTotalStaff() + 1;
}
textBox1.Text = pr.GetResult();
label1.Text = pr.GetStatus();
this.progressBar1.Value = e.ProgressPercentage;
}
// This event handler is where the time-consuming work is done.
private void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e)
{
//Trace.WriteLine("asyncwork "+ (string)e.Argument);
BackgroundWorker worker = sender as BackgroundWorker;
ProgressReporter progressReporter = new ProgressReporter(STATUS_LOADING_CSV);
worker.ReportProgress(0, progressReporter);
//creates an instance of the C++ class Class1, which contains the find duplicates code
ClassLibrary.Class1 instance = new ClassLibrary.Class1();
if (worker.CancellationPending == true)
{
//Trace.WriteLine("Cancelation pending");
e.Cancel = true;
}
//calls the c++ functions for reading, parsing and finding duplicates, and
//processes the return values to update the UI in C#, then calls again, etc,
//until its completed or cancelled
else if (instance.ReadCSVFile((string)e.Argument))
{
//successfully read csv file
if (worker.CancellationPending == true)
{
//Trace.WriteLine("canceled3");
e.Cancel = true;
}
else
{
//Trace.WriteLine("success reading csv file");
progressReporter.SetStatus(STATUS_PARSING_CSV);
worker.ReportProgress(0, progressReporter);
int totalStaff = instance.ParseCSV();
//Trace.WriteLine("total staff:" + totalStaff);
progressReporter.SetTotalStaff(totalStaff);
progressReporter.SetStatus(STATUS_FINDING_DUPLICATES_1 + totalStaff + STATUS_FINDING_DUPLICATES_2 + STATUS_FINDING_DUPLICATES_3);
worker.ReportProgress(1, progressReporter);
bool completed = false;
string[] result;
while (!completed)
{
if (worker.CancellationPending == true)
{
//Trace.WriteLine("canceled");
e.Cancel = true;
break;
}
/*gets a list of duplicate staff from c++ layer and splits it in 3 strings:
* the first contains the status ('1' == completed and '0' == in progress), for internal use by the code only
* the second is the number of staffs already checked, for internal use by the code only,
* and the third is the list to be shown to the user*/
result = instance.GetDuplicates().Split(new string[] { "\n" }, 3, StringSplitOptions.None);
progressReporter.UpdateResult(result[RESULT_INDEX_TO_USER]);
if (Int32.Parse(result[RESULT_INDEX_STATUS]) == 1)
{
//completed the whole processing, leaves the loop and prints the
//final output to the user via backgroundWorker1_RunWorkerCompleted
completed = true;
//Trace.WriteLine("completed");
}
else
{
//still in progress, updates the ui to the user
int progress = Int32.Parse(result[RESULT_INDEX_CURRENT_STAFF]) + 2;
worker.ReportProgress(progress, progressReporter);
//Trace.WriteLine("progress:" + progress);
}
}
e.Result = progressReporter.GetResult();
//Trace.WriteLine("Final result:" + e.Result);
if (worker.CancellationPending == true)
{
//Trace.WriteLine("canceled4");
e.Cancel = true;
}
else
{
//the processing is completed and the user didnt cancel it, so we write the final result into file
instance.WriteFinalResult();
}
}
}
else
{
//failed to read csv file
//Trace.WriteLine("failed to read csv file");
if (worker.CancellationPending == true)
{
//Trace.WriteLine("canceled2");
e.Cancel = true;
}
else
{
//TODO handle fail
//Trace.WriteLine(STATUS_FAILED_OPEN);
e.Result = STATUS_FAILED_OPEN;
}
}
//releases c++ resources
instance.releaseAllResources();
}