/// <summary>
/// Creates and starts a task for each sheet in the batch.
/// Results of those tasks are awaited and later outputted.
/// The progress dialog monitors the process and is able to cancel it too.
/// </summary>
async void ProcessBatchAsync()
{
evaluationStartTime = DateTime.Now;
// initialize the progress dialog
progressDialog.SetTotalTasks(GetNumberOfSheetsInBatch());
Evaluator evaluator = new Evaluator(batch.Parameters);
List <Task <Result> > tasks = new List <Task <Result> >();
foreach (var categoryBatch in batch.CategoryBatches.Values)
{
foreach (var sheetFilename in categoryBatch.SheetFilenames)
{
Task <Result> sheetTask = new Task <Result>(
() => {
var result = evaluator.Evaluate(sheetFilename, categoryBatch.CorrectAnswers, categoryBatch.CategoryName, batch.Year);
progressDialog.IncrementProgressBarValue();
return(result);
},
progressDialog.GetCancellationToken()
);
tasks.Add(sheetTask);
sheetTask.Start();
}
}
try
{
Result[] results = await Task.WhenAll(tasks);
evaluationEndTime = DateTime.Now;
progressDialog.SetProgressLabel(ProgressBarState.Saving);
await OutputResultsDB(results);
FinishJob(false);
}
catch (Exception ex) when(ex is TaskCanceledException || ex is OperationCanceledException ||
ex is DbUpdateException || ex is DbUpdateConcurrencyException)
{
FinishJob(true);
}
}
private void evaluateButton_Click(object sender, EventArgs e)
{
if (categoryConfigurations.Count == 0)
{
MessageBox.Show(Properties.Resources.ErrorTextNoCategoriesConfigured, Properties.Resources.ErrorCaptionGeneral,
MessageBoxButtons.OK, MessageBoxIcon.Error);
return;
}
if (MessageBox.Show(Properties.Resources.PromptTextEvaluationStart, Properties.Resources.PromptCaptionEvaluationStart,
MessageBoxButtons.YesNo, MessageBoxIcon.Question) == DialogResult.No)
{
return;
}
// reset the category batches in the final klokan batch
klokanBatch.CategoryBatches = new Dictionary <string, KlokanCategoryBatch>();
// save all included batches into the final klokan batch
foreach (var pair in categoryConfigurations)
{
if (pair.Value.isIncluded)
{
klokanBatch.CategoryBatches[pair.Key] = pair.Value.batch;
}
}
if (klokanBatch.CategoryBatches.Count == 0)
{
MessageBox.Show(Properties.Resources.ErrorTextNoCategoriesSelected, Properties.Resources.ErrorCaptionGeneral,
MessageBoxButtons.OK, MessageBoxIcon.Error);
return;
}
// assign the chosen year
klokanBatch.Year = (int)(yearComboBox.SelectedItem);
// assign the chosen parameters
klokanBatch.Parameters = chosenParameters;
ProgressDialog progressDialog = new ProgressDialog(new CancellationTokenSource());
progressDialog.SetProgressLabel(ProgressBarState.Evaluating);
var jobScheduler = new JobScheduler(klokanBatch, progressDialog);
// new thread created, so that all tasks in it are planned in the threadpool and not in the WinForms synchronization context
Thread thread = new Thread(jobScheduler.Run);
thread.IsBackground = true;
thread.Start();
progressDialog.StartPosition = FormStartPosition.CenterScreen;
progressDialog.ShowDialog();
}
private void evaluateButton_Click(object sender, EventArgs e)
{
if (MessageBox.Show(Properties.Resources.PromptTextEvaluationStart, Properties.Resources.PromptCaptionEvaluationStart,
MessageBoxButtons.YesNo, MessageBoxIcon.Question) == DialogResult.No)
{
return;
}
List <TestKlokanInstance> testInstances = new List <TestKlokanInstance>();
// get all available test instances
using (var testDB = new KlokanTestDBContext())
{
var allScansQuery = from scan in testDB.Scans
select scan;
foreach (var scan in allScansQuery)
{
bool[,,] studentExpectedValues;
bool[,,] answerExpectedValues;
TableArrayHandling.DbSetToAnswers(new List <KlokanTestDBExpectedAnswer>(scan.ExpectedValues), out studentExpectedValues, out answerExpectedValues);
TestKlokanInstance testInstance = new TestKlokanInstance {
ScanId = scan.ScanId,
Image = scan.Image,
StudentExpectedValues = studentExpectedValues,
AnswerExpectedValues = answerExpectedValues
};
testInstances.Add(testInstance);
}
}
if (testInstances.Count == 0)
{
MessageBox.Show(Properties.Resources.InfoTextNoTestItems, Properties.Resources.InfoCaptionNoTestItems,
MessageBoxButtons.OK, MessageBoxIcon.Information);
return;
}
TestKlokanBatch testBatch = new TestKlokanBatch {
Parameters = chosenParameters,
TestInstances = testInstances
};
ProgressDialog progressDialog = new ProgressDialog(new CancellationTokenSource());
progressDialog.SetProgressLabel(ProgressBarState.Evaluating);
var jobScheduler = new JobScheduler(testBatch, progressDialog);
// new thread created, so that all tasks in it are planned in the threadpool and not in the WinForms synchronization context
Thread thread = new Thread(jobScheduler.Run);
thread.IsBackground = true;
thread.Start();
progressDialog.StartPosition = FormStartPosition.CenterScreen;
progressDialog.ShowDialog();
PopulateDataView();
ShowAverageCorrectness();
}