private async Task LoadSubjectDataList()
{
SubjectDataService subjectDataService = new SubjectDataService(new EntityFramework.TimetableManagerDbContext());
SubjectList = await subjectDataService.GetSubjectsAsync();
SubjectList.ForEach(e =>
{
SubjectDataList.Add(e);
});
}
private void DeleteButton_Click(object sender, RoutedEventArgs e)
{
Subject selectedSubject = (Subject)SubjectDataGrid.SelectedItem;
SubjectDataService subjectDataService = new SubjectDataService(new EntityFramework.TimetableManagerDbContext());
subjectDataService.DeleteSubject(selectedSubject.Id).ContinueWith(result =>
{
if (result == null)
{
MessageBox.Show("Unable to Delete!", "Error");
}
});
_ = SubjectDataList.Remove(selectedSubject);
}
private void SaveButton_Click(object sender, RoutedEventArgs e)
{
if (SubjectNameTextBox.Text.Trim() == "" || SubjectCodeTextBox.Text.Trim() == "" || LectureHoursTextBox.Text.Trim() == "" || TutorialHoursTextBox.Text.Trim() == "" || LabHoursTextBox.Text.Trim() == "" || EvaluationHoursTextBox.Text.Trim() == "" || YearSemesterComboBox.SelectedItem == null)
{
MessageBox.Show("Sorry! Fields cannot be empty!", "Error");
return;
}
Subject subject = new Subject
{
SubjectName = SubjectNameTextBox.Text.Trim(),
SubjectCode = SubjectCodeTextBox.Text.Trim(),
LectureHours = Int32.Parse(LectureHoursTextBox.Text.Trim()),
TutorialHours = Int32.Parse(TutorialHoursTextBox.Text.Trim()),
LabHours = Int32.Parse(LabHoursTextBox.Text.Trim()),
EvaluationHours = Int32.Parse(EvaluationHoursTextBox.Text.Trim()),
OfferedYearSemester = YearSemesterComboBox.SelectedItem.ToString()
};
SubjectDataService subjectDataService = new SubjectDataService(new EntityFramework.TimetableManagerDbContext());
if (SubjectCodeTextBox.IsEnabled)
{
subjectDataService.AddSubject(subject).ContinueWith(result =>
{
if (result != null)
{
MessageBox.Show("Subject Added!", "Success");
}
else
{
MessageBox.Show("Error occured!", "Error");
}
});
}
else
{
SubjectCodeTextBox.IsEnabled = true;
subjectDataService.UpdateSubject(subject).ContinueWith(result =>
{
if (result != null)
{
MessageBox.Show("Subject Updated!", "Success");
}
else
{
MessageBox.Show("Error occured!", "Error");
}
});
}
SubjectNameTextBox.Clear();
SubjectCodeTextBox.Clear();
LectureHoursTextBox.Clear();
TutorialHoursTextBox.Clear();
LabHoursTextBox.Clear();
EvaluationHoursTextBox.Clear();
YearSemesterComboBox.SelectedIndex = -1;
SubjectDataList.Clear();
_ = LoadSubjectDataList();
}