private void DisplayMarks_Click(object sender, EventArgs e)
{
try
{
int groupSelectedIndex = GroupNameDisplaycomboBox.SelectedIndex;
int GroupId = groupsList[groupSelectedIndex].GroupId;
int subjectSelectedIndex = SubjectNameDisplaycomboBox.SelectedIndex;
int SubjectId = subjectsList[subjectSelectedIndex].SubjectId;
DataTable dta = repository.DisplayStudentsMarksForTeacher(SubjectId, GroupId);
dataGridView1.DataSource = dta;
}
catch (Exception exc)
{
MessageBox.Show(exc.ToString());
}
}