private void btnAddMarks_Click(object sender, EventArgs e)
{
string mark = val.valMark(txtMarkAdd.Text);
if (!(mark == ""))
{
MessageBox.Show(mark);
}
using (SchoolEntities db = new SchoolEntities())
{
int sno = Convert.ToInt32(cboSIDAdd.Text);
int cno = Convert.ToInt32(cboCIDAdd.Text);
Student_Course course = (from c in db.Student_Course where sno == c.SID && cno == c.CID select c).FirstOrDefault();
if (course != null)
{
MessageBox.Show("Mark Exists Already. Cannot Add Marks.");
}
else
{
course = new Student_Course();
course.SID = sno;
course.CID = cno;
course.Mark = Convert.ToInt32(txtMarkAdd.Text);
db.Student_Course.Add(course);
db.SaveChanges();
MessageBox.Show("Mark Added.");
}
updateMarks();
}
}
private void btnEdit_Click(object sender, EventArgs e)
{
using (SchoolEntities db = new SchoolEntities())
{
int cno = Convert.ToInt32(cboCIDEdit.Text);
int[] sid = (from c in db.Student_Course where c.CID == cno select c.SID).ToArray();
int sct = sid.Length;
for (int i = 0; i < sct; i++)
{
int studentid = sid[i];
Student_Course cou = (from c in db.Student_Course where c.CID == cno && c.SID == studentid select c).FirstOrDefault();
string markInput = dGVMarks.Rows[i].Cells[MarkCol].Value.ToString();
string output = val.valMark(markInput);
int markEd = Convert.ToInt32(markInput);
if (!(output == ""))
{
MessageBox.Show(output);
}
cou.Mark = markEd;
db.SaveChanges();
}
}
updateMarks();
}
