private void select_grptype(object sender, DataGridViewCellMouseEventArgs e)
{
int id = Convert.ToInt32(dataGridGrpType.Rows[e.RowIndex].Cells[0].Value);
selectedGrpType = db.Group_types.Find(id);
g_type.Text = selectedGrpType.group_type_name;
g_schedule.Text = selectedGrpType.Group_schedule.group_schedule_name;
}
private void add_gtype_btn_Click(object sender, EventArgs e)
{
int grp_id = db.Group_schedule.Where(g => g.group_schedule_name == g_schedule.Text).First().id;
Group_types grp_type = new Group_types();
grp_type.group_type_name = g_type.Text;
grp_type.group_schedule_id = grp_id;
db.Group_types.Add(grp_type);
db.SaveChanges();
fillDataGrpType();
}