private void DelLessonBut_Click(object sender, EventArgs e)
{
var c = dataGridView1.SelectedCells;
int indrow;
if (c.Count == 0)
{
return;
}
indrow = c[0].RowIndex;
var s = dataGridView1.Rows[indrow];
var dels = (int)s.Cells[0].Value;
BD.SchoolEntities entities = new BD.SchoolEntities();
BD.Lessons dt = entities.Lessons.Find(dels);
entities.Lessons.Remove(dt);
entities.SaveChanges();
MessageBox.Show("Lesson delited!");
}
private void AddLessonsBut_Click(object sender, EventArgs e)
{
BD.SchoolEntities entities = new BD.SchoolEntities();
BD.Lessons lessons = new BD.Lessons();
lessons.NameL = textBox1.Text;
MessageBox.Show("Add lesson(does not work)");
}