void Edit_Data()
{
string id = dtgvgroup.SelectedCells[0].OwningRow.Cells["ID_GROUP"].Value.ToString();
gr = db.GROUP_DEVICE.Find(id);
gr.ID_GROUP = txtID.Text;
gr.NAME = txtNAME.Text;
db.SaveChanges();
Load1();
}
private void btnDel_Click(object sender, EventArgs e)
{
string id = txtID.Text;
gr = db.GROUP_DEVICE.First(p => p.ID_GROUP == id);
//foreach(var d in db.DEVICEs.Where(f => f.ID_GROUP == id))
//{
// db.DEVICEs.Remove(d);
//}
db.GROUP_DEVICE.Remove(gr);
db.SaveChanges();
Load1();
Clear();
}