If you have the old wallet.dat, even if it is corrupt and unusable as is, you could try to click: Tools - Wallet Repair - Salvage wallet
to try to recover some private keys from it.
You mean is there's a way to recover a corrupted dat file? I remembered that I already asked it before here, because i have a corrupted dat file, there is a 10 btc2 in this wallet, so the retrieval is simple as that?
Yes but it is not guaranteed to work. It depends how corrupted it is, but worth a try.