getNonce

private str getNonce(RecId _recId)
{
    str nonce;

    System.Random random = new System.Random();

    System.Int32 randomNumber = random.Next();

    if(_recId > 0)
    {
        nonce = int642str(_recId);
    }
    else
    {
        nonce =  randomNumber.ToString();
    }

    nonce = subStr(nonce, 1, 16);

    return nonce;
}