public clsManager() { dt = getDatacontex(); }
public clsStyleRoom() { dt = getDatacontex(); }
public clsHonLoan() { dt = getDatacontex(); }
public clsBookRoom() { dt = getDatacontex(); }
public clsAccount() { dt = getDatacontex(); }
public clsServiceStyle() { dt = getDatacontex(); }
public clsCustomer() { dt = getDatacontex(); }
public clsJoinBRandRom() { db = getDatacontex(); }
public clsStaff() { dt = getDatacontex(); }