// Tao mot phong moi tu tham so dau vao
// tuy theo loai phong ma tao doi tuong cho thich hop
private Phong TaoPhong(string ma, LoaiPhong loaiphong, int succhua)
{
Phong phong = null;
switch (loaiphong)
{
case LoaiPhong.PhongHoc:
phong = new PhongHoc(ma, succhua);
break;
case LoaiPhong.ThucHanh:
phong = new ThucHanh(ma, succhua);
break;
}
return(phong);
}
// Ham thuc hien sua thong tin mot phong
public void SuaTTMotPhong(string maphong, LoaiPhong loaiphong, int succhua)
{
Phong pMoi = null;
Phong pCu = listPhong[maphong]; // lay doi tuong phong cu
int index = listPhong.IndexOf(pCu); // lay vi tri cua phong cu trong danh sach
// tao phong moi
if (loaiphong == LoaiPhong.PhongHoc && pCu is ThucHanh)
{
pMoi = new PhongHoc(maphong, succhua);
}
else if (loaiphong == LoaiPhong.ThucHanh && pCu is PhongHoc)
{
pMoi = new ThucHanh(maphong, succhua);
}
else
{ // truong hop chi sua succhua
pCu.SucChua = succhua; // khong tao phong moi
return; // thoat khoi ham
}
listPhong.RemoveAt(index); // xoa phong cu
listPhong.Insert(index, pMoi); // chen phong moi
}
