public DataTable load_phongdt(PHONGDIEUTRIdto p)
 {
     int thamso = 1;
     string[] name = new string[thamso];
     object[] value = new object[thamso];
     name[0] = "@maphong";
     value[0] = p.Makhoa;
     return kn.laydulieu("phong_khoa", name, value, thamso);
 }
 public DataTable load_pdt(PHONGDIEUTRIdto p)
 {
     return pdt.load_phongdt(p);
 }