public DataTable bn_pk(BN_PKdto p)
 {
     int thamso = 1;
     string[] name = new string[thamso];
     object[] values = new object[thamso];
     name[0] = "@thamso";
     values[0] = p.Mapk;
     return ketnoi.laydulieu("phieukham_benhnhan", name,values, thamso);
 }
 public DataTable bn_pk(BN_PKdto p)
 {
     return bn.bn_pk(p);
 }