public int DeleteById(int ID)
 {
     int nResult = 0;
     cProductAndFile objDAL = new cProductAndFile();
     try
     {
         objDAL.LoadByPrimaryKey(ID);
         objDAL.MarkAsDeleted();
         objDAL.Save();
         nResult = ID;
     }
     catch
     {
         nResult = 0;
     }
     return nResult;
 }
 public int Update(int ID)
 {
     int nResult = 0;
     cProductAndFile objInfor = new cProductAndFile();
     try
     {
         objInfor.LoadByPrimaryKey(ID);
         this.MappingData(objInfor);
         objInfor.Save();
         nResult = ID;
     }
     catch
     {
         nResult = 0;
     }
     return nResult;
 }
 public void LoadById(int ID)
 {
     cProductAndFile objDAL = new cProductAndFile();
     objDAL.LoadByPrimaryKey(ID);
     ConvertData(objDAL);
 }