Updating in ASP.NET with sub-objects

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  1. Sharbel Lutfallah
    Sharbel Lutfallah avatar
    26 posts
    Member since:
    Feb 2006

    Posted 15 Jan 2009 Link to this post

    Does anyone know the best way to update an object that is being accessed at the ASP.NET page level through a BLL which in turn gets it from OA's datalayer?  To complicate the question, how best should I handle setting a sub-object of the update object?  So, if I have a Product object, and I have a subobject of Category type... i change the category to another one, usually I would just chang e the categoryID in the stored proc, but now it seems I have to get the whole object? (seems like a lot of round trips!)

    Please comment on my whole updating process... it seems like a lot of manual setting of properties for nothing:

    This is the test method at the page level:

    protected void cmdTest_Click(object sender, EventArgs e) 
                JobRequirementParameter p = JobRequirementParameterUtility.GetByID(1); 
                p.JobDemandItem = JobDemandItemUtility.GetByID(2);//I have to make a round trip to get the demand object?? 
                p.JobRequirementItem = JobRequirementUtility.GetByID(1); // I have to make a roundtrip here too? 
                p.Description = "sometext"
                p.Code = "@code"
                p.DataTypeID = 1; 

    This is the BLL method that updates.. as you can see, i am setting the values of the parameters again in the BLL because otherwise i get runtime-errors from OA.

    public static bool Update(JobRequirementParameter c) 
                using (IObjectScope scope = Scope.GetNewObjectScope()) 
                    var b = (from cc in scope.Extent<JobRequirementParameter>() 
                             where cc.ParameterID == c.ParameterID 
                             select cc).Single(); 
                    if (b != null
                        JobRequirementParameter bn = (JobRequirementParameter)b; 
                        b.Code = c.Code; 
                        b.DataTypeID = c.DataTypeID; 
                        b.Description = c.Description; 
                        var demandItem = (from d in scope.Extent<JobDemandItem>() 
                                         where d.DemandID==c.JobDemandItem.DemandID 
                                         select d).SingleOrDefault(); //Another round trip??????
                        b.JobDemandItem = demandItem; 
                        //b.JobRequirementItem = c.JobRequirementItem; (commented out for now)
                        b.Title = c.Title; 
                        return true
                        return false

    Keeping in mind that the CRUD examples in the KB article that I read, are simplistic examples that do not pass the object to a BLL, and do not deal with sub-objects, is this the 'right' way to do it?  Again, it seems like a heck of a lot of manual setting of properties.

    Any help would be greatly appreciated!!

  2. Alexander
    Alexander avatar
    727 posts

    Posted 19 Jan 2009 Link to this post

    Hi Sharbel Lutfallah,

    I think we addressed similar problem with the BLL methods in our previous conversation (TicketID: 184814). As for the sub-objects, they are being updated the same way as others. If you have any further questions, do not hesitate to contact us.

    All the best,
    the Telerik team

    Check out Telerik Trainer, the state of the art learning tool for Telerik products.
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