Question

sp db updates data access or business logic?

Asked by: Fraser_Admin

I have a .Net 2008 web site in which i have split up my business logic and data access.  My data access is currently only for selection.  I want to have all update/insert/delete performed against db done from a stored procedure.  So I will need to call this sp from within the ap.  Right now I have it in my business logic area and not in data access.  How do I go about calling a sp from data access or am I even suppose to put it there.  A lot of examples i see out there are updating against the adapter which from what i see is direct access to the table.

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Asked On
2009-09-17 at 11:04:35ID24740828
Topics

.NET

,

.NET Framework 3.x versions

,

Programming for ASP.NET

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Answers

 

by: daveamourPosted on 2009-09-18 at 00:06:00ID: 25363398

I would do it like this - using an example to explain

Users edits record on web form (aspx page) and clicks submit

Code behind on web form creates instance of record which lives in the business tier, sets properties and calls Save.  The business tier record object then calls Save against some code in the data access tier which talks to the database via the stored procedure.

Web app has reference to Business tier

Business tier has reference to Data Access tier

Does that help?

 

by: Fraser_AdminPosted on 2009-09-21 at 07:13:07ID: 25383009

I don't see a spot in my data access tier to set a sp....i must be missing something.

right now i'm directly calling sp from my business tier, but i think it should be moved.  

 

by: Fraser_AdminPosted on 2009-09-22 at 05:00:30ID: 25391752

all i see in the DAL is to use sp to select data.  can you direct me to a good tutorial on how to use sp to update data  using these 3 levels.  eveything i see shows doing it directly on the table.

 

by: daveamourPosted on 2009-09-22 at 05:04:01ID: 25391774

In order to direct you to a good tutorial, I would have to read and evaluate some but don't have time to do that I'm afraid.

Perhaps a good way is to have a go yourself and I can guide you step by step if you like?

 

by: Fraser_AdminPosted on 2009-09-22 at 05:09:19ID: 25391810

well i'm in my data access layer now.  i have all my direct table access queries setup (ie. getallvalues(), getvaluesbyid(id), getvaluesbygroupingid(groupingid).

inside my BLL I access these to select data.

then from my web form i access the BLL, so 3 tier, working fine.

now currently in my BLL i have an update procedure setup beginning with the following code:
<System.ComponentModel.DataObjectMethodAttribute(System.ComponentModel.DataObjectMethodType.Update, True)> _

So when i make a call to this procedure, it knows its an update one.

This is where i am currently executing my sp...code attached below...

What i'm wondering is if this is the right place to be doing this.  I thought the actual update was suppose to take place in the DAL and not the BLL, but i don't see a way to make this work.

I understand that the DAL is returning an sqladapter, so in the normal case when you do a .Update it is going back to the table.  but is there a way to do a .Update in my case or is this the way to do it.

Hope this makes sense, I'm new to this and just getting my feet wet!!

<System.ComponentModel.DataObjectMethodAttribute(System.ComponentModel.DataObjectMethodType.Update, True)> _
    Public Function UpdateProductCategoryFamily(ByVal Product_Category_Family_Name As String, ByVal Product_Category_Family_Name_French As String, ByVal Product_Category_Family_ID As Integer, ByVal Product_Category_ID As Integer, ByVal Master_ID As String) As Boolean
        Dim con As New SqlConnection(SQL_GetServerConnectionString.GetConnectionString)
        Dim up As String = "Update_Lookup_Product_Category_Family"
        Dim cmd As New SqlCommand(up, con)
        cmd.CommandType = CommandType.StoredProcedure
 
        cmd.Parameters.AddWithValue("@Product_Category_Family_Name", Product_Category_Family_Name)
        cmd.Parameters.AddWithValue("@Product_Category_Family_Name_French", Product_Category_Family_Name_French)
        cmd.Parameters.AddWithValue("@Product_Category_Family_ID", Product_Category_Family_ID).SqlDbType = SqlDbType.Int
        cmd.Parameters.AddWithValue("@Master_ID", Master_ID)
 
        con.Open()
        Dim RecordCount As Integer = cmd.ExecuteNonQuery()
        con.Close()
 
        If RecordCount = 1 Then
            UpdateProductCategoryFamily = True
        Else
            UpdateProductCategoryFamily = False
        End If
 
    End Function

                                              
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by: daveamourPosted on 2009-09-22 at 05:11:20ID: 25391828

Are you using an ObjectDataSource?

 

by: Fraser_AdminPosted on 2009-09-22 at 05:15:50ID: 25391859

yes

 

by: Fraser_AdminPosted on 2009-09-22 at 05:16:14ID: 25391865

objectdatasource that references my BLL

 

by: daveamourPosted on 2009-09-22 at 05:19:09ID: 25391882

Right thought so

I have never used an Object Data Source I'm afraid as I prefer to code by hand so cannot help much I'm afraid.

 

by: Fraser_AdminPosted on 2009-09-22 at 07:50:42ID: 25393455

for anyone else with the same problem .. found a good site..

http://www.asp.net/Learn/data-access/tutorial-67-vb.aspx

20120131-EE-VQP-002

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