Forms Data Controls :: How To Move A Detailsview Sqldatasource To Codebehind

I have working code similar to the following in my Detailsview:

<asp:SqlDataSource ID="SqlDataSource3" runat="server" ConnectionString="<%$ ConnectionStrings:DATABASE %>"
SelectCommand="SELECT Id, PracticeId, FirstName, LastName, Notes FROM Providers WHERE Id=@Id"
UpdateCommand="UPDATE Providers SET
PracticeId = @PracticeId,
FirstName = @FirstName,
LastName = @LastName,
Notes = @Notes
WHERE Id = @Id"
InsertCommand="INSERT INTO Providers (
PracticeId, FirstName, LastName, Notes
) VALUES (
@PracticeId, @FirstName, @LastName, @Notes)">
<SelectParameters>
<asp:QueryStringParameter Name="Id" QueryStringField="Id" Type="String" />
</SelectParameters>
<UpdateParameters>
<asp:Parameter Name="Id" Type="Int32" />
<asp:Parameter Name="PracticeId" Type="Int32" />
<asp:Parameter Name="FirstName" Type="String" />
<asp:Parameter Name="LastName" Type="String" />
<asp:Parameter Name="Notes" Type="String" />
</UpdateParameters>
<DeleteParameters>
<asp:Parameter Name="Id" Type="Int32" />
</DeleteParameters>
</asp:SqlDataSource>

I would like to move all of this to codebehind so it's easier to work with programmatically. For instance the PracticeId is a selection from a dropdownlist that is populated from another table... i need to determine what the current selection is first so i can display the record / bind properly.