PanelBar Load on demand with grid in UI for ASP.NET AJAX PanelBar

Sunny

31 posts

Member since:
Aug 2009

Posted 26 Oct 2009 Link to this post

Hi,

I have RadPanelbar (populating from database) and inside each panelbar item I am loading a radgrid (which is in usercontrol) with unique parameters for each panelbar item. The Grid contains few hundred records, and I am using radwindow to insert/edit items in the radgrid.

In this case, How can I improve the performance for the Panelbar with load on demand feature?

I found http://www.telerik.com/community/forums/aspnet-ajax/panelbar/radpanelbar-with-load-on-demand-items.aspx, Is this the only way?

Thanks

Paul

Admin

4281 posts

Posted 26 Oct 2009 Link to this post

Hi TelNew,

Yes, this is what we would suggest to use for this case.

Regards,
Paul
the Telerik team

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Sunny

31 posts

Member since:
Aug 2009

Posted 26 Oct 2009 Link to this post

Paul,

Thanks for immediate response. But the sample loading user control, based on panelbar text.

In my case, in aspx page load I am (see code below).

SomeControl.ascx contains a Self-Referencing Hierarchical RadGrid which populates data based on value from RadPanel (e.Item.Value)

                    Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load         
            RadPanelBar2.ExpandMode = PanelBarExpandMode.FullExpandedItem         
            RadPanelBar2.DataFieldID = ""         
            RadPanelBar2.DataFieldParentID = "ID1"         
            RadPanelBar2.DataTextField = "Name"         
            RadPanelBar2.DataValueField = "Text"         
            RadPanelBar2.DataSource = MyDS         
            RadPanelBar2.DataBind()         
            If Not Page.IsPostBack Then         
                RadPanelBar2.Items(0).Expanded = True         
            End If         
            End Sub         
                     
                     
            Private Sub RadPanelBar2_ItemDataBound(ByVal sender As Object, ByVal e As Telerik.Web.UI.RadPanelBarEventArgs) Handles RadPanelBar2.ItemDataBound         
            Dim radPnlItem As New RadPanelItem         
            Dim smControl As SomeControl         
            smControl = CType(LoadControl("MyControls/SomeControl.ascx"), SomeControl)         
            smControl.MyID = e.Item.Value 'Here I am passing value which is from Database         
            radPnlItem.Controls.Add(smControl)         
            e.Item.Items.Add(radPnlItem)         
            End Sub         

Sunny

31 posts

Member since:
Aug 2009

Posted 29 Oct 2009 Link to this post

I am implementing PanelBar Load on demand code (which in the link - firstpost). I am loading user control only when panelitem is selected.

Question: When the user goes back to the panelitem which he/she has already expanded few min. ago.. How to avoid executing (calling db or loadcontrol call) code again?