PanelBar Load on demand with grid

[Sunny]

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]

Hi TelNew,

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

Regards,
Paul
the Telerik team

Instantly find answers to your questions on the new Telerik Support Portal.
Watch a video on how to optimize your support resource searches and check out more tips on the blogs.

[Sunny]

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]

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?