Inherit from RadPanelBarEventArgs

[Richard]

I'm trying to add some extended properties to a RadPanelItem like so:

Public Class RadPanelItemExtended
Inherits Telerik.Web.UI.RadPanelItem
Private _HasChildren As Boolean
Public Property HasChildren() As Boolean
Get
Return _HasChildren
End Get
Set(ByVal value As Boolean)
_HasChildren = value
End Set
End Property
End Class

To access the extended properties on RadPanelBar.ItemClick i need to make the RadPanelBarEventArgs handle RadPanelItemExtended class rather than RadPanelItem class. I thought this was possible through creating an extended eventargs class like so:

 

Public Class RadPanelBarEventArgsExtended
Inherits Telerik.Web.UI.RadPanelBarEventArgs

Private _RadPanelItemExtended As RadPanelItemExtended
Public Property RadPanelItemExtended() As RadPanelItemExtended
Get
Return _RadPanelItemExtended
End Get
Set(ByVal value As RadPanelItemExtended)
_RadPanelItemExtended = value
End Set
End Property

Sub New(ByVal item As RadPanelItemExtended)
MyBase.New(item)
Me._RadPanelItemExtended = item
End Sub

When using these extended classes like this:

Protected Sub RadPanelBar_ItemClick(ByVal sender As Object, ByVal e As RadPanelBarEventArgsExtended) Handles RadPanelBar.ItemClick

End Sub

I get the following error:
Unable to cast object of type 'Telerik.Web.UI.RadPanelBarEventArgs' to type 'RadPanelBarEventArgsExtended'.

Why is this?

Regards
Richard

[Richard]

Has anyone had time to look into this yet?

Regards Richard

[Peter]

Hello Richard,

You might also need to extend the RadPanelBar because of its ItemClick delegate.

I wonder if you can use a simpler approach - you can easily create a method that checks if an item has children and use it when needed. Are there any specific reasons why you cannot use this method?

Best wishes,
Peter
the Telerik team