We have discovered a bug in RadSlider in Q1
2010 release (version 2010.1.309)
A server error "Specified cast is not valid.
" can occur after postback, when you have an invisible RadSlider control (either the slider, or one of its parents, has "display:none
" applied) with items, defined on the page.
As a workaround, you can execute the following code, when the RadSlider control fires its load
| function OnClientLoad(sender,args)
What is Next
|<telerik:RadSlider ID="RadSlider1" runat="server" ItemType="Item" OnClientLoad="OnClientLoad"
The problem is already fixed and the fix will be available in the next Latest
and the first service pack
Please accept our sincere apologies for the caused inconvenience.