ListView selected index - asp.net-4.0

Question

I have a paged multicolumn ListView of items with ImageButton and LinkButton. The delete and select commands are working. I can't get the SelectedIndexChanging event to fire, and the SelectedIndex is always -1 in the Select command handler. I think I have the required select button as per the docs. My ultimate goal is to save the index of the item so when I return to the page I can restore the current ListView pager page so the selected item is visible. But I can't get the item index. This is for asp.net 4.0 webforms.
<asp:ListView ID="ListView1" runat="server" OnItemDataBound="ListView1_ItemDataBound"
DataKeyNames="ItemID" DataSourceID="ObjectDataSource1"
OnItemCommand="ListView1_ItemCommand" GroupItemCount="2"
onselectedindexchanging="ListView1_SelectedIndexChanging">
<LayoutTemplate>
<table width="100%">
<tr>
<td>
<table class="sample" width="100%">
<asp:PlaceHolder runat="server" ID="groupPlaceHolder"></asp:PlaceHolder>
</table>
</td>
</tr>
</table>
</LayoutTemplate>
<GroupTemplate>
<tr>
<asp:PlaceHolder runat="server" ID="itemPlaceHolder"></asp:PlaceHolder>
</tr>
</GroupTemplate>
<ItemTemplate>
<td>
<asp:ImageButton ID="btnDelete" ToolTip="Delete" runat="server" CommandArgument='<%# DataBinder.Eval(Container.DataItem, "ItemID")%>' CommandName="DeleteItem" Height="12" ImageUrl="resources/delete.gif" Width="12" />
<asp:LinkButton ID="btnSelect" runat="server" CommandName="Select" CommandArgument='<%# DataBinder.Eval(Container.DataItem, "ItemID")%>'><%# DataBinder.Eval(Container.DataItem, "ItemName") %></asp:LinkButton>
<asp:Label ID="ccLabel" runat="server"></asp:Label>
</td>
</ItemTemplate>
</asp:ListView>

Answer 1

It would help if you posted your code (SelectedIndexChanging). But in any case, one thought:
SelectedIndexChanging won't give you the selected index, because the index hasn't actually been selected yet.
Use SelectedIndexChanged instead. This occurs after the index has been selected, so can give you a value.