how to call split method on designtime binding value

Hi all I have a grid with some templatecolumn , now i want to bind to on object property. one of these property is a string type that i w开发者_C百科ant split it in design time. my code is here, but i have error. i know my code is wrong. please help me if any one know the right option to do this.

 <telerik:GridTemplateColumn DataField="FilePath" UniqueName="FilePath" HeaderText="نام فایل" >
                <ItemTemplate>
                    <%#DataBinder.Eval(Container.DataItem,"FilePath.Split('-').Last();")%>
                </ItemTemplate>
            </telerik:GridTemplateColumn>

You need to cast our Eval's expression to a type of string and then call Split method:

<ItemTemplate>
    <%# ((string)Eval(FilePath)).Split('-').Last() %>
</ItemTemplate>