Problem with Hyperlink in Repeater Control - asp.net

Question

<asp:Repeater ID="Repeater1" runat="server">
<ItemTemplate>
<li class="closed" >
<asp:HyperLink runat="server" CssClass="toggler off"
ImageUrl="/_layouts/images/NEXT.GIF"
Text="<%#Container.DataItem%>" ID="HyperLink1">
</asp:HyperLink>
</li>
</ItemTemplate>
</asp:Repeater>
I want to get the text in the hyperlink from the arraylist
in my ascx code
I am trying to do this bt its showing error
HyperLink hypl = (HyperLink)Repeater1.FindControl("HyperLink1");
hypl.Text = ar.ToString();
hypl.NavigateUrl = "http//www.yahoo.com";
Anyone is having idea how to resolve this problem

Answer 1

With a repeater control, you can't use FindControl to locate the hyperlink by name because there can be more than one (this is a template, and it gets rendered 0 to n times).
You need to do the assignment of values to the hyperlink multiple times, once for each item that is bound. This is a job for the repeater's ItemDataBound event. Try something like this:
<asp:Repeater ID="Repeater1" runat="server" onitemdatabound="Repeater1_ItemDataBound">
<ItemTemplate>
<li class="closed" >
<asp:HyperLink runat="server" CssClass="toggler off"
ImageUrl="/_layouts/images/NEXT.GIF"
Text="<%#Container.DataItem%>" ID="HyperLink1">
</asp:HyperLink>
</li>
</ItemTemplate>
</asp:Repeater>
Then you need to handle the event like so:
protected void Repeater1_ItemDataBound(object sender, RepeaterItemEventArgs e)
{
HyperLink hypl = (HyperLink)e.Item.FindControl("HyperLink1");
hypl.Text = ar.ToString();
hypl.NavigateUrl = "http//www.yahoo.com";
}