Question

I’m trying to create a pager in ASP.net and am running into an error.

Trying to do this in my markup:

<div class="pager">
<% foreach(int pageNumber in this.PageCollection) { %>
    <% if( pageNumber == this.PageIndex ) { %>
        <span class="current"><%= pageNumber %></span>
    <% } else { %>
        <asp:LinkButton ID="lnkGoToPage" runat="server" OnClick="lnkGoToPage_Click"><%= pageNumber %></asp:LinkButton>
    <% } %>
<% } %>

I am getting the following error:

Compiler Error Message: CS0103: The name 'pageNumber' does not exist in the current context

The error is happening on the LinkButton line. It works fine on the first if case…but for some reason my variable does not exist on the else case.

Does anyone have any idea why this is not compiling or how I could do the same thing differently.

It’s been a while since I have done regular ASP.net and I am used to the MVC way.

Answer 1

You can’t place <%= pageNumber %> inside a LinkButton.

Alternatively, use the Repeater control and the OnItemDataBound event to add logic such as pageNumber == this.PageIndex in the code behind.

<asp:Repeater ID="Pager" runat="server">
    <ItemTemplate>
        <asp:Literal ID="ltlGoToPage" runat="server" Visible="false"></asp:Literal>
        <asp:LinkButton ID="lnkGoToPage" runat="server" OnClick="lnkGoToPage_Click" Visible="false"></asp:LinkButton>
    </ItemTemplate>
</asp:Repeater>

You can toggle the visibilty of the controls in the OnItemDataBound event.

In the code behind, reference the controls and apply any logic:

var ltlGoToPage = (Literal)e.Item.FindControl("ltlGoToPage");
var lnkGoToPage = (Literal)e.Item.FindControl("lnkGoToPage");