Question

I would like to insert the value from Request.QueryString["u"] as a second parameter in the url below. So that the url read Item.aspx?id=1&u=2. But I can’t get two server side tags to work within the NavigateUrl value field.

<asp:HyperLink runat="server" 
               NavigateUrl='<%# Eval("itemID", "Item.aspx?id={0}") %>' /> 

I got errors doing it like this:

<asp:HyperLink runat="server" 
               NavigateUrl='<%# Eval("itemID", "Item.aspx?id={0}") %>
               <%= "&u="+Request.QueryString["u"].ToString() %>' 
/>

Answer 1

Try out following, not sure about syntax because can’t check it now:

NavigateUrl='<%# String.Format(
                    "Item.aspx?id={0}{1}", 
                    Eval("itemID"), 
                    Request.QueryString["u"] == null
                    ? String.Empty
                    : String.Concat("&u=", Request.QueryString["u"].ToString())); %>'