I want to show certain parts of an ItemTemplate
based according to whether a bound field is null. Take for example the following code:
(Code such as LayoutTemplate have been removed for brevity)
<asp:ListView ID="MusicList" runat="server">
<ItemTemplate>
<tr>
<%
if (Eval("DownloadLink") != null)
{
%>
<td>
<a href="<%#Eval("DownloadLink") %>">Link</a>
</td>
<%
} %>
</tr>
</ItemTemplate>
</asp:ListView>
The above gives the following run-time error:
Databinding methods such as Eval(), XPath(), and Bind() can only be used in the context of a databound control.
So how can put some conditional logic (like the above) in an ItemTemplate
?
What about binding the "Visible" property of a control to your condition? Something like:
<asp:ListView ID="MusicList" runat="server">
<ItemTemplate>
<tr runat="server" Visible='<%# Eval("DownloadLink") != null %>'>
<td>
<a href='<%#Eval("DownloadLink") %>'>Link</a>
</td>
</tr>
</ItemTemplate>
</asp:ListView>