I have a list view with a HyperLink control within the ItemTemplate. I want to display the link if a returned value is 0 (false), and not display the link if it is 1 (true).
So far I have this:
<asp:HyperLink runat="server" ID="lnkReview"
NavigateUrl='<%# Eval("EnquiryID", @"selectcompany.aspx?enq={0}")%>'
Text="Review Enquiry"
Visible='<%# ((bool)Eval("Locked"))==true? false : true %>' />
...but this renders an 'Specified cast is not valid' exception.
Examples I've seen elsewhere suugest this should work. I can confirm that the Locked column only returns 0 or 1 (from SQL Server) - surely these should be easily cast from bit/int to bool??
If Locked is an int you should do this:
<%# ((int)Eval("Locked")) == 1 ? true : false %>
But then this should work too, so it returns true when Locked > 0
<%# !((int)Eval("Locked") == 0) %>
No matter it is mentioned that Locked contains 0 or 1. It is still an INT which can for some reason contain values > 1. Therefore i find it good practice to do the check on == 0 instead of == 1. We don't know what Locked is used for and in the future the design could change so that Locked can contain a value > 1.