Not able to use local variables in Sitecore Edit Frames

Question

@Edited after Mark's answer.

I have a ascx control where I have defined some variables.

<%
var showFilters = RenderingParameters.ShowFilters;
var minimizeCardHeight = RenderingParameters.MinimizeCardHeight;
var numberOfProfiles = 0;
%>
<sc:EditFrame ID="editContributors" runat="server" Title="Contributors Area" Buttons="/sitecore/content/Applications/WebEdit/Edit Frame Buttons/Test Button">
<div class='test'>
<% if(minimizeCardHeight) { %> 
<div class="divider"></div>
<% } %>
</div>
</sc:EditFrame>

Now, in visual studio there is no error shown for any variables but when I publish the code and run the page in Experience Editor, a compilation error is thrown

CS0103: The name 'minimizeCardHeight' does not exist in the current context

Please let me know what I am doing wrong here.

Answer 1

A number of things.

1. You cannot have the <%= inside the <sc:EditFrame> control. It will not be evaluated. <%= sends its output to the output stream, it does not act as a variable as you seem to assume. See https://stackoverflow.com/questions/370201/why-will-expressions-as-property-values-on-a-server-controls-lead-to-a-co
2. You cannot edit Rendering Parameters using an Edit Frame. See Inline editing of rendering parameters in Experience Editor for details.