How do I access a c# variable's value in an .aspx page?

Question

The Controls collection cannot be modified because the control contains code blocks (i.e. <% ... %>).

we need to access the c# variable in .aspx page at the time

Answer 1

Declare C# code behind variable either public or protected and then us it in <% %> block. e.g. <%= strMyCodebehindvariable%> or <%# strMyCodebehindvariable%>. If you are using second option then you must call DataBind() method in page load.