Retrieve the value from a classic ASP page using an if statement and pass it to

Currently, I am attempting to assign a JavaScript value through ASP.

foo('RequestMode', '<%=Request.Querystring("Mode")%>')

My goal is to achieve something along the lines of:

foo('RequestMode', '<%=if (Request.Querystring("Mode")="") then 
                            Session("RequestMode")=""
                       else
                            Request.Querystring("Mode")
                       end if%>')

Whenever I attempt to use the opening tag

<%=

I encounter an error stating

'If' operator requires either two or three operands.

On the contrary, if I opt for the opening tag 

<&

A different error appears:

Property access must assign to the property or use its value.

Request.Querystring("Mode") <--- highlighted

This leads me to believe that my code itself isn't flawed. How can I successfully complete my task?

javascriptasp-classic

Answer №1

To troubleshoot, consider the issue is with the <%= tag used in your if statement. Instead of executing the VBScript, it is directly displaying the if statement on the webpage. Make sure to use:

<%= %>

This is similar to:

<% Response.Write() %>

Therefore, modify your code like this:

foo('RequestMode', '<% if (Request.Querystring("Mode")="") then %> 
                        <%= Session("RequestMode")="" %>
                   <% else %>
                        <%= Request.Querystring("Mode") %>
                   <% end if%>')

In addition, there seems to be a potential error where:

<%= Session("RequestMode")="" %>

Should either be:

<%= Session("RequestMode") %>

or

<% Session("RequestMode")="" %>

or

<%= Session("RequestMode") %>
<% Session("RequestMode")="" %>

or

<% Session("RequestMode")="" %>
<%= Session("RequestMode") %>

Note:

If you encounter the "Property access must assign to the property or use its value" error after changing from <%= to <% in your code, ensure that you are properly processing the variable value without any omissions.

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