Question

I have my script.js into the folder script.
I’d like to manage, into that script, some C# variable, from a Web Form (e.g. <%= myString = 3 %>).

I think this is not possible, but maybe can I do it in some way? Thank you

Answer 1

Javascript is client side executed code, and C# is server side executed code. So you can’t strictly make a “variable” visible, as they’re two completely different code platforms/runtimes, running on two different computers. However you can still marshal the data between them in a few different ways.

• Write a web service and call it via AJAX
• Populate a control or your URL for your page with your data, and query it via the Javascript DOM API (or via some wrapper library like jQuery)

An example of the 2nd (since you asked):

<!-- Somewhere in your page -->
<span style="visibility:hidden" id="myData"><%= myString %></span>

// In Javascript, using jQuery:
var myData = $('#myData').text();