Question

I am having problems setting JavaScript variables on the Server Side in ASP.Net Web Forms (Not MVC) using Master Pages.

Basically I want to do something like this:

<script type="text/javascript">
    var z = '<%# Request.QueryString["Env"] %>';
</script>

After I run the code I see: var z=’’;

I also tried:

var z = ‘<%= Request.QueryString[“Env”] %>’;

After I run that code I get the following error so I assume that is not correct:

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

I have been doing mainly MVC development these past few years so I am not sure what I am doing wrong.

Please let me know.

Thanks

Answer 1

I think it is a good idea to place the javascript just before closing the body tag instead of head tag. Then you can use <%= syntax.