How to access session variable from JavaScript file (.js) file?

Question

I have to access session variable from javascript file

I am using below code to access from javascript,

var sessionValue = '<%=Session["username"]%>'
            alert(sessionValue)

it is working well when the script function is placed inside the aspx page...but when I use the same code in .js file it is not working

I have seen all the related answers, nothing is useful for me, so don't mark it as duplicate

because `Session` is not available in `.js` file. It can be access from your apsx page only. — Yagnesh Agola, Dec 27 '13 at 13:30
This should help http://stackoverflow.com/questions/1343801/pass-variable-to-external-js-file — geedubb, Dec 27 '13 at 13:30
@Shahe actually you could write an `HTTPHandler` which will dynamically write the .js file — geedubb, Dec 27 '13 at 13:31

score 1 · Answer 1 · answered Dec 27 '13 at 13:31

1

i think try to write your session value to a hidden html element and read value of this hidden element with javascript as follow :

<input type="hidden" id="session" value="'<%=Session["username"]%>'">

at your js:

var sessionValue =document.getElementById("session").value;

answered Dec 27 '13 at 13:31

semirturgay

This is bad practice. Write that value into a JS variable instead to avoid polluting the DOM and the tree traversing to get the value. – Zoltan.Tamasi Dec 27 '13 at 13:47
why it is bad practice can you explain it – semirturgay Dec 27 '13 at 13:48

score 1 · Answer 2 · answered Dec 27 '13 at 13:34

1

Depends on what is your scripting languauge in server side, if it is JSP or PHP following should work.

var sessionValue = "'"+<%=Session["username"]%>+"'"
alert(sessionValue)

answered Dec 27 '13 at 13:34

WebServer

Scripting language is `aspx`(Asp.net), already mention in question. – Yagnesh Agola Dec 27 '13 at 13:41

2 Answers2