How get root url path

Question

I'm searching a way to get the root URL of my Web project; as example:

Local:

http://localhost:52390/pages/user.aspx

Expected result: http://localhost:52390

IIS:

http://lst.pg.com/iLearn/pages/user.aspx

Expected result: http://lst.pg.com/iLearn

Exists a way to achieve this in ASPX? Or in Javascript/jQuery?

Answer 1

in javascript you can get url information from the location object.

var href = location.href; //returns the entire url
var host = location.hostname; //returns just the hostname of the url.

Answer 2

ASPX: Request.Url.GetLeftPart(UriPartial.Authority) + Request.ApplicationPath

Implemented with Javascript:

<script type="text/javascript">
    var rootUrl = '<% =(Request.Url.GetLeftPart(UriPartial.Authority) + Request.ApplicationPath) %>';
</script>