Getting QueryString from Request or Javascript

Question

In aspx I have a querystring - www.mysite.com/enter.aspx?dest=#. When I click "enter" I go to main.aspx. I want to get this "?dest=#" in main.aspx with a request.querystring or something in javascript. I need to use the querystring in javascript in main.aspx for another action.

Any ideas?

let me explain in detail - I have enter.aspx page that shall load with a querystring - www.mysite.com/enter.aspx?dest=#. Now when i click the Enter button on Enter.aspx page, it shall goto Main.aspx page. When main.aspx page loads i want to write small javascript in main.aspx that shall get the querystring from the previous enter.aspx page and give it an if condition. so if (request.querystring('dest=') > 0 window.open ('a1.jpg') this above code needs to be redesigned so it can work. how can i do this. i tried window.location.href.indexof('dest') , nothing happened.

Answer 1

To get the current address in javascript you could use window.location.href and test if it contains a given string:

<script type="text/javascript">
if (window.location.href.indexOf('dest=') > 0) {
    window.open('images/newyork.jpg','','') 
}
</script>

Answer 2

Yes. You can read the querystring from JavaScript. Here are some links to get you started:

• http://javascript.about.com/library/blqs1.htm
• http://ilovethecode.com/Javascript/Javascript-Tutorials-How_To-Easy/Get_Query_String_Using_Javascript.shtml
• http://geekswithblogs.net/dotNETvinz/archive/2009/04/14/passing-and-retrieving-querystring-using-javascript-in-asp.net.aspx

Answer 3

alert(window.location.search); // ?dest=#

Answer 4

If you don't have to do this in Javascript, you can always grab the querystring in the codebehind of enter.aspx, then perform a Response.Redirect to main.aspx, appending on the querystring.

Answer 5

This is a bit messy.. YUI has a simple method to get at the querystring response by Gavin Brock.

http://stackoverflow.com/questions/2376517/how-do-you-get-querystring-using-yui-2

Answer 6

If you want to get the url from the previous page, you should use "document.referrer".

<script type="text/javascript">
if (document.referrer.indexOf('dest=') > 0) {
    window.open("a1.jpg");
}