将JavaScript的URL查询字符串值编码为ASP.NET MVC

Question

I have an app that uses ASP.NET MVC and JavaScript. I am generating a URL in my JavaScript like this:

// Imagine 'filter' is "AT&T".
var v = filter.replace(/'/g, "''");
v = v.replace(/&/g, "%26%");
var t = "(clause eq '" + v + "')";

// At this point, t is "(clause eq 'AT%26%T')"
window.location = '@Url.Content("~/find?")' + 'q=' + t;

In my ASP.NET MVC controller action, I have the following:

public ActionResult Find(int? id, string q)
{
  // do stuff
}

If I set a breakpoint in the Find action, I notice that q is the following:

(clause  eq 'AT&%T')

I'm not sure why. I need it to be (clause eq 'AT%26%T') . What am I doing wrong? I understand its some encoding issue.

Answer 1

The reason for this is that your encoded ampersand %26 is UrlDecoded serverside back to & . If you want to keep the url encoded version you need to escape the percent sign % too with its encoded equivalent %25 :

v = v.replace(/&/g, "%2526%");