MVC application, set session variables then open asp.net popup - asp.net-mvc

Question

I'm wondering if it is possible to achieve the following.
Within an MVC application -
Have a link which queries a database for some values, sets those values as session variables and then opens a pop-up window(which is an asp.net webform within the MVC app)
It's basically to allow us to run Crystal Reports, the link would set the Report ID in a session variable which would then be accessible in the asp.net webform.
My confusion is the setting of the session variable on click of the link and then opening the popup.
Can it be done and if so any links or pointers?
Edit:
Javascript
<script language="javascript" type="text/javascript">
function flagInappropriate(postId) {
var url = "/Home/FlagAsInappropriate/" + postId;
$.post(url, function(data) {
if (data) {
alert("True")
} else {
// callback to show error/permission
}
});
}
Controller
namespace MvcApplication1.Controllers
{
[HandleError]
public class HomeController : Controller
{
[AcceptVerbs("POST")]
public bool FlagAsInappropriate(int id)
{
// check permission
bool allow = true;
// if allow then flag post
if (allow)
{
// flag post
return true;
}
else
{
return false;
}
}
public ActionResult Index()
{
ViewData["Message"] = "Welcome to ASP.NET MVC!";
return View();
}
public ActionResult About()
{
return View();
}
}
}

Answer 1

It can be done, yes. I've achieved something similar for the purposes of generating reports (predominantly so the report URL is hidden from the user and so some tracking and authentication could be achieved using once-off tokens). My solution was as follows:
Perform an AJAX call to a Web Method in your application to set the relevant session variable(s).
Return a value from the Web Method to indicate whether it was successful.
For the "success" event handler of the AJAX call, open your relevant ASPX page to generate the report.
Simple as that. :)
Here's some sample code to attach the click event and do the AJAX call, based on your amended question:
Click to test AJAX call
<script type="text/javascript">
$(document).ready(function () {
$(".flag").click(function () {
flagInappropriate($(this).attr("id").split("-")[1]);
});
});
function flagInappropriate(postId) {
var url = "/Home/FlagAsInappropriate/" + postId;
alert(url);
$.post(url, function (data) {
if (data) {
alert(data);
} else {
// callback to show error/permission
}
});
}
</script>