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I want to set selected item from dropdown to Session in MVC5 ,so that it can be used anywhere in the application for the current user, Kindly let me know is there any other workaround?

What I have tried:

@Html.DropDownList("CompanyList", ViewBag.CompanyList as SelectList,
"Select a Company", new { id = "CompanyId" })

<input type="button" value="Go" id="btnSelect"
@section scripts
function ()
var value = document.getElementById("CompanyId").value;
alert( "Session "+ @Context.Session["CompanyId"].ToString());

but this returns expression being session points to NUll
F-ES Sitecore 22-Mar-16 7:05am
You have to send the data to your server code to store it in the session. Do this in the controller when the form is submitted, or if it's not part of a form submission then make an ajax call to a controller to set the value in the session. Google "jquery ajax call mvc" for more info, or you can use the built-in ajax helper if you're using unobtrusive javascript.

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