Call Javascript Function before Razor calls my HTML Helper

Question

I've been working on a HTML helper which will hide or show menu items depending on what type of user you are.

For this reason, In one of my controllers I am setting a session variables with values such as "ADMIN"

context.Session["perfil"] = "ADMIN"

The problem I am facing is that the Helper function is being called before the Javascript function which calls the controller that sets the session variables

This is how I call my HtmlHelper (through Razor)

 @using XSiteManagerWeb.Helpers
 @Html.Raw(Html.MiMenu("../Home/Configuracion", "Configuración"))

From my _Layout.cshtml

But before doing that I'm calling the function

 <script type="text/javascript">ObtenerDatosSesion();</script>

Which calls a Controler method through Ajax

...
$.ajax({
        url: "../Home/ObtenerDatosSesion",
....

Question: Why is the HtmlHelper being called before ObtenerDatosSesion(); even though I've put it before on the _Layout.cshtml ?

I've also tried calling in on window load doing this:

<body class="Fondoblue" onload="ObtenerDatosSesion();">

among other methods.

I noticed the Helper is being called before everytime after many debuggings. What I can't figure out is why that happens.

I wonder if it has anything to do with the Web.config line one has to put to use html helpers

<add namespace="XSiteManagerWeb.Helpers"/>

So to make it clear, I just want to make my "ObtenerDatosSesion(); method gets called before my html helper!

Matt Millican Matt Millican · Accepted Answer · 2015-03-31T16:50:11

The razor helpers are executed server side, therefore they will be executed before any JS is rendered/executed on the page.

I would recommend moving whatever logic is in your ../Home/ObtenerDatosSesion endpoint to the same endpoint as ../Home/Configuracion. If it's going to be called more than once, you can put it in its own method.

Call Javascript Function before Razor calls my HTML Helper

1 Answers