How can we read or get jquery session timeout from web.config so that we can handle session expiration in mvc

Question

How to get session value from webconfig via ajax call

I tried the following code

<script language="javascript" type="text/javascript">
       var sessionTimeoutWarning = 
    "<%= System.Configuration.ConfigurationSettings.AppSettings
    ["SessionWarning"].ToString()%>";
        var sessionTimeout = "<%= Session.Timeout %>";

        var sTimeout = parseInt(sessionTimeoutWarning) * 60 * 1000;
        setTimeout('SessionWarning()', sTimeout);

        function SessionWarning() {
var message = "Your session will expire in another " + 
    (parseInt(sessionTimeout) - parseInt(sessionTimeoutWarning)) + 
    " mins! Please Save the data before the session expires";
alert(message);
        }
</script>

Answer 1

You actually do it in MVC; You may need to use syntax for this "@". Please try this, it may be useful.

 <script language="javascript" type="text/javascript">
     var sessionTimeoutWarning =    @System.Configuration.ConfigurationSettings.AppSettings["SessionWarning"].ToString();
     var sessionTimeout = @Session.Timeout;    
     var sTimeout = parseInt(sessionTimeoutWarning) * 60 * 1000;
        setTimeout('SessionWarning()', sTimeout);

   function SessionWarning() {
     var message = "Your session will expire in another " + (parseInt(sessionTimeout) - parseInt(sessionTimeoutWarning)) + 
                   " mins! Please Save the data before the session expires";
     alert(message);
   }
</script>

Answer 2

Step 1. Create an ActionMethod / Function in the controller

public string IsUserLoggedIn()
        {
            if (Session["UserId"] != null) // check session here
                return "true";
            else
                return "false";
        }

Step 2: Create an ajax call. if returns true, then the user is not registered otherwise.

function IsUserLoggedIn() {
        var lsValue = true;
        $.ajax({
            type: "Post",
            url: "IsUserLoggedIn",
            datatype: "json",
            async: false,
            success: function (foData) {
                if (foData == "true")
                    lsValue = true;
                else
                    lsValue = false;
            },
            error: function (xhr, ajaxOptions, thrownError) {
            },
            complete: function (e) {
            }
        });
        return lsValue;
    }