Spreadsheet - How to access an active sheet in the Controller

Hi

I would like to access the active sheet of the current document (ASP.NET - MVC - cshtml) in the View. I have been trying to use the following code:

JavaScript
function ChangeCellValue(s, e) {  
         $.ajax({  
            url: '@Url.Action("Test", "Home")',  

            //How do I get access to the activeSheet here ?  

           data: { activeCellColumnIndex: s.GetSelection().activeCellColumnIndex, activeCellRowIndex: s.GetSelection().activeCellRowIndex },  

            contentType : 'application/html; charset=utf-8' ,  
            dataType: "text",  
            traditional: true,  
            success: function (result) {  
                  alert(result);  
            },  

        });  

    }  

C#
@Html.DevExpress().Spreadsheet(  
    settings =>  
    {  
        settings.Name = "Spreadsheet";  
        settings.CallbackRouteValues = new { Controller = "SpreadsheetAPI", Action = "CellValuePartial" };  
        settings.Width = Unit.Percentage(100);  
        settings.Height = 475;  
        settings.ActiveTabIndex = 0;  
        settings.EnableClientSideAPI = true;  


        settings.PreRender = (s, e) =>  
        {  

            MVCxSpreadsheet spreadsheet = (MVCxSpreadsheet)s;  
            DXWebApplication2.Controllers.CellValueDemoHelper.PrepareWorksheet(spreadsheet.Document.Worksheets[0]);  

        };  
         settings.ClientSideEvents.SelectionChanged = "ChangeCellValue"  


    }  

).GetHtml()  


  public ActionResult Test(int activeCellColumnIndex, int activeCellRowIndex  )  
        {  
            System.Diagnostics.Debug.WriteLine(SelRange);  


            string str = "activeCellColumnIndex = " + activeCellColumnIndex + "activeCellRowIndex = " + activeCellRowIndex ;  

            return Content(str);  
        }  

Basically I am trying to get the current selection (client-side) of the active sheet as a Range data type. I want to access the selected range (multiple cells) similar to the following:

worksheet.Cells["B5"].

so that I can perform custom actions on the selected range.

For this, I require :

1. Access to the client-side selected range as a Range datatype (of devexpress.spreadsheet) in the controller.
   OR
   2.Access to the active sheet in the controller.

Many thanks,
Sunaina