ExtJS var passing to method in diff class controller

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C#

ASP.NET

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MVC

ExtJS

I currently have a ExtJS class with a combo box. I have the combobox selection saved to a variable. I want to retrieve this variable in a method in a controller on a different class.

   formatStyleSelected = !Ext.getCmp("FormatId").value ? 0 :Ext.getCmp("FormatId").value;

document.getElementById("formatStyleSelected").setAttribute("value",formatStyleSelected);
document.forms["spreadsheetForm"].submit();

I want to see this info in this method

[HttpPost]
        [Authorize(Roles = RoleAdmin + "," + RoleBilling + "," + RoleBillingDocument)]
        public ActionResult GenerateTripLog(int driverId, int vehicleId, int typeId, int customerId, DateTime sDate, DateTime eDate)