Add "page executed" timer to all asp.net views

_Layout.cshtml

Add this to the bottom of _Layout.cshtml, just before </body>


@if (User != null && User.IsAdmin() && ViewData.ContainsKey("_ElapsedTime"))
    {
<div align="right">
    Page action processed in @ViewData["_ElapsedTime"] ms
    @if (ViewData.ContainsKey("_ActionTimer"))
    {
    <span>, total page in @((ViewData["_ActionTimer"] as System.Diagnostics.Stopwatch).ElapsedMilliseconds) ms</span>
    }
 </div>
    }

ApprovalController.cs

// make all your MVC controllers inherit this one instead of System.Web.Mvc.Controller directly

using System.Web.Mvc;
using System.Diagnostics;

public class ApprovalController : Controller
    {
        static NLog.Logger log = NLog.LogManager.GetCurrentClassLogger();
        
        protected override void OnActionExecuting(ActionExecutingContext ctx)
        {
            // Start timing
            var controller = this;
            if (controller != null)
            {
                var timer = new Stopwatch();
                controller.ViewData["_ActionTimer"] = timer;
                timer.Start();
            }


            base.OnActionExecuting(ctx);
        }

        // Called after the action is executed
        protected override void OnActionExecuted(ActionExecutedContext ctx)
        {
            base.OnActionExecuted(ctx);

            var controller = this;
            if (controller != null)
            {
                var timer = (Stopwatch)controller.ViewData["_ActionTimer"];
                if (timer != null)
                {
                    //timer.Stop();
                    controller.ViewData["_ElapsedTime"] = timer.ElapsedMilliseconds;
                }
            }
        }