ASP.NET MVC: Implement Maintenance Mode

Updated on May 15, 2018     Kisan Patel

Problems:

How to take an ASP.NET MVC web site “Down for maintenance”?
Implement “Down for maintenance” page.
Web site Maintenance Page ASP.NET MVC.
How to put your site into “maintenance mode”?

Solution

public class MvcApplication : System.Web.HttpApplication
{

       public static void RegisterGlobalFilters(GlobalFilterCollection filters)
       {
            filters.Add(new CheckForDownPage());

       }

        //the rest of your global asax
        //....
}

public class CheckForDownPage : ActionFilterAttribute
{
       public override void OnActionExecuting(ActionExecutingContext filterContext)
       {
             var path = System.Web.Hosting.HostingEnvironment.MapPath("~/Down.htm");

             if (System.IO.File.Exists(path) && IpAddress != "1.2.3.4")
             {
                    filterContext.HttpContext.Response.Clear();
                    filterContext.HttpContext.Response.Redirect("~/Down.htm");
                    return;
             }

              base.OnActionExecuting(filterContext);
        }
}