Global.asax.cs

using System;
using System.Web.Http;
using System.Web.Mvc;
using System.Web.Routing;
using DevExpress.Web.Mvc;
using Reporting_ObjectDS_Mvc.Employees;
using Reporting_ObjectDS_Mvc.Services;

namespace Reporting_ObjectDS_Mvc {
    // Note: For instructions on enabling IIS6 or IIS7 classic mode, 
    // visit http://go.microsoft.com/?LinkId=9394801

    public class MvcApplication : System.Web.HttpApplication {
        protected void Application_Start() {

            DevExpress.XtraReports.Configuration.Settings.Default.UserDesignerOptions.DataBindingMode = DevExpress.XtraReports.UI.DataBindingMode.Expressions;
            DevExpress.XtraReports.Web.WebDocumentViewer.Native.WebDocumentViewerBootstrapper.SessionState = System.Web.SessionState.SessionStateBehavior.Default;
            DevExpress.XtraReports.Web.QueryBuilder.Native.QueryBuilderBootstrapper.SessionState = System.Web.SessionState.SessionStateBehavior.Default;
            DevExpress.XtraReports.Web.ReportDesigner.Native.ReportDesignerBootstrapper.SessionState = System.Web.SessionState.SessionStateBehavior.Default;
            DevExpress.XtraReports.Web.Extensions.ReportStorageWebExtension.RegisterExtensionGlobal(new CustomReportStorageWebExtension(Server.MapPath("/Reports")));


            DevExpress.XtraReports.Web.WebDocumentViewer.DefaultWebDocumentViewerContainer.Register<DevExpress.XtraReports.Web.WebDocumentViewer.IWebDocumentViewerReportResolver, CustomWebDocumentViewerReportResolver>();


            DevExpress.XtraReports.Web.ReportDesigner.DefaultReportDesignerContainer.RegisterObjectDataSourceWizardTypeProvider<ObjectDataSourceWizardCustomTypeProvider>();
            DevExpress.XtraReports.Web.ReportDesigner.DefaultReportDesignerContainer.RegisterObjectDataSourceConstructorFilterService<CustomObjectDataSourceConstructorFilterService>();
            DevExpress.Utils.DeserializationSettings.RegisterTrustedClass(typeof(EmployeeList));
            System.Net.ServicePointManager.SecurityProtocol |= System.Net.SecurityProtocolType.Tls12;
            MVCxReportDesigner.StaticInitialize();

            DevExpress.XtraReports.Web.ClientControls.LoggerService.Initialize((ex, message) => System.Diagnostics.Debug.WriteLine("[{0}]: Exception occurred. Message: '{1}'. Exception Details:\r\n{2}", DateTime.Now, message, ex));
            AreaRegistration.RegisterAllAreas();

            GlobalConfiguration.Configure(WebApiConfig.Register);
            FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters);
            RouteConfig.RegisterRoutes(RouteTable.Routes);

            ModelBinders.Binders.DefaultBinder = new DevExpress.Web.Mvc.DevExpressEditorsBinder();

            DevExpress.Web.ASPxWebControl.CallbackError += Application_Error;
        }

        protected void Application_Error(object sender, EventArgs e) {
            Exception exception = System.Web.HttpContext.Current.Server.GetLastError();
            //TODO: Handle Exception
        }
    }
}