基于移动Web的视图引擎实现

第一步:移动视图引擎实现

using System.Web.Mvc;

    /// <summary>
    /// 移动版View引擎
    /// </summary>
    public class MobileViewEngine : RazorViewEngine
    {
        public override ViewEngineResult FindView(ControllerContext controllerContext, string viewName, string masterName, bool useCache)
        {
            ViewEngineResult result = null;
            var request = controllerContext.HttpContext.Request;

            if (request.IsSupportedMobileDevice() && ApplicationHelper.HasMobileSpecificViews)
            {
                var viewPathAndName = ApplicationHelper.MobileViewsDirectoryName + viewName;
                result = base.FindView(controllerContext, viewPathAndName, masterName, true);
                if (result == null || result.View == null)
                {
                    result = base.FindView(controllerContext, viewPathAndName, masterName, false);
                }
            }
            else
            {
                result = base.FindView(controllerContext, viewName, masterName, useCache);
            }
            return result;
        }
    }

第二步：移动视图辅助工具

using System;
using System.Configuration;
using System.Web;

public static class ApplicationHelper
    {
        public static bool HasMobileSpecificViews
        {
            get
            {
                bool configCheck;
                bool.TryParse(ConfigurationManager.AppSettings["HasMobileSpecificViews"], out configCheck);
                return configCheck;

            }
        }
        /// <summary>
        /// Used to enable debugging using alternative devices
        /// </summary>
        /// <param name="request"></param>
        /// <returns></returns>
        public static bool IsSupportedMobileDevice(this HttpRequestBase request)
        {

            bool isMobile = request.Browser.IsMobileDevice;
            string userAgent = request.UserAgent.ToLowerInvariant();

            isMobile = isMobile
                    || (userAgent.Contains("iphone")
                    || userAgent.Contains("blackberry")
                    || userAgent.Contains("mobile")
                    || userAgent.Contains("windows ce")
                    || userAgent.Contains("opera mini")
                    || userAgent.Contains("palm")
                    || userAgent.Contains("fennec")
                    || userAgent.Contains("adobeair")
                    || userAgent.Contains("ripple")
                    || userAgent.Contains("ipad")
                    || userAgent.Contains("pad")
                    || userAgent.Contains("iphone")
                    || userAgent.Contains("samsung")
                    || userAgent.Contains("pod")
                );
            return isMobile;

        }

        public static string MobileViewsDirectoryName
        {
            get
            {
                string directoryName = ConfigurationManager.AppSettings["MobileViewsDirectoryName"];
                return !string.IsNullOrEmpty(directoryName) ? String.Format("{0}/", directoryName) : string.Empty;
            }
        }

    }

第三步：移动视图引擎接入以及路由配置

 public class MvcApplication : System.Web.HttpApplication
    {
        public static void RegisterGlobalFilters(GlobalFilterCollection filters)
        {
            filters.Add(new ExceptionFilter());
            filters.Add(new HandleErrorAttribute());
        }

        public static void RegisterRoutes(RouteCollection routes)
        {
            routes.IgnoreRoute("{resource}.axd/{*pathInfo}");

            //PC-Web
            routes.MapRoute(
                "Default", // 路由名称
                "{controller}/{action}/{id}", // 带有参数的 URL
                new { controller = "Login", action = "Index", id = UrlParameter.Optional } // 参数默认值
            );

            ////Mobile-Web
            routes.MapRoute(
                "MobileDefault", // 路由名称
                "Mobile/{controller}/{action}/{id}", // 带有参数的 URL
                new { controller = "MobileHome", action = "Index", id = UrlParameter.Optional } // 参数默认值
            );
        }

        protected void Application_Start()
        {

            //移动WEB-View引擎
            ViewEngines.Engines.Add(new MobileViewEngine());
            AreaRegistration.RegisterAllAreas();
            GlobalConfiguration.Configure(WebApiConfig.Register);
            RegisterGlobalFilters(GlobalFilters.Filters);
            RegisterRoutes(RouteTable.Routes);     

        }

        protected void Application_Error(object sender, EventArgs e)
        {

        }
    }