1.在Global.asax中的Application_Start()方法中新增

public class MvcApplication : System.Web.HttpApplication
    {
        protected void Application_Start()
        {
            //配置log4
            log4net.Config.XmlConfigurator.Configure(new System.IO.FileInfo(Server.MapPath("~/log4net.config")));
            AreaRegistration.RegisterAllAreas();
            FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters);
            RouteConfig.RegisterRoutes(RouteTable.Routes);
            BundleConfig.RegisterBundles(BundleTable.Bundles);

            
 
//自定義檢視查詢
            ViewEngines.Engines.Clear();
            ViewEngines.Engines.Add(new CustomViewEngine());



        }

        protected void Application_BeginRequest(object sender, EventArgs e)
        {
            //新增平臺資訊
            Request.Headers.Add("Platform", GetPlatform(Request));
            
 
string p = Request.Headers.Get("Platform");
        }

        public static string GetPlatform(HttpRequest request)
        {
            //return "PC";
            string http_user_agent = request.ServerVariables["HTTP_USER_AGENT"];
            Regex b = new Regex(@"(android|bb\d+|meego).+mobile|avantgo|bada\/|blackberry|blazer|compal|elaine|fennec|hiptop|iemobile|ip(hone|od)|iris|kindle|lge |maemo|midp|mmp|mobile.+firefox|netfront|opera m(ob|in)i|palm( os)?|phone|p(ixi|re)\/|plucker|pocket|psp|series(4|6)0|symbian|treo|up\.(browser|link)|vodafone|wap|windows ce|xda|xiino
 
", RegexOptions.IgnoreCase | RegexOptions.Multiline);
            Regex v = new Regex(@"1207|6310|6590|3gso|4thp|50[1-6]i|770s|802s|a wa|abac|ac(er|oo|s\-)|ai(ko|rn)|al(av|ca|co)|amoi|an(ex|ny|yw)|aptu|ar(ch|go)|as(te|us)|attw|au(di|\-m|r |s )|avan|be(ck|ll|nq)|bi(lb|rd)|bl(ac|az)|br(e|v)w|bumb|bw\-(n|u)|c55\/|capi|ccwa|cdm\-|cell|chtm|cldc|cmd\-|co(mp|nd)|craw|da(it|ll|ng)|dbte|dc\-s|devi|dica|dmob|do(c|p)o|ds(12|\-d)|el(49|ai)|em(l2|ul)|er(ic|k0)|esl8|ez([4-7]0|os|wa|ze)|fetc|fly(\-|_)|g1 u|g560|gene|gf\-5|g\-mo|go(\.w|od)|gr(ad|un)|haie|hcit|hd\-(m|p|t)|hei\-|hi(pt|ta)|hp( i|ip)|hs\-c|ht(c(\-| |_|a|g|p|s|t)|tp)|hu(aw|tc)|i\-(20|go|ma)|i230|iac( |\-|\/)|ibro|idea|ig01|ikom|im1k|inno|ipaq|iris|ja(t|v)a|jbro|jemu|jigs|kddi|keji|kgt( |\/)|klon|kpt |kwc\-|kyo(c|k)|le(no|xi)|lg( g|\/(k|l|u)|50|54|\-[a-w])|libw|lynx|m1\-w|m3ga|m50\/|ma(te|ui|xo)|mc(01|21|ca)|m\-cr|me(rc|ri)|mi(o8|oa|ts)|mmef|mo(01|02|bi|de|do|t(\-| |o|v)|zz)|mt(50|p1|v )|mwbp|mywa|n10[0-2]|n20[2-3]|n30(0|2)|n50(0|2|5)|n7(0(0|1)|10)|ne((c|m)\-|on|tf|wf|wg|wt)|nok(6|i)|nzph|o2im|op(ti|wv)|oran|owg1|p800|pan(a|d|t)|pdxg|pg(13|\-([1-8]|c))|phil|pire|pl(ay|uc)|pn\-2|po(ck|rt|se)|prox|psio|pt\-g|qa\-a|qc(07|12|21|32|60|\-[2-7]|i\-)|qtek|r380|r600|raks|rim9|ro(ve|zo)|s55\/|sa(ge|ma|mm|ms|ny|va)|sc(01|h\-|oo|p\-)|sdk\/|se(c(\-|0|1)|47|mc|nd|ri)|sgh\-|shar|sie(\-|m)|sk\-0|sl(45|id)|sm(al|ar|b3|it|t5)|so(ft|ny)|sp(01|h\-|v\-|v )|sy(01|mb)|t2(18|50)|t6(00|10|18)|ta(gt|lk)|tcl\-|tdg\-|tel(i|m)|tim\-|t\-mo|to(pl|sh)|ts(70|m\-|m3|m5)|tx\-9|up(\.b|g1|si)|utst|v400|v750|veri|vi(rg|te)|vk(40|5[0-3]|\-v)|vm40|voda|vulc|vx(52|53|60|61|70|80|81|83|85|98)|w3c(\-| )|webc|whit|wi(g |nc|nw)|wmlb|wonu|x700|yas\-|your|zeto|zte\-", RegexOptions.IgnoreCase | RegexOptions.Multiline);
            return (b.IsMatch(http_user_agent) || v.IsMatch(http_user_agent.Substring(0, 4))) ? "1" : "0";
        }
    }

2.自定義查詢檢視

public class CustomViewEngine: RazorViewEngine
    {
        /// <summary>
        /// 自定義查詢檢視
        /// </summary>
        /// <param name="controllerContext"></param>
        /// <param name="viewName"></param>
        /// <param name="masterName"></param>
        /// <param name="useCache"></param>
        /// <returns></returns>
        public override ViewEngineResult FindView(ControllerContext controllerContext, string viewName, string masterName, bool useCache)
        {
            var controllerName = (controllerContext.RouteData.Values["controller"]).ToString();
            var actionName = (controllerContext.RouteData.Values["action"]).ToString();
            var areaName = (controllerContext.RouteData.Values["area"] ?? "").ToString();
            if (string.IsNullOrWhiteSpace(areaName))
            {
                areaName = (controllerContext.RouteData.DataTokens["area"] == null ? "" : controllerContext.RouteData.DataTokens["area"]).ToString();
            }

            bool isNotShowLayout = false;
            try
            {
                isNotShowLayout = (bool)controllerContext.Controller.ViewData["IsNotShowLayout"];
            }
            catch (Exception ex)
            {

            }
            string masterPath = string.Format("~/Views/{0}/PC/Shared/_Layout.cshtml", areaName);

            string platform = controllerContext.HttpContext.Request.Headers.Get("Platform");
            string toViewPath = string.Format("~/Views/{0}/PC/{1}/{2}.cshtml", areaName, controllerName, actionName);
            if (platform == "1")
            {
                masterPath = string.Format("~/Views/{0}/M/Shared/_Layout.cshtml", areaName);
                toViewPath = string.Format("~/Views/{0}/M/{1}/{2}.cshtml", areaName, controllerName, actionName);
            }
            masterPath = "~/Views/Shared/Test.cshtml";
            if (isNotShowLayout) masterPath = string.Empty;
            return new ViewEngineResult(this.CreateView(controllerContext, toViewPath, masterPath), this);
        }
    }

3.最後則是同一個訪問連結進行訪問 pc端訪問進入PC資料夾的view檢視 ，m訪問進入M資料夾的view檢視