前言

直接上干货就是，就不废话了。
使用场景：分离模块，多站点等~~

一、分离模块

自定义视图引擎，设置视图路径格式
项目结构图

1.Code: 在Global.asax Application_Start方法中添加自定义的视图引擎

using System.Collections.Generic;
using System.Web.Mvc;
namespace MvcProjectMain.AreasViewEngine
{

    /// <summary>       
    /// 自定义视图引擎
    /// </summary>
    /// <remarks>
    ///  ViewEngines.Engines.Add(new MvcProjectMain.AreasViewEngine.ThemableRazorViewEngine());
    /// </remarks>
    public class ThemableRazorViewEngine : VirtualPathProviderViewEngine
    {
        //所有区域分离到Modules文件夹,{2}为区域名
        public ThemableRazorViewEngine()
        {
            ViewEngines.Engines.Clear();
            AreaViewLocationFormats = new[]
            {
            "~/Modules/{2}/Views/{1}/{0}.cshtml", 
            "~/Modules/{2}/Views/Shared/{0}.cshtml",
            };

            AreaMasterLocationFormats = new[]
            {
            "~/Modules/{2}/Views/{1}/{0}.cshtml", 
            "~/Modules/{2}/Views/Shared/{0}.cshtml",
            };

            AreaPartialViewLocationFormats = new[]
            {
            "~/Modules/{2}/Views/{1}/{0}.cshtml", 
            "~/Modules/{2}/Views/Shared/{0}.cshtml", 
            };

            ViewLocationFormats = new[]
            {
            "~/Views/{1}/{0}.cshtml", 
            "~/Views/Shared/{0}.cshtml",
            };

            MasterLocationFormats = new[]
            {
            "~/Views/{1}/{0}.cshtml", 
            "~/Views/Shared/{0}.cshtml", 
            };
            PartialViewLocationFormats = new[]
            {
            "~/Views/{1}/{0}.cshtml", 
            "~/Views/Shared/{0}.cshtml", 
            };

            FileExtensions = new[] { "cshtml" };
        }

        protected override IView CreatePartialView(ControllerContext controllerContext, string partialPath)
        {
            string layoutPath = null;
            var runViewStartPages = false;
            IEnumerable<string> fileExtensions = base.FileExtensions;
            return new RazorView(controllerContext, partialPath, layoutPath, runViewStartPages, fileExtensions);
        }

        protected override IView CreateView(ControllerContext controllerContext, string viewPath, string masterPath)
        {
            string layoutPath = masterPath;
            var runViewStartPages = true;
            IEnumerable<string> fileExtensions = base.FileExtensions;
            return new RazorView(controllerContext, viewPath, layoutPath, runViewStartPages, fileExtensions);
        }
    }
}

2.Code:在Global.asax中添加注册区域–>AreaRegistration.RegisterAllAreas();

public class ThemesAreaRegistration : AreaRegistration
    {
        public override string AreaName
        {
            get
            {
                return "MvcProjectThemes";
            }
        }

        public override void RegisterArea(AreaRegistrationContext context)
        {
            context.MapRoute(
                "MvcProjectThemes",
                "MvcProjectThemes/{controller}/{action}/{id}",
                new { controller = "Home", action = "Index", id = UrlParameter.Optional, },
                namespaces: new string[] { "MvcProjectThemes.Controllers" }
            );
        }
    }

3.Code:注册主项目MvcProjectMain的路由 RouteConfig.RegisterRoutes(RouteTable.Routes);

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

            routes.MapRoute(
                name: "Default",
                url: "{controller}/{action}/{id}",
                defaults: new { controller = "Home", action = "Index", id = UrlParameter.Optional },
                namespaces: new string[] { "MvcProjectMain.Controllers" }
            );
        }
    }
}

最后

主要代码就是步骤1中的ThemableRazorViewEngine.cs类。自定义查找路径，其他的都是MVC的基础知识了,不懂自行查阅资料