把旧系统迁移到.Net Core 2.0 日记（6) MapRoute/Area/ViewPath

我想实现 http://localhost:5000/{moduleName}/{controller}/{action}/{id?} 这样的url.

有2个方法

方法1: 在路由里设置多个module

            app.UseMvc(routes =>
            {
                routes.MapRoute(
                    name: "CRM",
                    template: "CRM/{controller=Home}/{action=Index}/{id?}",
                    defaults:null,
                    constraints:null,
                    dataTokens:new string[] { "FoxCRMCore.Controllers.CRM" });

                routes.MapRoute(
                    name: "default",
                    template: "{controller=Home}/{action=Index}/{id?}");
            });

MVC return View(string viewName) 中viewName的表达方式

return View("../CRM/Announcement/Index");
//或者
return View("/Views/CRM/Announcement/Index.cshtml");   

当然你不想这样Hardcode View的路径. 可以在ConfigService方法里加入自定义ViewLocationFormats

            services.Configure<RazorViewEngineOptions>(Options =>
            {
                Options.ViewLocationFormats.Add("/Views/CRM/{1}/{0}.cshtml");
            });

参考这个

https://www.cnblogs.com/dudu/archive/2012/12/14/asp-net-mvc-area.html

http://www.cnblogs.com/dotNETCoreSG/p/aspnetcore-4_4_6-areas.html

但是第1种写法自定义RazorViewEngineOptions还是不够优雅, 因为可能有10个模块,你就要写10条map-Route,10条RazorViewEngineOptions

这个时候,可以用Area, 方法2:

在StartUp.cs的 ConfigureServices方法里加入:

            //{2}=AreaName,{1}=Controller,{0}=Action
            services.Configure<RazorViewEngineOptions>(options =>
            {
                options.AreaViewLocationFormats.Add("/Views/{2}/{1}/{0}.cshtml");
            });

在 Configure方法里改成

            app.UseMvc(routes =>
            {
                routes.MapRoute(
                    name: "areaRoute",
                    template: "{area:exists}/{controller=Home}/{action=Index}/{id?}");

                routes.MapRoute(
                    name: "default",
                    template: "{controller=Home}/{action=Index}/{id?}");
            });

然后在controller里 加入AreaAttribute

    [Area("CRM")]
    public class AnnouncementController : Controller
   {}

这样就能无需指定View的路径了.

return View(); 

netCore Controller返回的JsonResult ,即使你C#代码里首字母是大写, 也会默认是CamelCase, 首字母小写的,

参考这个: https://github.com/aspnet/Mvc/issues/4283

            var list = _context.Announcements
                .Select(entity => new
                {
                    entity.ID,
                    entity.Subject,
                    entity.ContentDesc,
                    CreateDate = entity.CDate.ToString(),
                    entity.CUser,
                    entity.IsActive
                });

            var result = new { total = list.Count(), rows = list.ToList() };

            return Json(result);

返回的json结果

{
    "total": 1,
    "rows": [
    {
    "id": 1,
    "subject": "test 公告",
    "contentDesc": "公告内容",
    "createDate": "2018-04-10 21:41:47",
    "cUser": 1,
    "isActive": true
    }
    ]
}

吐槽一下Mac 的VS2017, 我在View里更改html,加入JEasyUI的datagrid,怎么都不生效,重新build & Run 几次之后又生效了. 难道是View的缓存?

View的更改也要重新Build???