ASP.NET Core MVC通過IViewLocationExpander擴展視圖搜索路徑

IViewLocationExpander API

• ExpandViewLocations Razor視圖路徑，視圖引擎會搜索該路徑.
• PopulateValues 每次調用都會填充路由

項目目錄如下所示

創建區域擴展器，其實我並不需要多區域，我目前只需要達到一個區域中有多個文件夾進行存放我的視圖.

所以我通過實現IViewLocationExpander進行擴展添加我自定義視圖路徑規則即可正如下代碼片段

 public class MyViewLocationExpander : IViewLocationExpander
    {
        public IEnumerable<string> ExpandViewLocations(ViewLocationExpanderContext context, IEnumerable<string> viewLocations)
        {
            if (context.ControllerName != null && context.ControllerName.StartsWith("App"))
            {
                viewLocations = viewLocations.Concat(
                    new[] { $"/Areas/sysManage/Views/App/{context.ControllerName}/{context.ViewName}{RazorViewEngine.ViewExtension}"
                           });
                return viewLocations;
            }

            if (context.AreaName != "sysManage") return viewLocations;
            viewLocations = viewLocations.Concat(
                new[] { $"/Areas/sysManage/Views/System/{context.ControllerName}/{context.ViewName}{RazorViewEngine.ViewExtension}"
                });
            return viewLocations;
        }

        public void PopulateValues(ViewLocationExpanderContext context)
        {
        }
    }

在Startup.ConfigureServices 註冊

  public void ConfigureServices(IServiceCollection services)  
        {  
            services.Configure<RazorViewEngineOptions>(o => {  
                o.ViewLocationExpanders.Add(new MyViewLocationExpander());  
            });  
            services.AddMvc();  
        } 

 app.UseEndpoints(endpoints =>
            {
                endpoints.MapRazorPages();
                endpoints.MapAreaControllerRoute(
                    name: "sysManage", "sysManage",
                    pattern: "{area:exists}/{controller=Home}/{action=Index}/{id?}");
            });

最終路由指向的還是

/SysManage/Controller/Action