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

• 2020 年 4 月 5 日
• 筆記

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