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

更新時間：2020年04月07日 09:05:35 作者：HueiFeng

這篇文章主要介紹了ASP.NET Core MVC通過IViewLocationExpander擴展視圖搜索路徑的實現，文中通過示例代碼介紹的非常詳細，對大家的學習或者工作具有一定的參考學習價值，需要的朋友們下面隨著小編來一起學習學習吧

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(chuàng)建區(qū)域擴展器，其實我并不需要多區(qū)域，我目前只需要達到一個區(qū)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(guī)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 注冊

 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