ASP.NET Core MVC通过IViewLocationExpander扩展视图搜索路径

• 2020 年 4 月 5 日
• 笔记

IViewLocationExpander API

• ExpandViewLocations Razor视图路径，视图引擎会搜索该路径.
• PopulateValues 每次调用都会填充路由

项目目录如下所示

创建区域扩展器，其实我并不需要多区域，我目前只需要达到一个区域中有多个文件夹进行存放我的视图.

所以我通过实现IViewLocationExpander进行扩展添加我自定义视图路径规则即可正如下代码片段

 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 注册

  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?}");              });  

最终路由指向的还是

/SysManage/Controller/Action