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

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

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原文链接：https://www.cnblogs.com/yyfh/p/12636976.html