修改Abp 模板项目中的导航

使用Abp官网的模板生成的基于AbpZero模块的项目，导航菜单的定义代码在Web项目App_Start目录下，文件名为<项目名称>NavigationProvider.cs的代码中，比如，我的Abp项目名称为jiagoushi_cm.MyPlat，Web项目的名称为jiagoushi_cm.MyPlat.Web，导航菜单的代码为MyPlatNavigationProvider.cs，模板生成的代码大致如下：

using Abp.Application.Navigation;
using Abp.Localization;
using jiagoushi_cn.MyPlat.Authorization;

namespace jiagoushi_cn.MyPlat.Web
{
    /// <summary>
    /// This class defines menus for the application.
    /// It uses ABP's menu system.
    /// When you add menu items here, they are automatically appear in angular application.
    /// See Views/Layout/_TopMenu.cshtml file to know how to render menu.
    /// </summary>
    public class MyPlatNavigationProvider : NavigationProvider
    {
        public override void SetNavigation(INavigationProviderContext context)
        {
            context.Manager.MainMenu
                .AddItem(
                    new MenuItemDefinition(
                        PageNames.Home,
                        L("HomePage"),
                        url: "",
                        icon: "home",
                        requiresAuthentication: true,
                         )
                ).AddItem(
                    new MenuItemDefinition(
                        PageNames.Tenants,
                        L("Tenants"),
                        url: "Tenants",
                        icon: "business",
                        requiredPermissionName: PermissionNames.Pages_Tenants,
                         )
                ).AddItem(
                    new MenuItemDefinition(
                        PageNames.Users,
                        L("Users"),
                        url: "Users",
                        icon: "people",
                        requiredPermissionName: PermissionNames.Pages_Users,
                       )
                );
        }

        private static ILocalizableString L(string name)
        {
            return new LocalizableString(name, MyPlatConsts.LocalizationSourceName);
        }
    }
}

采用硬编码的方式添加菜单的数据。
菜单的初始化代码在WebModel的预处理函数中：

using System.Reflection;
using System.Web;
using System.Web.Mvc;
using System.Web.Optimization;
using System.Web.Routing;
using Abp.Hangfire;
using Abp.Hangfire.Configuration;
using Abp.Zero.Configuration;
using Abp.Modules;
using Abp.Web.Mvc;
using Abp.Web.SignalR;
using jiagoushi_cn.MyPlat.Api;
using Castle.MicroKernel.Registration;
using Hangfire;
using Microsoft.Owin.Security;
using Abp.Collections.Extensions;
using jiagoushi_cn.MyPlat.Navigation;

namespace jiagoushi_cn.MyPlat.Web
{
    [DependsOn(
        typeof(MyPlatDataModule),
        typeof(MyPlatApplicationModule),
        typeof(MyPlatWebApiModule),
        typeof(AbpWebSignalRModule),
        //typeof(AbpHangfireModule), - ENABLE TO USE HANGFIRE INSTEAD OF DEFAULT JOB MANAGER
        typeof(AbpWebMvcModule))]
    public class MyPlatWebModule : AbpModule
    {
        public override void PreInitialize()
        {
             //Enable database based localization
            Configuration.Modules.Zero().LanguageManagement.EnableDbLocalization();

            //Configure navigation/menu
            Configuration.Navigation.Providers.Add<MyPlatNavigationProvider>();

            //Configure Hangfire - ENABLE TO USE HANGFIRE INSTEAD OF DEFAULT JOB MANAGER
            //Configuration.BackgroundJobs.UseHangfire(configuration =>
            //{
            //    configuration.GlobalConfiguration.UseSqlServerStorage("Default");
            //});
        }

        public override void Initialize()
        {
            IocManager.RegisterAssemblyByConvention(Assembly.GetExecutingAssembly());

            IocManager.IocContainer.Register(
                Component
                    .For<IAuthenticationManager>()
                    .UsingFactoryMethod(() => HttpContext.Current.GetOwinContext().Authentication)
                    .LifestyleTransient()
            );

            AreaRegistration.RegisterAllAreas();
            RouteConfig.RegisterRoutes(RouteTable.Routes);
            BundleConfig.RegisterBundles(BundleTable.Bundles);

            
        }
    }
}

在初始化函数中，将MyPlatNavigationProvider加载到Configuration中。
如果我们希望从数据库或者文件等持久化数据源中读取菜单数据，可以修改MyPlatNavigationProvider 中的代码，需要注意的是：

• 如果从数据库中读取数据，不能使用基于EfRepositoryBase的仓储（原因参见以前的分析文章），可以直接使用DbContext。
• 无法实现动态加载，数据源中的数据改变后，需要重启应用才能刷新菜单数据。