(精华)2020年8月22日 ABP vNext Web应用ABP

现在我们开始创建基于RazorPage的web应用。在解决方案中添加新的Asp.Net Core Web应用项目，名称为ZL.AbpNext.Poem.Web，然后安装volo.Abp.AspNetCore.Mvc和volo.Abp.Autofac，还要添加项目依赖ZL.AbpNext.Poem.Application和ZL.AbpNetx.Poem.EF：

接下来创建Abp模块：

using Microsoft.AspNetCore.Builder;
using Microsoft.Extensions.Hosting;
using Volo.Abp;
using Volo.Abp.AspNetCore.Mvc;
using Volo.Abp.Autofac;
using Volo.Abp.Modularity;
using ZL.AbpNext.Poem.Application;
using ZL.AbpNext.Poem.Core;
using ZL.AbpNext.Poem.EF;

namespace ZL.AbpNext.Poem.Web
{
     
    [DependsOn(typeof(AbpAspNetCoreMvcModule),
        typeof(AbpAutofacModule),
    typeof(PoemCoreModule),
    typeof(PoemApplicationModule),
    typeof(PoemDataModule))]
    public class PoemWebModule : AbpModule
    {
     
        public override void OnApplicationInitialization(
            ApplicationInitializationContext context)
        {
     
            var app = context.GetApplicationBuilder();
            var env = context.GetEnvironment();

            if (env.IsDevelopment())
            {
     
                app.UseDeveloperExceptionPage();
            }
            else
            {
     
                app.UseExceptionHandler("/Error");
            }

            app.UseStaticFiles();
            app.UseRouting();
            app.UseConfiguredEndpoints();
        }
    }
}

我们注意到原来Startup中的很多代码移动到模块中了，Startup变得很简单，只要启动模块就可以了：

using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;

namespace ZL.AbpNext.Poem.Web
{
     
    public class Startup
    {
     
        public void ConfigureServices(IServiceCollection services)
        {
     
            services.AddApplication<PoemWebModule>();
        }

        public void Configure(IApplicationBuilder app)
        {
     
            app.InitializeApplication();
        }
    }
}

最后，在Program中增加Autofac:

using Microsoft.AspNetCore.Hosting;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.Hosting;

namespace ZL.AbpNext.Poem.Web
{
     
    public class Program
    {
     
        public static void Main(string[] args)
        {
     
            CreateHostBuilder(args).Build().Run();
        }

        public static IHostBuilder CreateHostBuilder(string[] args) =>
            Host.CreateDefaultBuilder(args)
                .ConfigureWebHostDefaults(webBuilder =>
                {
     
                    webBuilder.UseStartup<Startup>();
                }).UseAutofac();
    }
}

到这里，Abp相关的基础工作就完成了。我们还需要修改一下appsettings.json，将数据库连接加进去：

{
     
  "ConnectionStrings": {
     
    "Poem": "Server=localhost;Database=PoemNew;Trusted_Connection=True;MultipleActiveResultSets=true"
  },

现在我们修改Index页面，显示数据中的分类列表。后台代码很简单，只要通过依赖注入获取IPoemAppService的实例，并调用相应的函数就可以了：

using System.Collections.Generic;
using Microsoft.AspNetCore.Mvc.RazorPages;
using Microsoft.Extensions.Logging;
using ZL.AbpNext.Poem.Application.Poems;

namespace ZL.AbpNext.Poem.Web.Pages
{
     
    public class IndexModel : PageModel
    {
     
        private readonly ILogger<IndexModel> _logger;
        private IPoemAppService service;

        public List<CategoryDto> categories;

        public IndexModel(ILogger<IndexModel> logger, IPoemAppService service)
        {
     
            _logger = logger;
            this.service = service;
        }

        public void OnGet()
        {
     
            categories=service.GetAllCategories();
        }
    }
}

页面文件也很简单：

@page
@model IndexModel
@{
     
    ViewData["Title"] = "Home page";
}

<div class="text-center">
    <ul>
        @foreach (var category in Model.categories)
        {
     
            <li>@category.CategoryName</li>
        }
    </ul>
</div>

运行结果是这样的：

到这里，我们已经开发了一个简单的应用。