概述
appsettings.json：配置文件，数据库连接字符串配置信息
Program.cs：程序入口文件（里面有个Main方法）
Startup.cs：启动配置文件
依赖项：管理项目所依赖的第三方组件的安装，配置，升级
Controller：控制器
Models：实体
Views：视图
namespace Sample01.Models
{/// <summary>/// 2018.11.19/// 祝雷/// 内容实体/// </summary>public class Content{/// <summary>/// 主键/// </summary>public int Id { get; set; }/// <summary>/// 标题/// </summary>public string title { get; set; }/// <summary>/// 内容/// </summary>public string content { get; set; }/// <summary>/// 状态 1正常 0删除/// </summary>public int status { get; set; }/// <summary>/// 创建时间/// </summary>public DateTime add_time { get; set; }/// <summary>/// 修改时间/// </summary>public DateTime modify_time { get; set; }}
}namespace Sample01.Controllers
{/// <summary>/// Content控制器/// </summary>public class ContentController : Controller{/// <summary>/// 首页显示/// </summary>/// <returns></returns>public IActionResult Index(){var contents = new List<Content>();for (int i = 1; i < 11; i++){contents.Add(new Content { Id=i,title=$"{i}的标题",content= $"{i}的内容",status=1, add_time=DateTime.Now.AddDays(-i)}); }return View(new ContentViewModel { Contents=contents});} }
}依赖项注入DI
构造函数传参，松耦合，可测试，可替换，可维护
more：体系结构原则 - .NET | Microsoft Learn
https://www.cnblogs.com/youring2/p/10926590.html
概念我知道，但不知道怎么使用，是不是得去看看.net core的教程
生命周期
1.瞬态：
2.单例：
3.作用域：
builder.Services.AddTransient<IUserService,UserService>();
builder.Services.AddSingleton<IUserService,UserService>();
builder.Services.AddScoped<IUserService,UserService>();
???
注入方式
1.构造函数注入：
2.属性注入：
3.方法注入：
中间件
var builder= WebApplication.CreateBuilder(args);
var app= builder.Build();app.Use(async (context, next) =>
{await next.Invoke();//Invoke? 走下一个中间件
});app.Run(async context =>
{await context.Response.WriteAsync("你好你被中间件截胡了");//短路
});
app.Run();
1.静态文件中间件
app.UseStaticFiles();启用静态文件中间件
using Microsoft.Extensions.FileProviders;var builder= WebApplication.CreateBuilder(args);
var app= builder.Build();//app.Use(async (context, next) =>
//{
// await next.Invoke();
//});//app.Run(async context =>
//{
// await context.Response.WriteAsync("你好你被中间件截胡了");
//});
app.UseStaticFiles(new StaticFileOptions()
{FileProvider = new PhysicalFileProvider(Path.Combine(builder.Environment.ContentRootPath, "MyStaticFile")),RequestPath= "/StaticFiles"
});
app.Run();创建该文件夹
2.改变静态文件访问地址（改变文件夹）
app.UseStaticFiles(new StaticFileOptions()
{FileProvider = new PhysicalFileProvider(Path.Combine(builder.Environment.ContentRootPath, "MyStaticFile")),RequestPath= "/StaticFiles"//https://localhost:7064/StaticFiles/1.png
});因为缓存的原因原来的还能被打开
3.启用目录浏览
展示该站点下有哪些静态文件，服务可以访问
using Microsoft.Extensions.FileProviders;var builder= WebApplication.CreateBuilder(args);
var app= builder.Build();var fileProvider = new PhysicalFileProvider(Path.Combine(builder.Environment.ContentRootPath, "MyStaticFile"));//1.文件路径
var requestPath = "/MyImages";//2.请求路径//app.Use(async (context, next) =>
//{
// await next.Invoke();
//});//app.Run(async context =>
//{
// await context.Response.WriteAsync("你好你被中间件截胡了");
//});
app.UseStaticFiles(new StaticFileOptions()
{FileProvider = new PhysicalFileProvider(Path.Combine(builder.Environment.ContentRootPath, "MyStaticFile")),RequestPath= requestPath ,//3
});
app.UseDirectoryBrowser(new DirectoryBrowserOptions
{FileProvider = fileProvider,RequestPath = requestPath
}); //4.开启目录浏览
app.Run();4.https重定向
app.UseHsts();
app.UseHttpsRedirection();//实现重定向 -当打开的是不安全的站点时自动跳转5.读取配置
builder.Services.AddDirectoryBrowser();
app.MapGet("config1", (IConfiguration configuration) =>
{return configuration["msg"] + "_" + configuration["Logging:LogLevel:Default"];
});
app.MapGet("config2", (IConfiguration configuration) =>
{return configuration.GetValue<string>("msg");
});
app.MapGet("config3", (IConfiguration configuration) =>
{return configuration.GetSection("msg").Value;
});IConfiguration //configuration构造
通过路由终结点来演示读取这个配置
builder.Services.AddDirectoryBrowser();
app.MapGet("config", (IConfiguration configuration) =>
{return configuration["msg"] + "_" + configuration["Logging:LogLevel:Default"];
});
通过GetValue方法获取
通过GetSection方法获取
5.2读取对象配置
using WebApplication5.Model;
app.MapGet("config4", (IConfiguration configuration) =>
{return configuration.GetSection("Person").Get<Person>();
});
