ASP.NET Core 核心特性学习笔记「下」

public void ConfigureServices(IServiceCollection services)
{
  services.Add(new ServiceDescriptor(typeof(IBook), typeof(Book), ServiceLifetime.Scoped));
}

public class ProductService
{
    private readonly IProductRepository _productRepository;
    public ProductService(IProductRepository productRepository)
    {
        _productRepository = productRepository;
    }
    public void Delete(int id)
    {
        _productRepository.Delete(id);
    }
}

Public void ConfigureServices(IServiceCollection services){
  services.AddMvc();
}

Public void Configure(IApplicationBuilder app, IHostingEnvironment env){
  app.UseMvc();
}

public void ConfigureServices(IServiceCollection services)
{
    services.AddRouting();
}

// This method gets called by the runtime. Use this method to configure the HTTP requ
public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
{
    var trackPackageRouteHandler = new RouteHandler(context =>
    {
        var routeValues = context.GetRouteData().Values;
        return context.Response.WriteAsync($"路由值:{routeValues.ToString()}");
    });

    var routeBuilder = new RouteBuilder(app,trackPackageRouteHandler);
    routeBuilder.MapRoute("Track Package Route","package/{operation}/{id:int}");

    routeBuilder.MapGet("hello/{name}", context =>
    {
        var name = context.GetRouteValue("name");
        return context.Response.WriteAsync($"Hi {name}");
    });

    var routes = routeBuilder.Build();
    app.UseRouter(routes);
}

public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
{
    app.UseMvc(routes =>
    {
        routes.MapRoute(
            template:$"/{action}");
    });
}

routes.MapRoute(
	template: "{controller}/{action}/{id?}",
  defaults: new { controller = "Home", action = "Index"}
)

routes.MapRoute(
  "default": "{Controller=Home}/{action=Index}/{id?}"
)

public class HomeController : Controller{
  public IActionResult Index(){
    return Ok("Hello");
  }
  
   public IActionResult Welcome(){
    return Ok("Hello,Your id:" + id);
  }
}

public class HomeController: Controller{
  
  [Route("")]
	[Route("Home/Index")]
	[Route("AnotherOne")]
	public IActionResult Index()
	{
    return Ok("Hello");
	}
}

[Route("[action]/{name?}")]
public IActionResult Welcome(string name){
  ...
}

[HttpGet("{id:int}")]
public IActionResult Welcome(int id){
  ...
}

using Microsoft.AspNetCore.Mvc;

public class HomeController : Controller{
  
}

return StatusCode(Microsoft.AspNetCore.Http.StatusCodes.Status100Continue);

var result = new OkObjectResult(new { message ="操作成功",currentDate = DateTime.Now});
return result;

//重定向到指定的URL
return Redirect("http://www.microsoft.com/");
//重新定向到当前应用程序中美的另一个URL
return LocalRedirect("/account/login");
//重定向到指定的Action
return RedirectToAction("login");
//重定向到指定的路由
return RedirectToRoute("default",new { action="logion",controller = "account"});

return JsonResult(new { message="This is a JSON result.",data=DateTime.Now});
return Content("返回字符串");

[HttpGet("{id}")]
public ActionResult<Employee> Get(long id)
{
    if (id<=0)
    {
        return BadRequest();
    }

    var employee = new Employee(id);

    if (employee == null)
    {
        return NotFound();
    }

    return employee;
}

[Route("api/[controller]")]
public class BlogsControlls : Controller
{
    [HttpGet("[action]/{keyword}")]
    public IActionResult Search(string keyword, int top)
    {
        return NotFound();
    }
}

BinRequiredAttribute:如果没有值绑定到此参数，或绑定不成功，这个特性将添加一个ModelState错误。
BinNeverAttribute:在进行模型绑定时，忽略此参数。

[HttpGet("[action]/{keyword}")]
public IActionResult Post([FromBody] string keyword, [FromHeader]int id)
{
    ...
}

public class BlogDto
{
    [Required]
    public int Id { get; set; }
    [Required, MinLength(10, ErrorMessage = "验证失败，自定义的错误提示信息")]
    public string Title { get; set; }
    [MaxLength(1000)]
    public string Content { get; set; }
    [Url]
    public string Url { get; set; }
    [Range(1,5)]
    public int Level { get; set; }
}

public interface IAsyncActionFilter : IFilterMetadata
{
    Task OnActionExecutionAsync(ActionExecutedContext context,ActionExecutionDelegate next);
}

public interface IActionFilter : IFilterMetadata
{
    void OnActionExecuted(ActionExecutedContext context);
    void OnActionExecuting(ActionExecutingContext context);
}

public class CustomActionFilter : IActionFilter, IAsyncActionFilter
{
    public void OnActionExecuting(ActionExecutingContext context)
    {
        //Action执行前
    }

    public void OnActionExecuted(ActionExecutedContext context)
    {
        //Action执行后
    }

    public Task OnActionExecutionAsync(ActionExecutedContext context, ActionExecutionDelegate next)
    {
        //Action执行前
        next();
        //Action执行后
        return Task.CompletedTask;
    }
}