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app.MapControllerRoute( name: "default", pattern: "{controller=Home}/{action=Index}/{id?}");

...

...

@model Product@{ ViewData["Title"] = "新增";}
 
 名称： 
  
 
 
 价格 
  
 
 
 数量 
  
 
 
 新增 

public IActionResult Create(){ return View();}[HttpPost]public IActionResult Create(Product product){ return RedirectToAction("Index");}

....

@model Product@{ ViewData["Title"] = "Create";}
 // removed for clarity

[HttpPost][ValidateAntiForgeryToken]public IActionResult Create(Product product){ return RedirectToAction("Index");}

public ViewResult Edit() => View("Create", _repository.Products.Last());

 Select Quantity

using AspNetCore.BuiltInTagHelpers.Models;using Microsoft.AspNetCore.Mvc;using Microsoft.AspNetCore.Mvc.Rendering;using System.Diagnostics;using static AspNetCore.BuiltInTagHelpers.Models.Repository;namespace AspNetCore.BuiltInTagHelpers.Controllers{ public class HomeController : Controller { private readonly ILogger _logger;
 private readonly IRepository _repository; public HomeController(IRepository repository, ILogger logger) { _repository = repository; _logger = logger; } public ViewResult Edit() { ViewBag.Quantity = new SelectList(_repository.Products.Select(p => p.Quantity).Distinct()); return View("Create", _repository.Products.Last()); } public IActionResult Index() { return View(_repository.Products); } public IActionResult Create() { ViewBag.Quantity = new SelectList(_repository.Products.Select(p => p.Quantity).Distinct()); return View(); } [HttpPost] [ValidateAntiForgeryToken] public IActionResult Create(Product product) { _repository.AddProduct(product); return RedirectToAction("Index"); } public IActionResult Privacy() { return View(); } [ResponseCache(Duration = 0, Location = ResponseCacheLocation.None, NoStore = true)] public IActionResult Error() { return View(new ErrorViewModel { RequestId = Activity.Current?.Id ?? HttpContext.TraceIdentifier }); } }}

 Some Content 

 
 
 
  Date Time: @DateTime.Now.ToString("HH:mm:ss")  
 @RenderBody() 
 

<cache expires-after="@TimeSpan.FromSeconds(20)"> Date Time: @DateTime.Now.ToString("HH:mm:ss")</cache>

 Date Time: @DateTime.Now.ToString("HH:mm:ss")

 Date Time: @DateTime.Now.ToString("HH:mm:ss")

<cache expires-sliding="@TimeSpan.FromSeconds(20)" vary-by="@ViewContext.RouteData.Values["action"]"> Date Time: @DateTime.Now.ToString("HH:mm:ss")</cache>

@{ ViewData["Title"] = "Home Page";}@model IEnumerable
 
 
 新增 
 
 
 
 
 
 
          @foreach (var product in Model) {      }  
名称
价格
数量
@product.Name
@product.Price
@product.Quantity 
 

新增

<a class="btn btn-primary" asp-action="Create">新增</a>

<a class="btn btn-dark" href="/Home/Create/20">新增</a>

bootstrap.jsbootstrap.bundle.jsbootstrap.esm.jsbootstrap.js.mapbootstrap.min.js

<script asp-src-include="lib/bootstrap/**/*bundle.js"></script>

<script asp-src-include="/lib/bootstrap/**/b*.js" asp-src-exclude="**.slim.*,**.min.*,**.bundle.*"></script>

<script src="/lib/bootstrap/dist/js/bootstrap.js"></script><script src="/lib/bootstrap/dist/js/bootstrap.esm.js"></script>

<script asp-src-include="/lib/bootstrap/**/b*.js" asp-src-exclude="**.slim.*,**.min.*,**.bundle.*" asp-append-version="true"></script>

<script src="http://ajax.aspnetcdn.com/ajax/jQuery/jquery-3.2.1.min.js" asp-fallback-src-include="/lib/jquery/**/*.min.js" asp-fallback-src-exclude="**.slim.**" asp-fallback-test="window.jQuery"></script>