在asp.net core 2.2中显示url slug而不是id

看来您想让id在url中不可见，简单的方法是将Delete动作更改为post类型。

Index.cshtml：

<table class="table">
<thead>
    <tr>
        <th>
            @Html.DisplayNameFor(model => model.Name)
        </th>
    </tr>
</thead>
<tbody>
@foreach (var item in Model) {
    <tr>
        <td>
            @Html.DisplayFor(modelItem => item.Name)
        </td>
        <td>
            <form method="post" asp-action="Delete" asp-controller="Sprays">
                <input type="hidden" value="@item.Id" name="id" />
                <input type="submit" value="Delete" />
           </form>
        </td>
    </tr>
}
    </tbody>
</table>

控制器：

[HttpPost]
public ActionResult Delete(int? id)
{
     //..
}

[HttpPost]
//[ActionName("Delete")]    
public async Task<IActionResult> DeleteConfirm(int? id)
{
    //...
}

确保您的Delete.cshtml应该如下所示：

<form asp-action="DeleteConfirm" method="post" enctype="multipart/form-data">

结果：

更新：

Index.cshtml：

<form method="post" asp-action="Delete" asp-controller="Sprays" asp-route-slug="my-delete-id">
      <input type="hidden" value="@item.Id" name="id" />
      <input type="submit" value="Delete" />
</form>

控制器：

[HttpPost]
public async Task<IActionResult> Delete(string slug)
{
    var data = HttpContext.Request.Form["id"].First();
    var id = int.Parse(data);
    //...
}
[HttpPost]
//[ActionName("Delete")]    
public async Task<IActionResult> DeleteConfirm(int? id)
{
    //...
}

Startup.cs：

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

结果：

整个控制器：

public class TestsController : Controller
{
    private readonly MyDbContext _context;

    public TestsController(MyDbContext context)
    {
        _context = context;
    }

    // GET: Tests
    public async Task<IActionResult> Index()
    {
        return View(await _context.Test.ToListAsync());
    }

    // GET: Tests/Details/5
    public async Task<IActionResult> Details(int? id)
    {
        if (id == null)
        {
            return NotFound();
        }
        var test = await _context.Test
            .FirstOrDefaultAsync(m => m.Id == id);
        if (test == null)
        {
            return NotFound();
        }

        return View(test);
    }

    // GET: Tests/Create
    public IActionResult Create()
    {
        return View();
    }
    [HttpPost]
    [ValidateAntiForgeryToken]
    public async Task<IActionResult> Create([Bind("Id,Name")] Test test)
    {
        if (ModelState.IsValid)
        {
            _context.Add(test);
            await _context.SaveChangesAsync();
            return RedirectToAction(nameof(Index));
        }
        return View(test);
    }

    // GET: Tests/Edit/5
    public async Task<IActionResult> Edit(int? id)
    {
        if (id == null)
        {
            return NotFound();
        }

        var test = await _context.Test.FindAsync(id);
        if (test == null)
        {
            return NotFound();
        }
        return View(test);
    }

    [HttpPost]
    [ValidateAntiForgeryToken]
    public async Task<IActionResult> Edit(int id, [Bind("Id,Name")] Test test)
    {
        if (id != test.Id)
        {
            return NotFound();
        }

        if (ModelState.IsValid)
        {
            try
            {
                _context.Update(test);
                await _context.SaveChangesAsync();
            }
            catch (DbUpdateConcurrencyException)
            {
                if (!TestExists(test.Id))
                {
                    return NotFound();
                }
                else
                {
                    throw;
                }
            }
            return RedirectToAction(nameof(Index));
        }
        return View(test);
    }

    [HttpPost]
    public async Task<IActionResult> Delete(string slug)
    {
        var data = HttpContext.Request.Form["id"].First();
        var id = int.Parse(data);
        var test = await _context.Test
            .FirstOrDefaultAsync(m => m.Id == id);
        if (test == null)
        {
            return NotFound();
        }

        return View(test);
    }
    [HttpPost]
    [ValidateAntiForgeryToken]
    public async Task<IActionResult> DeleteConfirmed(int id)
    {
        var test = await _context.Test.FindAsync(id);
        _context.Test.Remove(test);
        await _context.SaveChangesAsync();
        return RedirectToAction(nameof(Index));
    }

    private bool TestExists(int id)
    {
        return _context.Test.Any(e => e.Id == id);
    }
}

整个Startup.cs：

public void ConfigureServices(IServiceCollection services)
{
    services.AddControllersWithViews();
    services.AddDbContext<MyDbContext>(options =>              options.UseSqlServer(Configuration.GetConnectionString("MyDbContext")));
}

// This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
{
    if (env.IsDevelopment())
    {
        app.UseDeveloperExceptionPage();
    }
    else
    {
        app.UseExceptionHandler("/Home/Error");
        // The default HSTS value is 30 days. You may want to change this for production scenarios, see https://aka.ms/aspnetcore-hsts.
        app.UseHsts();
    }
    app.UseHttpsRedirection();
    app.UseStaticFiles();

    app.UseRouting();

    app.UseAuthorization();

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