C#•2mo ago

✅ MVC application routing issue.

Why does the following code not work

                        <div>
                            <a asp-route-productId="@product.Id"
                               class="btn btn-primary bg-gradient border-0 form-control">
                                Details
                            </a>
                        </div>

                        <div>
                            <a asp-route-productId="@product.Id"
                               class="btn btn-primary bg-gradient border-0 form-control">
                                Details
                            </a>
                        </div>

But this code does

                        <div>
                            <a href="@Url.Action("Details", "Home", new { productId = product.Id })"
                               class="btn btn-primary bg-gradient border-0 form-control">
                                Details
                            </a>
                        </div>

                        <div>
                            <a href="@Url.Action("Details", "Home", new { productId = product.Id })"
                               class="btn btn-primary bg-gradient border-0 form-control">
                                Details
                            </a>
                        </div>

32 Replies

Angius•2mo ago

Because you did not specify the route Only the parameter of that route You need at least asp-action to point to the action the link supposed to link to And maybe even asp-controller if the controller is not the current one The second piece of code contains all those details, so it works

Cydo•2mo ago

If you mean like so, the same issue persists.

                            <a
                                asp-controller="Home"
                                asp-action="Details"
                                asp-route-productId="@product.Id"
                                class="btn btn-primary bg-gradient border-0 form-control">
                                Details
                            </a>

                            <a
                                asp-controller="Home"
                                asp-action="Details"
                                asp-route-productId="@product.Id"
                                class="btn btn-primary bg-gradient border-0 form-control">
                                Details
                            </a>

Cydo•2mo ago

I dont even get syntax highlighting with this

Angius•2mo ago

Huh Show the signature of the controller and action? Also, what .NET version?

Cydo•2mo ago

.net 8.0 HomeController.cs

public IActionResult Details(int productId)
    {
        ShoppingCart cart = new()
        {
            Product = _unitOfWork.Product.GetFirstOrDefault(u => u.Id == productId, includeProperties: "Category"),
            Count = 1,
            ProductId = productId
        };
        return View(cart);
    }

    [HttpPost]
    [Authorize]
    public IActionResult Details(ShoppingCart shoppingCart)
    {
        Debug.WriteLine($"Count: {shoppingCart.Count}");


        var claimsIdentity = (ClaimsIdentity)User.Identity;
        var userId = claimsIdentity.FindFirst(ClaimTypes.NameIdentifier).Value;
        shoppingCart.ApplicationUserId = userId;

        ShoppingCart cartFromDb = _unitOfWork.ShoppingCart.GetFirstOrDefault(u =>
            u.ApplicationUserId == userId && u.ProductId == shoppingCart.ProductId);

        if (cartFromDb != null)
        {
            cartFromDb.Count += shoppingCart.Count;
            _unitOfWork.ShoppingCart.Update(cartFromDb);
        }
        else
        {
            _unitOfWork.ShoppingCart.Add(shoppingCart); 
        }


        
        _unitOfWork.Save();

        return RedirectToAction(nameof(Index));
    }

public IActionResult Details(int productId)
    {
        ShoppingCart cart = new()
        {
            Product = _unitOfWork.Product.GetFirstOrDefault(u => u.Id == productId, includeProperties: "Category"),
            Count = 1,
            ProductId = productId
        };
        return View(cart);
    }

    [HttpPost]
    [Authorize]
    public IActionResult Details(ShoppingCart shoppingCart)
    {
        Debug.WriteLine($"Count: {shoppingCart.Count}");


        var claimsIdentity = (ClaimsIdentity)User.Identity;
        var userId = claimsIdentity.FindFirst(ClaimTypes.NameIdentifier).Value;
        shoppingCart.ApplicationUserId = userId;

        ShoppingCart cartFromDb = _unitOfWork.ShoppingCart.GetFirstOrDefault(u =>
            u.ApplicationUserId == userId && u.ProductId == shoppingCart.ProductId);

        if (cartFromDb != null)
        {
            cartFromDb.Count += shoppingCart.Count;
            _unitOfWork.ShoppingCart.Update(cartFromDb);
        }
        else
        {
            _unitOfWork.ShoppingCart.Add(shoppingCart); 
        }


        
        _unitOfWork.Save();

        return RedirectToAction(nameof(Index));
    }

Angius•2mo ago

public IActionResult Details(int productId)

I assume it's a [HttpGet] action?

Cydo•2mo ago

yes should i put the annotation aboive it regardless?

Angius•2mo ago

Well, yeah? Attributes is how you do routing

Cydo•2mo ago

im following a course for .net mvc and he didnt do it, so i didnt do it lol

Angius•2mo ago

If you don't tell ASP that it's a GET endpoint, how is it supposed to know?

Cydo•2mo ago

Even with that, it doesnt work the way it should

Angius•2mo ago

huh What HTML gets generated?

Cydo•2mo ago

Angius•2mo ago

Well that's weird

Cydo•2mo ago

yeah lol

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✅ MVC application routing issue.