Session problem.Why "Continue shopping" does not work? - asp.net-core

Question

I have this view with some product list. List from different table
<form method="get">
<td class="button13"><button type="submit" asp-action="Buy" asp-route-id="#p.ProductId" asp-controller="Search">Buy</button></td>
<input type="hidden" name="returnUrl" value="#ViewContext.HttpContext.Request.PathAndQuery()" />
</form>
Then we go to form post to add some information about client. And then we will go to cart
Controller
public ViewResult Index(string returnUrl)
{
return View(new CartIndexViewModel
{
Cart = GetCart(),
ReturnUrl = returnUrl
});
}
public ActionResult AddToCart(string returnUrl,int priceCart,DateTime dateFromCart, int Tick,int Fli)
{//we are here after form post
Cart cart = GetCart();
cart.AddItem(1,priceCart,dateFromCart);
SaveCart(cart);
return RedirectToAction("Index", new { returnUrl });
}
private Cart GetCart()
{
Cart cart = HttpContext.Session.GetJson<Cart>("Cart") ?? new Cart();
return cart;
}
private void SaveCart(Cart cart)
{
HttpContext.Session.SetJson("Cart", cart);
}
Second View
#model Phone1.Models.ViewModels.CartIndexViewModel;
<h2>Your cart</h2>
<table class="table table-bordered table-striped">
<thead>
<tr>
<th>Quantity</th>
<th>Item</th>
<th class="text-right">Price</th>
<th class="text-right">Subtotal</th>
</tr>
</thead>
<tbody>
#foreach (var line in Model.Cart.Lines)
{
<tr>
<td class="text-center">#line.Quantity</td>
<td class="text-left">#line.PriceCart</td>
<td class="text-left">#line.DateFromCart.ToString("D")"</td>
</tr>
}
</tbody>
<tfoot>
<tr>
<td colspan="3" class="text-right">Total:</td>
<td class="text-right">
#Model.Cart.ComputeTotalValue().ToString("c")
</td>
</tr>
</tfoot>
</table>
<div class="text-center">
<a class="btn btn-primary" href="#Model.ReturnUrl"><h3>Continue shopping</h3></a>
</div>
And Infrastructure files
using Microsoft.AspNetCore.Http;
using Newtonsoft.Json;
namespace Phone1.Infrastructure
{
public static class SessionExtensions
{
public static void SetJson(this ISession session, string key, object value)
{
session.SetString(key, JsonConvert.SerializeObject(value));
}
public static T GetJson<T>(this ISession session, string key)
{
var sessionData = session.GetString(key);
return sessionData == null
? default(T) : JsonConvert.DeserializeObject<T>(sessionData);
}
}
}
And other Infrasructure`s file
using Microsoft.AspNetCore.Http;
namespace Phone1.Infrastructure
{
public static class UrlExtensions
{
public static string PathAndQuery(this HttpRequest request) =>
request.QueryString.HasValue
? $"{request.Path}{request.QueryString}"
: request.Path.ToString();
}
}
Startup
public class Startup
{
public Startup(IConfiguration configuration) =>
Configuration = configuration;
public IConfiguration Configuration { get; }
public void ConfigureServices(IServiceCollection services)
{
services.AddDbContext<PhoneAppDbContext>(options =>
options.UseSqlServer(Configuration["Data:PhoneAppDb:ConnectionString"]));
services.AddMvc();
services.AddMemoryCache();
services.AddSession();
services.AddControllersWithViews(mvcOtions =>
{
mvcOtions.EnableEndpointRouting = false;
});
services.AddMvc()
.AddRazorRuntimeCompilation();
}
public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
{
if (env.IsDevelopment())
{
app.UseDeveloperExceptionPage();
}
app.UseStatusCodePages();
app.UseStaticFiles();
app.UseSession();
app.UseMvc(routes => {
routes.MapRoute(
name: "default",
template: "{controller=Home}/{action=Index}/{id?}");
routes.MapRoute(
name: "",
template: "{controller=SearchTicket}/{action=AddToCart}/{id?}");
routes.MapRoute(
name: "",
template: "{controller=SearchTicket}/{action=Index}/{id?}");
});
}
}
}
Model 1
namespace Phone1.Models.ViewModels
{
public class CartIndexViewModel
{
public Cart Cart { get; set; }
public string ReturnUrl { get; set; }
}
}
Model 2
using System;
using System.Collections.Generic;
using System.Linq;
namespace Phone1.Models
{
public class Cart
{
private List<CartLine> lineCollection = new List<CartLine>();
public virtual void AddItem(int quantity,int priceCart,DateTime dateFromCart)
{
CartLine line = lineCollection
.FirstOrDefault();
if (line == null)
{
lineCollection.Add(new CartLine
{
DateFromCart=dateFromCart,
PriceCart=priceCart,
Quantity = quantity
});
}
else
{
//line.Quantity += quantity;
}
}
public virtual void RemoveLine(int priceCart,DateTime dateFromCart) =>
lineCollection.RemoveAll();
public virtual int ComputeTotalValue() =>
lineCollection.Sum(e => e.PriceCart);
//* e.Quantity
public virtual void Clear() => lineCollection.Clear();
public virtual IEnumerable<CartLine> Lines => lineCollection;
}
public class CartLine
{
public int CartLineId { get; set; }
public DateTime DateFromCart { get; set; }
public int PriceCart { get; set; }
public int Quantity { get; set; }
}
}
All things add to cart, but <a class="btn btn-primary" href="#Model.ReturnUrl"><h3>Continue shopping</h3></a> does not work at all.It does not work even like link <a>.What is wrong?
There is no error message.
Controller
public ViewResult Index(string returnUrl)
{
return View(new CartIndexViewModel
{
Cart = GetCart(),
ReturnUrl = returnUrl
});
}
public ActionResult AddToCart(string returnUrl,int priceCart,DateTime dateFromCart, int Tick,int Fli)
{//we are here after form post
Cart cart = GetCart();
cart.AddItem(1,priceCart,dateFromCart);
SaveCart(cart);
return RedirectToAction("Index", new { returnUrl });
}
We go to Index method with returnUrl