I have a problem with the Html.BeginForm() function, where every time I press the OkButton submit in _Prijava.cshtml, it runs the Prijava() Action in the Controller.

This is the LoginController.cs:

namespace BumCoreWebAppMVC.Controllers
{
    [Route("[controller]/[action]")]
    public class LoginController : Controller
    {
        [HttpGet] 
        [Route("/bum/Prijava.cshtml")]   
        public IActionResult Prijava()
        {
            var model = new LoginViewModel();
            return View("Prijava", model);
        }

        [HttpPost]
        public IActionResult OkButton(LoginViewModel model)
        {
            //...
            return View("Index");
        }
    }
}

This is the view Prijava.cshtml

@model BumCoreWebAppMVC.Models.LoginViewModel
@{
    ViewData["TitleHeader"] = "Prijava";
    Layout = "./BumLayout";
}
<!-- ... -->
@await Html.PartialAsync("/Views/Login/_Prijava.cshtml", Model)
<!-- ... -->

This is the partial view _Prijava.cshtml

@model BumCoreWebAppMVC.Models.LoginViewModel
@{}
@using (Html.BeginForm("OkButton", "Login", FormMethod.Post)){
    @Html.TextBoxFor(p => p.TextBox_ID, new {@, placeholder = "ID"})       
    <button type="submit">Submit</button>
}

From what i've seen this should be work. I have a suspicion that maybe my Program.cs isn't correctly set:

var builder = WebApplication.CreateBuilder(args);

// Add services to the container.
builder.Services.AddControllersWithViews();
builder.Services.AddHttpContextAccessor();
builder.Services.AddSingleton<HttpContextAccessor>();
builder.Services.AddDistributedMemoryCache();
builder.Services.AddSession();

var app = builder.Build();

// Configure the HTTP request pipeline.
if (!app.Environment.IsDevelopment())
{
    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.UseCookiePolicy();
app.UseSession();
app.UseRouting();
app.UseAuthorization();
app.MapControllers();

app.Run();

The strange thing is if I change the OkButton() Action to [HttpGet] and use @Html.ActionLink("Submit", "OkButton", "Login") it works just fine and it can find the correct Action. However the Html.BeginForm("OkButton", "Login", FormMethod.Get) will still not be able to run it.

CodePudding user response：

This is because you are not set the Attribute Routing in RouteConfig.cs file.

Inside Solution Explorer navigate to App_Start folder and open RouteConfig.cs file.

Add the following line bellow routes.IgnoreRoute("{resource}.axd/{*pathInfo}"); line

routes.IgnoreRoute...;
routes.MapMvcAttributeRoutes();

Final Step: Don't use a trailing slash at the beginning of a Route attribute. Replace your route with this line

[Route("bum/Prijava.cshtml")]

Demonstration Video

CodePudding user response：

I've found the most mind boggling solution.

It appears that the first @using (Html.BeginForm()) will always call the wrong Action but the next ones will work correctly. So simply adding @using (Html.BeginForm()){ } at the top of the _Prijava.cshtml page will make the other ones work.