ASP.NET Core 3.1 路由 - API 和 MVC 路由混淆

Question

我的应用程序中有两个控制器。一个是 api 控制器，另一个是 mvc 控制器。我的路线是这样的：

api: /api/account/login

mvc: /account/login

我的控制器：

[ApiController]
[Route("api/[controller]")]
public class AccountController : ControllerBase
{
    private readonly IMediator _mediator;

    public AccountController(
        IMediator mediator)
    {
        _mediator = mediator;
    }

    [HttpPost("login")]
    public async Task<AuthenticationResultViewModel> Login(LoginRequest loginData, CancellationToken cancellationToken) 
        => await _mediator.Send(loginData, cancellationToken);
}

// this one's in a different namespace
[Route("[controller]")]
public class AccountController : Controller
{
    private readonly IMediator _mediator;

    public AccountController(
        IMediator mediator)
    {
        _mediator = mediator;
    }

    [HttpGet("login")]
    public IActionResult Login([FromQuery] string r)
        => View();

    [HttpPost("login")]
    public async Task<IActionResult> Login([FromQuery] string r, [FromForm] LoginRequest login, CancellationToken cancellationToken)
    {
        await _mediator.Send(login, cancellationToken);

        if (!string.IsNullOrWhiteSpace(r))
            return Redirect(r);
        
        return RedirectToAction("Index", "Home");
    }
}

我的服务收藏：

//...
services.Configure<RouteOptions>(options => options.LowercaseUrls = true);
services.AddControllersWithViews()
//...

我的管道是这样的：

app.UseResponseCaching();
app.UseResponseCompression();

app.UseCors();

app.UseRouting();

app.UseAuthentication();
app.UseAuthorization();

// here i tried defining my routes 
app.UseEndpoints(endpoints =>
{
    endpoints.MapControllers();
    // I have tried the following without success
    // I'm actually lost :'(
    //endpoints.MapControllerRoute("mvc", "{controller}/{action}/{id?}", new { controller = "Home", action = "Index" });
    //endpoints.MapControllerRoute("api", "api/{controller}/{action}/{id?}");
});

app.UseForwardedHeaders(new ForwardedHeadersOptions
{
    ForwardedHeaders = ForwardedHeaders.All,
    RequireHeaderSymmetry = false
});

现在我的实际问题是：

当我在我的视图中使用 UrlHelper 时，它总是 return 是 api 路由！

<form action="@Url.Action("Login", "Account")" method="post">
    <div class="form-group">
        <input asp-for="Username" type="text" placeholder="Username" />
    </div>
    <div class="form-group">
        <input asp-for="Password" type="password" placeholder="Password"/>
    </div>
    <div class="form-group">
        <button type="submit">Login</button>
    </div>
</form>

@Url.Action("Login", "Account") => /api/account/login

为什么会这样？
如何使 UrlHelper return 在我的视图中成为我的 MVC 路由？

Answer 1

@Url.Action("Login", "Account") => /api/account/login

Why does this happen? How can I make the UrlHelper return my MVC route in my views?

似乎通过使用 Url.Action 方法，它将自动使用 API 路由，而不是 MVC 路由。

要使 UrlHelper return 成为 MVC 视图，您可以使用 Url.RouteUrl() 方法分配路由名称，或使用 Url.Content() 设置正确的 URL。代码如下：

使用Url.RouteUrl()方法:

 <form action="@Url.RouteUrl("defaultmvc", new { controller="Account", action = "Login" })" method="post">

StartUp.cs中的代码：

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

使用Url.Content()方法:

   <form action="@Url.Content("~/Account/login")" method="post">

那么，html资源如下：

       <form action="/Account/login" method="post">
            ...
        </form>

ASP.NET Core 3.1 路由 - API 和 MVC 路由混淆

ASP.NET Core 3.1 Routing - API and MVC Route confusion

c#

routes

asp.net-routing

asp.net-core