上传文档后的 RedirectToAction 不起作用

Question

我定义了一个简单的视图，要求用户选择要上传的文件。该文件存储在模型（视图的模型）中，然后在 POST 方法中进行处理。文件上传后，我将新模型（文件的结果）保存到 TempData 中，以便将其传递给下一个要显示的视图，稍后由用户验证内容。

一切正常，直到 redirecttoaction 什么也没做，我不知道我在这里做错了什么

这是我所做的一个例子：

[HttpGet]
        public IActionResult Index()
        {
            return View();
        }

        [HttpPost]
        public IActionResult Index(ImportIndexViewModel model)
        {
            if (!ModelState.IsValid)
                return View(model);

            if (model.File == null)
            {
                ModelState.AddModelError("File", "File is null");
                return View(model);
            }

            var extension = Path.GetExtension(model.FileName);

            if (extension != ".xlsx")
            {
                ModelState.AddModelError("File extension", "File type is not authorized. Please use the correct template file");
                return View(model);
            }

            var uploads = Path.Combine(_webHostEnvironment.WebRootPath, "uploads");

            if (model.File.Length <= 0)
            {
                ModelState.AddModelError("File size", "File length is <= 0");
                return View(model);
            }

            var resultModel = InterclubsApiClient.GetInterclubsReaderModel(model.File, uploads).GetAwaiter().GetResult();
            TempData.Put<InterclubsReaderModel>("InterclubsReaderModel", resultModel);
            return RedirectToAction(nameof(ImportController.Upload), typeof(ImportController).GetControllerName());
        }

        [HttpGet]
        public IActionResult Upload()
        {
            var model = TempData.Get<InterclubsReaderModel>("InterclubsReaderModel");
            if (model == null)
                return BadRequest(ErrorHelper.GetModelStateDictionary("InterclubsReaderModel", "Model is null when retrieved from TempData"));

            return View(model);
        }

正在上传，因为我可以在上传文件夹中找到该文件。该模型也是正确的，因为我可以在其中找到值，但为什么重定向不起作用？

相反，该页面停留在那里，我无法对其进行任何操作。如果我使用 Chrome，它会说该网站无法访问（就像 IIS 缺少 link）。

感谢您的帮助。

编辑：回答问题：您确定这是 nameof(...) 给出的正确方法名称吗这里是：

第二次编辑：你们觉得这里有什么不对吗？

public class Startup
    {
        public IConfiguration Configuration { get; }
        public IWebHostEnvironment Environment { get; }

        #region Constructor

        public Startup(IConfiguration configuration, IWebHostEnvironment env)
        {
            Configuration = configuration;
            Environment = env;
        }

        #endregion

        #region Configure services

        // This method gets called by the runtime. Use this method to add services to the container.
        public void ConfigureServices(IServiceCollection services)
        {
            services
                .AddAuthentication("InterclubsCookieAuth")
                .AddCookie("InterclubsCookieAuth", config =>
                {
                    config.Cookie.Name = "Interclubs.Cookie";
                    config.LoginPath = "/Connect/Login";
                    config.LogoutPath = "/Connect/Logout";
                    config.ExpireTimeSpan = TimeSpan.FromHours(15);
                });

            services.AddAuthorization(config =>
            {
                var defaultAuthBuilder = new AuthorizationPolicyBuilder("InterclubsCookieAuth");
                var defaultAuthPolicy = defaultAuthBuilder
                    .RequireAuthenticatedUser()
                    .Build();

                config.DefaultPolicy = defaultAuthPolicy;
            });

            services.AddHttpContextAccessor();

            services.AddMemoryCache();
            services.AddSession();
            services.AddMvc(options =>
            {
                options.EnableEndpointRouting = false;
            });

            services.AddSingleton<IHttpContextAccessor, HttpContextAccessor>();

            // Enables .Net Core to refresh updated views in browser while debugging
            var builder = services.AddControllersWithViews();
            builder.AddRazorRuntimeCompilation(options =>
            {
                var libraryPath = Path.GetFullPath(Path.Combine(Environment.ContentRootPath));
                options.FileProviders.Add(new PhysicalFileProvider(libraryPath));
            });
        }

        #endregion

        #region Configuration

        // 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($"/{typeof(HomeController).GetControllerName()}/{nameof(HomeController.Error)}");
                app.UseHsts(options => options.MaxAge(days: 365).IncludeSubdomains());
            }

            app.UseXContentTypeOptions();
            app.UseXfo(options => options.SameOrigin());
            app.UseXXssProtection(options => options.EnabledWithBlockMode());
            app.UseReferrerPolicy(options => options.NoReferrer());
            app.UseHttpsRedirection();

            var contentTypeProvider = new FileExtensionContentTypeProvider();

            if (!contentTypeProvider.Mappings.ContainsKey(".svg"))
            {
                contentTypeProvider.Mappings.Add(".svg", "image/svg+xml");
            }
            if (!contentTypeProvider.Mappings.ContainsKey(".woff"))
            {
                contentTypeProvider.Mappings.Add(".woff", "application/font-woff");
            }
            if (!contentTypeProvider.Mappings.ContainsKey(".woff2"))
            {
                contentTypeProvider.Mappings.Add(".woff2", "application/font-woff2");
            }

            var staticFilesOptions = new StaticFileOptions
            {
                ContentTypeProvider = contentTypeProvider
            };

            app.UseStaticFiles(staticFilesOptions);
            app.UseSession();
            app.UseAuthentication();
            app.UseAuthorization();

            app.UseMvc(routes =>
            {
                routes.MapRoute(
                    name: "default",
                    template: $"{{controller={typeof(ConnectController).GetControllerName()}}}/{{action={nameof(ConnectController.Login)}}}");
            });
        }

        #endregion
    }

Answer 1

我解决了：它来自 TempData。在我使用的.NetCore 3.0 中，TempData 需要使用Cookies 或Session。我启用了会话，然后重定向又开始工作了，而没有对我的代码进行任何更改！希望这会对其他人有所帮助。

上传文档后的 RedirectToAction 不起作用

RedirectToAction after uploading a document is not working

c#

asp.net-mvc

post-redirect-get

asp.net-core