Core 3.1 MVC 抛异常“InvalidOperationException: No service for type 'Microsoft.

Core 3.1 MVC 抛异常“InvalidOperationException: No service for type 'Microsoft.AspNetCore.Mvc.ViewFeatur

资料来源：网络整理时间：2023/2/14 1:00:52 共计：3652 浏览

.NET Core 的版本是 3.1

遇到的问题是 Action 中 return View() 的时候报错

An unhandled exception occurred while processing the request.

InvalidOperationException: No service for type 'Microsoft.AspNetCore.Mvc.ViewFeatures.ITempDataDictionaryFactory' has been registered.

Microsoft.Extensions.DependencyInjection.ServiceProviderServiceExtensions.GetRequiredService(IServiceProvider provider, Type serviceType)

错误内容的字面意思是 ITempDataDictionaryFactory 这玩意没有注册。

解决方案一：

修改 Startup.cs 中的 ConfigureServices方法

public void ConfigureServices(IServiceCollection services)

{

services.AddMvc();

}

解决方案二：

修改 Startup.cs 中的 ConfigureServices方法

public void ConfigureServices(IServiceCollection services)

{

services.AddControllersWithViews();

}

查看AspNetCore.Mvc 的源码

复制代码

public static IMvcBuilder AddMvc(this IServiceCollection services)

{

if (services == null)

{

throw new ArgumentNullException(nameof(services));

}

services.AddControllersWithViews();

return services.AddRazorPages();

}

复制代码

AddMvc 方法中包含了 AddControllersWithViews

复制代码

public static IMvcBuilder AddControllersWithViews(this IServiceCollection services)

{

if (services == null)

{

throw new ArgumentNullException(nameof(services));

}

var builder = AddControllersWithViewsCore(services);

return new MvcBuilder(builder.Services, builder.PartManager);

}

复制代码

跳转到 AddControllersWithViewsCore

复制代码

private static IMvcCoreBuilder AddControllersWithViewsCore(IServiceCollection services)

{

var builder = AddControllersCore(services)

.AddViews()

.AddRazorViewEngine()

.AddCacheTagHelper();

AddTagHelpersFrameworkParts(builder.PartManager);

return builder;

}

复制代码

跳转到 AddViews

复制代码

public static IMvcCoreBuilder AddViews(this IMvcCoreBuilder builder)

{

if (builder == null)

{

throw new ArgumentNullException(nameof(builder));

}

builder.AddDataAnnotations();

AddViewComponentApplicationPartsProviders(builder.PartManager);

AddViewServices(builder.Services);

return builder;

}

复制代码

跳转到 AddViewServices

复制代码

internal static void AddViewServices(IServiceCollection services)

{

services.AddDataProtection();

services.AddAntiforgery();

services.AddWebEncoders();

services.TryAddEnumerable(

ServiceDescriptor.Transient<IConfigureOptions<MvcViewOptions>, MvcViewOptionsSetup>());

services.TryAddEnumerable(

ServiceDescriptor.Transient<IConfigureOptions<MvcOptions>, TempDataMvcOptionsSetup>());

// View Engine and related infrastructure

services.TryAddSingleton<ICompositeViewEngine, CompositeViewEngine>();

services.TryAddSingleton<IActionResultExecutor<ViewResult>, ViewResultExecutor>();

services.TryAddSingleton<IActionResultExecutor<PartialViewResult>, PartialViewResultExecutor>();

// Support for activating ViewDataDictionary

services.TryAddEnumerable(

ServiceDescriptor

.Transient<IControllerPropertyActivator, ViewDataDictionaryControllerPropertyActivator>());

// HTML Helper

services.TryAddTransient<IHtmlHelper, HtmlHelper>();

services.TryAddTransient(typeof(IHtmlHelper<>), typeof(HtmlHelper<>));

services.TryAddSingleton<IHtmlGenerator, DefaultHtmlGenerator>();

services.TryAddSingleton<ModelExpressionProvider>();

// ModelExpressionProvider caches results. Ensure that it's re-used when the requested type is IModelExpressionProvider.

services.TryAddSingleton<IModelExpressionProvider>(s => s.GetRequiredService<ModelExpressionProvider>());

services.TryAddSingleton<ValidationHtmlAttributeProvider, DefaultValidationHtmlAttributeProvider>();

services.TryAddSingleton<IJsonHelper, SystemTextJsonHelper>();

// Component services for Blazor server-side interop

services.TryAddSingleton<ServerComponentSerializer>();

// View Components

// These do caching so they should stay singleton

services.TryAddSingleton<IViewComponentSelector, DefaultViewComponentSelector>();

services.TryAddSingleton<IViewComponentFactory, DefaultViewComponentFactory>();

services.TryAddSingleton<IViewComponentActivator, DefaultViewComponentActivator>();

services.TryAddSingleton<

IViewComponentDescriptorCollectionProvider,

DefaultViewComponentDescriptorCollectionProvider>();

services.TryAddSingleton<IActionResultExecutor<ViewComponentResult>, ViewComponentResultExecutor>();

services.TryAddSingleton<ViewComponentInvokerCache>();

services.TryAddTransient<IViewComponentDescriptorProvider, DefaultViewComponentDescriptorProvider>();

services.TryAddSingleton<IViewComponentInvokerFactory, DefaultViewComponentInvokerFactory>();

services.TryAddTransient<IViewComponentHelper, DefaultViewComponentHelper>();

// Temp Data

services.TryAddEnumerable(

ServiceDescriptor.Transient<IApplicationModelProvider, TempDataApplicationModelProvider>());

services.TryAddEnumerable(

ServiceDescriptor.Transient<IApplicationModelProvider, ViewDataAttributeApplicationModelProvider>());

services.TryAddSingleton<SaveTempDataFilter>();

// Component rendering

services.TryAddScoped<IComponentRenderer, ComponentRenderer>();

services.TryAddScoped<StaticComponentRenderer>();

services.TryAddScoped<NavigationManager, HttpNavigationManager>();

services.TryAddScoped<IJSRuntime, UnsupportedJavaScriptRuntime>();

services.TryAddScoped<INavigationInterception, UnsupportedNavigationInterception>();

services.TryAddTransient<ControllerSaveTempDataPropertyFilter>();

// This does caching so it should stay singleton

services.TryAddSingleton<ITempDataProvider, CookieTempDataProvider>();

services.TryAddSingleton<TempDataSerializer, DefaultTempDataSerializer>();

// Antiforgery

services.TryAddSingleton<ValidateAntiforgeryTokenAuthorizationFilter>();

services.TryAddSingleton<AutoValidateAntiforgeryTokenAuthorizationFilter>();

// These are stateless so their lifetime isn't really important.

services.TryAddSingleton<ITempDataDictionaryFactory, TempDataDictionaryFactory>();

services.TryAddSingleton(ArrayPool<ViewBufferValue>.Shared);

services.TryAddScoped<IViewBufferScope, MemoryPoolViewBufferScope>();

}

复制代码

找到了 services.TryAddSingleton<ITempDataDictionaryFactory, TempDataDictionaryFactory>();

这一段绑定的代码。

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