正在努力处理此错误消息一段时间。一个奇怪的方面是，当我在计算机上的Visual Studio中运行该应用程序时，不会发生这种情况，但是当我在服务器上发布该应用程序时，就会发生这种情况。
我遵循了本教程https://long2know.com/2017/08/rendering-and-emailing-embedded-razor-views-with-net-core/
主要Web应用程序项目的软件包：
<Project Sdk="Microsoft.NET.Sdk.Web">
<PropertyGroup>
<TargetFramework>netcoreapp2.1</TargetFramework>
</PropertyGroup>
<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|AnyCPU'">
<DocumentationFile>SalesPortals.Services.WebHost.xml</DocumentationFile>
<PreserveCompilationContext>true</PreserveCompilationContext>
<MvcRazorExcludeRefAssembliesFromPublish>false</MvcRazorExcludeRefAssembliesFromPublish>
<NoWarn>1701;1702;CS1591</NoWarn>
</PropertyGroup>
<ItemGroup>
<PackageReference Include="AutoMapper" Version="8.0.0" />
<PackageReference Include="DinkToPdf" Version="1.0.8" />
<PackageReference Include="Microsoft.ApplicationInsights.AspNetCore" Version="2.6.1" />
<PackageReference Include="Microsoft.AspNetCore.App" Version="2.1.1" />
<PackageReference Include="Swashbuckle.AspNetCore" Version="4.0.1" />
</ItemGroup>
用于编译模板的项目的软件包：
<Project Sdk="Microsoft.NET.Sdk">
<PropertyGroup>
<TargetFramework>netcoreapp2.1</TargetFramework>
</PropertyGroup>
<ItemGroup>
<PackageReference Include="Microsoft.AspNetCore.Mvc.Razor" Version="2.1.1" />
<PackageReference Include="Microsoft.Extensions.FileProviders.Embedded" Version="2.1.1" />
</ItemGroup>
<ItemGroup>
<EmbeddedResource Include="Templates\**\*.cshtml">
<CopyToOutputDirectory>Never</CopyToOutputDirectory>
<CopyToPublishDirectory>PreserveNewest</CopyToPublishDirectory>
<Pack>$(IncludeRazorContentInPack)</Pack>
</EmbeddedResource>
</ItemGroup>
</Project>
我有这个html：
@using Templates_v1 = SalesPortals.Services.Templating.Models.v1
@model SalesPortals.Services.Templating.Models.v1.HelloWorldTemplateModel
<h1>Hello World Template</h1>
<h4>
The greatest template that ever lived
</h4>
<p>
<strong>Hello </strong>@Model.Hello
</p>
渲染发生在这里：
public class ViewRenderer : IViewRenderer
{
/// <summary>
/// From https://long2know.com/2017/08/rendering-and-emailing-embedded-razor-views-with-net-core/
/// </summary>
private readonly IRazorViewEngine _viewEngine;
private readonly ITempDataProvider _tempDataProvider;
private readonly IServiceProvider _serviceProvider;
public ViewRenderer(
IRazorViewEngine viewEngine,
ITempDataProvider tempDataProvider,
IServiceProvider serviceProvider)
{
_viewEngine = viewEngine;
_tempDataProvider = tempDataProvider;
_serviceProvider = serviceProvider;
}
public async Task<string> RenderToStringAsync<TModel>(string viewName, TModel model)
{
var httpContext = new DefaultHttpContext { RequestServices = _serviceProvider };
var actionContext = new ActionContext(httpContext, new RouteData(), new ActionDescriptor());
using (var sw = new StringWriter())
{
var viewResult = _viewEngine.GetView("~/", viewName, false);
if (!viewResult.Success)
{
throw new TemplatingException($"Failed to render template {viewName} because it was not found.");
}
var viewDictionary = new ViewDataDictionary(new EmptyModelMetadataProvider(), new ModelStateDictionary())
{
Model = model
};
try
{
var viewContext = new ViewContext(
actionContext,
viewResult.View,
viewDictionary,
new TempDataDictionary(actionContext.HttpContext, _tempDataProvider),
sw,
new HtmlHelperOptions()
);
await viewResult.View.RenderAsync(viewContext);
}
catch (Exception ex)
{
throw new TemplatingException("Failed to render template due to a razor engine failure", ex);
}
;
return sw.ToString();
}
}
public Task<string> RenderToStringAsync(string viewName)
{
return RenderToStringAsync(viewName, string.Empty);
}
}
完整的错误消息
at Microsoft.AspNetCore.Mvc.Razor.Internal.RazorViewCompiler.CompileAndEmit(String relativePath)
at Microsoft.AspNetCore.Mvc.Razor.Internal.RazorViewCompiler.OnCacheMiss(String normalizedPath)
--- End of stack trace from previous location where exception was thrown ---
at Microsoft.AspNetCore.Mvc.Razor.Internal.DefaultRazorPageFactoryProvider.CreateFactory(String relativePath)
at Microsoft.AspNetCore.Mvc.Razor.RazorViewEngine.CreateCacheResult(HashSet`1 expirationTokens, String relativePath, Boolean isMainPage)
at Microsoft.AspNetCore.Mvc.Razor.RazorViewEngine.LocatePageFromPath(String executingFilePath, String pagePath, Boolean isMainPage)
at Microsoft.AspNetCore.Mvc.Razor.RazorViewEngine.GetView(String executingFilePath, String viewPath, Boolean isMainPage)
at SalesPortals.Services.Templating.ViewRenderer.RenderToStringAsync[TModel](String viewName, TModel model) in E:\BuildAgent\work\be7b69c779fa7cc0\src\SalesPortals.Services.Templating\ViewRenderer.cs:line 44
at SalesPortals.Services.BusinessLogic.TemplateFacade.CreatePdf(String templateName, ITemplateModel request) in E:\BuildAgent\work\be7b69c779fa7cc0\src\SalesPortals.Services.BusinessLogic\TemplateFacade.cs:line 37
at SalesPortals.Services.WebHost.Controllers.TemplateController.HelloWorldPdfAsync(HelloWorldTemplateModel request) in E:\BuildAgent\work\be7b69c779fa7cc0\src\SalesPortals.Services.WebHost\Controllers\TemplateController.cs:line 34
at lambda_method(Closure , Object )
at Microsoft.AspNetCore.Mvc.Internal.ActionMethodExecutor.TaskOfActionResultExecutor.Execute(IActionResultTypeMapper mapper, ObjectMethodExecutor executor, Object controller, Object[] arguments)
at Microsoft.AspNetCore.Mvc.Internal.ControllerActionInvoker.InvokeActionMethodAsync()
at Microsoft.AspNetCore.Mvc.Internal.ControllerActionInvoker.InvokeNextActionFilterAsync()
at Microsoft.AspNetCore.Mvc.Internal.ControllerActionInvoker.Rethrow(ActionExecutedContext context)
at Microsoft.AspNetCore.Mvc.Internal.ControllerActionInvoker.Next(State& next, Scope& scope, Object& state, Boolean& isCompleted)
at Microsoft.AspNetCore.Mvc.Internal.ControllerActionInvoker.InvokeInnerFilterAsync()
at Microsoft.AspNetCore.Mvc.Internal.ResourceInvoker.InvokeNextResourceFilter()
at Microsoft.AspNetCore.Mvc.Internal.ResourceInvoker.Rethrow(ResourceExecutedContext context)
at Microsoft.AspNetCore.Mvc.Internal.ResourceInvoker.Next(State& next, Scope& scope, Object& state, Boolean& isCompleted)
at Microsoft.AspNetCore.Mvc.Internal.ResourceInvoker.InvokeFilterPipelineAsync()
at Microsoft.AspNetCore.Mvc.Internal.ResourceInvoker.InvokeAsync()
at Microsoft.AspNetCore.Builder.RouterMiddleware.Invoke(HttpContext httpContext)
at Microsoft.AspNetCore.StaticFiles.StaticFileMiddleware.Invoke(HttpContext context)
at Swashbuckle.AspNetCore.SwaggerUI.SwaggerUIMiddleware.Invoke(HttpContext httpContext)
at Swashbuckle.AspNetCore.Swagger.SwaggerMiddleware.Invoke(HttpContext httpContext, ISwaggerProvider swaggerProvider)
at Microsoft.AspNetCore.StaticFiles.StaticFileMiddleware.Invoke(HttpContext context)
at Microsoft.AspNetCore.Diagnostics.ExceptionHandlerMiddleware.Invoke(HttpContext context)
at Microsoft.AspNetCore.Diagnostics.ExceptionHandlerMiddleware.Invoke(HttpContext context)
at Microsoft.AspNetCore.Server.IISIntegration.IISMiddleware.Invoke(HttpContext httpContext)
at Microsoft.AspNetCore.Server.Kestrel.Core.Internal.Http.HttpProtocol.ProcessRequests[TContext](IHttpApplication`1 application)
答案 0 :(得分：1)
事实证明这很容易
<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|AnyCPU'">
<DocumentationFile>SalesPortals.Services.WebHost.xml</DocumentationFile>
<PreserveCompilationContext>true</PreserveCompilationContext>
<MvcRazorExcludeRefAssembliesFromPublish>false</MvcRazorExcludeRefAssembliesFromPublish>
<NoWarn>1701;1702;CS1591</NoWarn>
</PropertyGroup>
应该是
<PropertyGroup>
<DocumentationFile>SalesPortals.Services.WebHost.xml</DocumentationFile>
<PreserveCompilationContext>true</PreserveCompilationContext>
<MvcRazorExcludeRefAssembliesFromPublish>false</MvcRazorExcludeRefAssembliesFromPublish>
<NoWarn>1701;1702;CS1591</NoWarn>
</PropertyGroup>