BuildManager在启动MVC应用程序时抛出偶发​​异常

时间：2015-01-27 07:49:40

标签： c# asp.net-mvc codedom

我在使用BuildManager启动MVC5应用程序时注册动态集合。程序集使用CodeDOM（CSharpCodeProvider）在内存中编译，而不是写入磁盘：

[assembly: WebActivatorEx.PreApplicationStartMethod(typeof(MyWebApp.MyStartup), "Start")]
[assembly: WebActivatorEx.ApplicationShutdownMethodAttribute(typeof(MyWebApp.MyStartup), "Stop")]

namespace MyWebApp
{
    public static class MyStartup
    {
        public static void Start()
        {
            System.Reflection.Assembly[] assemblies = GetDynamicAssemblies();
            System.Array.ForEach(assemblies, a => System.Web.Compilation.BuildManager.AddReferencedAssembly(a));

        }

        private static System.Reflection.Assembly[] GetDynamicAssemblies()
        {
             //create and return dynamic assemblies using Codedom here
            return new System.Reflection.Assembly[] { }; 
        }

        public static void Stop()
        {
            //do cleanup if needed
        }
    }
}

我的Global.asax.cs非常标准：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Reflection;
using System.Web;
using System.Web.Http;
using System.Web.Mvc;
using System.Web.Optimization;
using System.Web.Routing;

namespace MyWebApp
{
    public class MvcApplication : System.Web.HttpApplication
    {
        protected void Application_Start()
        {
            AreaRegistration.RegisterAllAreas();
            GlobalConfiguration.Configure(WebApiConfig.Register);
            FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters);
            RouteConfig.RegisterRoutes(RouteTable.Routes);
            BundleConfig.RegisterBundles(BundleTable.Bundles);
        }
    }
}

我偶尔在启动时遇到以下异常，调试器不会破坏我的任何自定义代码。 我在这里缺少什么？

[NullReferenceException: Object reference not set to an instance of an object.]
   System.CodeDom.Compiler.CodeDomProvider.TryGetProbableCoreAssemblyFilePath(CompilerParameters parameters, String& coreAssemblyFilePath) +245
   Microsoft.CSharp.CSharpCodeGenerator.CmdArgsFromParameters(CompilerParameters options) +149
   Microsoft.CSharp.CSharpCodeGenerator.FromFileBatch(CompilerParameters options, String[] fileNames) +366
   Microsoft.CSharp.CSharpCodeGenerator.System.CodeDom.Compiler.ICodeCompiler.CompileAssemblyFromFileBatch(CompilerParameters options, String[] fileNames) +160
   System.CodeDom.Compiler.CodeDomProvider.CompileAssemblyFromFile(CompilerParameters options, String[] fileNames) +23
   System.Web.Compilation.AssemblyBuilder.Compile() +884
   System.Web.Compilation.BuildProvidersCompiler.PerformBuild() +9519768
   System.Web.Compilation.ApplicationBuildProvider.GetGlobalAsaxBuildResult(Boolean isPrecompiledApp) +9929000
   System.Web.Compilation.BuildManager.CompileGlobalAsax() +44
   System.Web.Compilation.BuildManager.EnsureTopLevelFilesCompiled() +269

[HttpException (0x80004005): Object reference not set to an instance of an object.]
   System.Web.Compilation.BuildManager.ReportTopLevelCompilationException() +62
   System.Web.Compilation.BuildManager.EnsureTopLevelFilesCompiled() +427
   System.Web.Compilation.BuildManager.CallAppInitializeMethod() +31
   System.Web.Hosting.HostingEnvironment.Initialize(ApplicationManager appManager, IApplicationHost appHost, IConfigMapPathFactory configMapPathFactory, HostingEnvironmentParameters hostingParameters, PolicyLevel policyLevel, Exception appDomainCreationException) +535

[HttpException (0x80004005): Object reference not set to an instance of an object.]
   System.Web.HttpRuntime.FirstRequestInit(HttpContext context) +9930508
   System.Web.HttpRuntime.EnsureFirstRequestInit(HttpContext context) +101
   System.Web.HttpRuntime.ProcessRequestNotificationPrivate(IIS7WorkerRequest wr, HttpContext context) +254

以下是已安装的nuget包供参考：

<?xml version="1.0" encoding="utf-8"?>
<packages>
  <package id="Antlr" version="3.4.1.9004" targetFramework="net45" />
  <package id="bootstrap" version="3.0.0" targetFramework="net45" />
  <package id="EntityFramework" version="6.1.1" targetFramework="net45" />
  <package id="jQuery" version="1.10.2" targetFramework="net45" />
  <package id="jQuery.Validation" version="1.11.1" targetFramework="net45" />
  <package id="Microsoft.AspNet.Cors" version="5.0.0" targetFramework="net45" />
  <package id="Microsoft.AspNet.Identity.Core" version="2.1.0" targetFramework="net45" />
  <package id="Microsoft.AspNet.Identity.EntityFramework" version="2.1.0" targetFramework="net45" />
  <package id="Microsoft.AspNet.Identity.Owin" version="2.1.0" targetFramework="net45" />
  <package id="Microsoft.AspNet.Mvc" version="5.2.2" targetFramework="net45" />
  <package id="Microsoft.AspNet.Razor" version="3.2.2" targetFramework="net45" />
  <package id="Microsoft.AspNet.SignalR.Core" version="2.2.0" targetFramework="net45" />
  <package id="Microsoft.AspNet.Web.Optimization" version="1.1.3" targetFramework="net45" />
  <package id="Microsoft.AspNet.WebApi" version="5.2.2" targetFramework="net45" />
  <package id="Microsoft.AspNet.WebApi.Client" version="5.2.2" targetFramework="net45" />
  <package id="Microsoft.AspNet.WebApi.Core" version="5.2.2" targetFramework="net45" />
  <package id="Microsoft.AspNet.WebApi.WebHost" version="5.2.2" targetFramework="net45" />
  <package id="Microsoft.AspNet.WebPages" version="3.2.2" targetFramework="net45" />
  <package id="Microsoft.jQuery.Unobtrusive.Validation" version="3.2.2" targetFramework="net45" />
  <package id="Microsoft.Owin" version="3.0.0" targetFramework="net45" />
  <package id="Microsoft.Owin.Cors" version="3.0.0" targetFramework="net45" />
  <package id="Microsoft.Owin.Host.SystemWeb" version="3.0.0" targetFramework="net45" />
  <package id="Microsoft.Owin.Security" version="3.0.0" targetFramework="net45" />
  <package id="Microsoft.Owin.Security.Cookies" version="3.0.0" targetFramework="net45" />
  <package id="Microsoft.Owin.Security.Facebook" version="3.0.0" targetFramework="net45" />
  <package id="Microsoft.Owin.Security.Google" version="3.0.0" targetFramework="net45" />
  <package id="Microsoft.Owin.Security.MicrosoftAccount" version="3.0.0" targetFramework="net45" />
  <package id="Microsoft.Owin.Security.OAuth" version="3.0.0" targetFramework="net45" />
  <package id="Microsoft.Owin.Security.Twitter" version="3.0.0" targetFramework="net45" />
  <package id="Microsoft.Web.Infrastructure" version="1.0.0.0" targetFramework="net45" />
  <package id="Modernizr" version="2.6.2" targetFramework="net45" />
  <package id="Newtonsoft.Json" version="6.0.4" targetFramework="net45" />
  <package id="Ninject" version="3.2.0.0" targetFramework="net45" />
  <package id="Ninject.Extensions.Conventions" version="3.2.0.0" targetFramework="net45" />
  <package id="Ninject.MVC5" version="3.2.1.0" targetFramework="net45" />
  <package id="Ninject.Web.Common" version="3.2.0.0" targetFramework="net45" />
  <package id="Ninject.Web.Common.WebHost" version="3.2.0.0" targetFramework="net45" />
  <package id="Owin" version="1.0" targetFramework="net45" />
  <package id="Respond" version="1.2.0" targetFramework="net45" />
  <package id="WebActivatorEx" version="2.0" targetFramework="net45" />
  <package id="WebGrease" version="1.5.2" targetFramework="net45" />
</packages>

1 个答案:

答案 0 :(得分：1)

对于那些发现这个老问题的人，它看起来与此类似

ASP.NET: This method cannot be called during the application's pre-start initialization stage

其中有更积极的讨论。

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