使用NHUnspell NuGet包时无法加载文件或程序集Hunspellx64.dll？

Question

我有一个ASP.NET/MVC角色，它使用NHUnspell NuGet包。当我尝试运行它时，我会得到以下错误消息：

Could not load file or assembly 'Hunspellx64.dll' or one of its dependencies. The module was expected to contain an assembly manifest.

这很奇怪，因为据我所知，我的Web角色项目不应该试图加载非托管Hunspellx64.dll。应该由托管的NHUnspell DLL处理。将该DLL复制到/bin角色的目录，作为构建步骤。

更新：，感谢托马斯关于WebActivator已经过时的评论，我能够解决这个问题。我正在复制我对他接受的答案的回复评论，以确保其他有此问题的人看到修复：

在这个错误发生之前，我已经让NHUnspell成功地工作了。失败的是用AttributeRouting安装了NuGet。AttributeRouting拖放旧版本的WebActivator (1.0.0.0)。不幸的是，当您执行更新操作时，NuGet不建议对它进行更新。您必须按照此网页的说明，通过Package控制台手动进行更新： http://www.nuget.org/packages/WebActivator

这里是在收到修复之前的原始帖子的其余部分：

我已经搜索了我的项目，寻找到Hunspellx64.dll 64. DLL的直接引用/链接。DLL包括我的NuGet包配置、packages.config、web.config、我的引用列表、原始项目文件等等。我找不到对该DLL的任何直接引用。我还可以在哪里查看，或者我还可以尝试阻止项目直接加载该非托管DLL？下面是ASP.NET错误转储：

[BadImageFormatException: Could not load file or assembly 'Hunspellx64.dll' or one of its dependencies. The module was expected to contain an assembly manifest.]
   System.Reflection.RuntimeAssembly._nLoad(AssemblyName fileName, String codeBase, Evidence assemblySecurity, RuntimeAssembly locationHint, StackCrawlMark& stackMark, IntPtr pPrivHostBinder, Boolean throwOnFileNotFound, Boolean forIntrospection, Boolean suppressSecurityChecks) +0
   System.Reflection.RuntimeAssembly.nLoad(AssemblyName fileName, String codeBase, Evidence assemblySecurity, RuntimeAssembly locationHint, StackCrawlMark& stackMark, IntPtr pPrivHostBinder, Boolean throwOnFileNotFound, Boolean forIntrospection, Boolean suppressSecurityChecks) +34
   System.Reflection.RuntimeAssembly.InternalLoadAssemblyName(AssemblyName assemblyRef, Evidence assemblySecurity, RuntimeAssembly reqAssembly, StackCrawlMark& stackMark, IntPtr pPrivHostBinder, Boolean throwOnFileNotFound, Boolean forIntrospection, Boolean suppressSecurityChecks) +152
   System.Reflection.RuntimeAssembly.InternalLoadFrom(String assemblyFile, Evidence securityEvidence, Byte[] hashValue, AssemblyHashAlgorithm hashAlgorithm, Boolean forIntrospection, Boolean suppressSecurityChecks, StackCrawlMark& stackMark) +102
   System.Reflection.Assembly.LoadFrom(String assemblyFile) +34
   WebActivator.PreApplicationStartCode.Start() in D:\Code\Bitbucket\WebActivator\WebActivator\PreApplicationStartCode.cs:11

[InvalidOperationException: The pre-application start initialization method Start on type WebActivator.PreApplicationStartCode threw an exception with the following error message: Could not load file or assembly 'Hunspellx64.dll' or one of its dependencies. The module was expected to contain an assembly manifest..]
   System.Web.Compilation.BuildManager.InvokePreStartInitMethodsCore(ICollection`1 methods, Func`1 setHostingEnvironmentCultures) +550
   System.Web.Compilation.BuildManager.InvokePreStartInitMethods(ICollection`1 methods) +132
   System.Web.Compilation.BuildManager.CallPreStartInitMethods(String preStartInitListPath) +90
   System.Web.Compilation.BuildManager.ExecutePreAppStart() +135
   System.Web.Hosting.HostingEnvironment.Initialize(ApplicationManager appManager, IApplicationHost appHost, IConfigMapPathFactory configMapPathFactory, HostingEnvironmentParameters hostingParameters, PolicyLevel policyLevel, Exception appDomainCreationException) +516

[HttpException (0x80004005): The pre-application start initialization method Start on type WebActivator.PreApplicationStartCode threw an exception with the following error message: Could not load file or assembly 'Hunspellx64.dll' or one of its dependencies. The module was expected to contain an assembly manifest..]
   System.Web.HttpRuntime.FirstRequestInit(HttpContext context) +9874568
   System.Web.HttpRuntime.EnsureFirstRequestInit(HttpContext context) +101
   System.Web.HttpRuntime.ProcessRequestNotificationPrivate(IIS7WorkerRequest wr, HttpContext context) +254

Answer 1

WebActivator启动方法不处理bin文件夹中的非托管DLL。正如您在代码文件中看到的那样：https://bitbucket.org/dfowler/webactivator/src/4c558d93cf3a/WebActivator/PreApplicationStartCode.cs

 public static void Start() {
            lock (initLock) {
                if (!hasInited) {
                    // Go through all the bin assemblies
                    foreach (var assemblyFile in GetAssemblyFiles()) {
                        var assembly = Assembly.LoadFrom(assemblyFile);

                        // Go through all the PreApplicationStartMethodAttribute attributes
                        // Note that this is *our* attribute, not the System.Web namesake
                        foreach (PreApplicationStartMethodAttribute preStartAttrib in assembly.GetCustomAttributes(
                            typeof(PreApplicationStartMethodAttribute),
                            inherit: false)) {

                            // If it asks to be called after global.asax App_Start, keep track of the method. Otherwise call it now
                            if (preStartAttrib.CallAfterGlobalAppStart && HostingEnvironment.IsHosted) {
                                attribsToCallAfterStart.Add(preStartAttrib);
                            }
                            else {
                                // Invoke the method that the attribute points to
                                preStartAttrib.InvokeMethod();
                            }
                        }
                    }

Start()方法将所有DLL作为程序集加载以探测其PreApplicationStartMethodAttribute。这对于非托管DLL失败，因为没有程序集清单。

看起来你用的是树枝(dfolwler?)或过时版本的WebActivator，因为当前版本可以通过忽略程序集加载上的所有异常来处理此问题。

private static IEnumerable<Assembly> Assemblies
{
    get
    {
        if (_assemblies == null)
        {
            // Cache the list of relevant assemblies, since we need it for both Pre and Post
            _assemblies = new List<Assembly>();
            foreach (var assemblyFile in GetAssemblyFiles())
            {
                try
                {
                    // Ignore assemblies we can't load. They could be native, etc...
                    _assemblies.Add(Assembly.LoadFrom(assemblyFile));
                }
                catch
                {
                }
            }
        }

        return _assemblies;
    }
}

将WebActivator更新为最新版本。