[HttpException (0x80004005): 没有为扩展名“.html”注册的生成提供程序。可以在 machine.config 或 web.config 中的 <compilation><buildProviders> 节注册一个。请确保所注册的提供程序具有包含值“Web”或“All”的 BuildProviderAppliesToAttribute 特性。]   System.Web.Compilation.CompilationUtil.GetBuildProviderTypeFromExtension(CompilationSection config, String extension, BuildProviderAppliesTo neededFor, Boolean failIfUnknown) +12450941   System.Web.Compilation.BuildManager.CreateBuildProvider(VirtualPath virtualPath, BuildProviderAppliesTo neededFor, CompilationSection compConfig, ICollection referencedAssemblies, Boolean failIfUnknown) +58   System.Web.Compilation.BuildManager.CompileWebFile(VirtualPath virtualPath) +525   System.Web.Compilation.BuildManager.GetVPathBuildResultInternal(VirtualPath virtualPath, Boolean noBuild, Boolean allowCrossApp, Boolean allowBuildInPrecompile, Boolean throwIfNotFound, Boolean ensureIsUpToDate) +571   System.Web.Compilation.BuildManager.GetVPathBuildResultWithNoAssert(HttpContext context, VirtualPath virtualPath, Boolean noBuild, Boolean allowCrossApp, Boolean allowBuildInPrecompile, Boolean throwIfNotFound, Boolean ensureIsUpToDate) +203   System.Web.Compilation.BuildManager.GetVirtualPathObjectFactory(VirtualPath virtualPath, HttpContext context, Boolean allowCrossApp, Boolean throwIfNotFound) +249   System.Web.Compilation.BuildManager.CreateInstanceFromVirtualPath(VirtualPath virtualPath, Type requiredBaseType, HttpContext context, Boolean allowCrossApp) +56   System.Web.UI.PageHandlerFactory.GetHandlerHelper(HttpContext context, String requestType, VirtualPath virtualPath, String physicalPath) +42   System.Web.MaterializeHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +516   System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +288