类型 (System.Web.UI.WebControls.Label) 与控件类型 (ASP.controls_labelcontrol_ascx) 不兼容

Question

以下问题与 DotNetNuke 相关 - 但在我看来是与 asp.net 相关的错误，我非常感谢解决此问题的每一个提示。

我有以下问题：在我的开发环境（Win 8.1、SqlServer 2008 R2 express、VS2013）中全新安装 DotNetNuke 7.4.2 后编辑 Html 模块的内容时，最后显示的异常会出现。在测试环境（Win 2K8 server 64bit, SqlServer 2008 R2 express）安装7.4.2时，编辑模块没有错误，一切正常。

使用空数据库完成安装，修改 web.config 以指向该数据库并调用 http://dnndev.me/install/install.aspx。该网站有自己的应用程序池，并且应用程序池用户已被授予安装文件夹的必要权限。顺便说一句：从 DNN v4 开始，此过程已成功使用（有修改）。

谷歌搜索没有显示太多结果。我尝试清除“v4.0.30319\Temporary ASP.NET Files”文件夹 - 没有成功。

有谁知道这个错误的原因是什么？

感谢您的想法， 罗伯特

Error: is currently unavailable. DotNetNuke.Services.Exceptions.ModuleLoadException: 
The base class includes the field 'plCurrentWorkVersion', but its type (System.Web.UI.WebControls.Label) 
is not compatible with the type of control (ASP.controls_labelcontrol_ascx). 
---> System.Web.HttpParseException: The base class includes the field 'plCurrentWorkVersion', 
but its type (System.Web.UI.WebControls.Label) is not compatible with the type of control (ASP.controls_labelcontrol_ascx). 
---> System.Web.HttpParseException: The base class includes the field 'plCurrentWorkVersion', but its type (System.Web.UI.WebControls.Label) 
is not compatible with the type of control (ASP.controls_labelcontrol_ascx). 
at System.Web.Compilation.BaseTemplateCodeDomTreeGenerator.BuildFieldDeclaration(ControlBuilder builder) 
at System.Web.Compilation.BaseTemplateCodeDomTreeGenerator.BuildSourceDataTreeFromBuilder(ControlBuilder builder, Boolean fInTemplate, Boolean topLevelControlInTemplate, PropertyEntry pse) 
at System.Web.Compilation.BaseTemplateCodeDomTreeGenerator.BuildSourceDataTreeFromBuilder(ControlBuilder builder, Boolean fInTemplate, Boolean topLevelControlInTemplate, PropertyEntry pse) 
at System.Web.Compilation.BaseTemplateCodeDomTreeGenerator.BuildSourceDataTreeFromBuilder(ControlBuilder builder, Boolean fInTemplate, Boolean topLevelControlInTemplate, PropertyEntry pse) 
at System.Web.Compilation.TemplateControlCodeDomTreeGenerator.BuildMiscClassMembers() 
at System.Web.Compilation.BaseCodeDomTreeGenerator.BuildSourceDataTree() 
at System.Web.Compilation.BaseCodeDomTreeGenerator.GetCodeDomTree(CodeDomProvider codeDomProvider, StringResourceBuilder stringResourceBuilder, VirtualPath virtualPath) 
at System.Web.Compilation.BaseTemplateBuildProvider.GenerateCode(AssemblyBuilder assemblyBuilder) 
at System.Web.Compilation.AssemblyBuilder.AddBuildProvider(BuildProvider buildProvider) 
--- End of inner exception stack trace --- 
at System.Web.Compilation.AssemblyBuilder.AddBuildProvider(BuildProvider buildProvider) 
at System.Web.Compilation.BuildProvidersCompiler.ProcessBuildProviders() 
at System.Web.Compilation.BuildProvidersCompiler.PerformBuild() 
at System.Web.Compilation.BuildManager.CompileWebFile(VirtualPath virtualPath) 
at System.Web.Compilation.BuildManager.GetVPathBuildResultInternal(VirtualPath virtualPath, Boolean noBuild, Boolean allowCrossApp, Boolean allowBuildInPrecompile, Boolean throwIfNotFound, Boolean ensureIsUpToDate) 
at System.Web.Compilation.BuildManager.GetVPathBuildResultWithNoAssert(HttpContext context, VirtualPath virtualPath, Boolean noBuild, Boolean allowCrossApp, Boolean allowBuildInPrecompile, Boolean throwIfNotFound, Boolean ensureIsUpToDate) 
at System.Web.Compilation.BuildManager.GetVPathBuildResult(HttpContext context, VirtualPath virtualPath, Boolean noBuild, Boolean allowCrossApp, Boolean allowBuildInPrecompile, Boolean ensureIsUpToDate) 
at System.Web.UI.TemplateControl.LoadControl(VirtualPath virtualPath) 
at DotNetNuke.UI.ControlUtilities.LoadControl[T](TemplateControl containerControl, String ControlSrc) 
at DotNetNuke.UI.Modules.ModuleControlFactory.LoadModuleControl(TemplateControl containerControl, ModuleInfo moduleConfiguration) 
at DotNetNuke.UI.Modules.ModuleHost.LoadModuleControl() 
--- End of inner exception stack trace ---

相关的标记代码是

<asp:Label id="plCurrentWorkVersion" runat="server" text="Version" ResourceKey="plCurrentWorkVersion"  />

Answer 1

如果您已经删除了该站点，那么检查可能为时已晚，但我会检查该站点下是否存在 DesktopModules 上的 Application/VirtualDirectory 或其中的任何子文件夹。这是我在 Visual Studio 中的模板的常见问题，出于某种原因，VS 会随机将这些文件夹变成一个单独的应用程序，这会导致各种混乱，直到您在 IIS 中删除该应用程序。

Answer 2

站点 dnndev.me（及其应用程序）以前曾用于其他安装。

删除并重新创建站点（暗示应用程序）解决了错误（请注意，创建一个新的应用程序池是不够的）。

如果有对此的解释，我将不胜感激。

编辑：将当前的 applicationHost.config 与旧版本进行比较显示了错误的原因：有一个附加条目指向另一个旧版本中路径的完全限定名称。这导致使用两个版本进行编译（这是 Panagiotis 已经编写的）。