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我在 Asp.net mvc 框架上开发了门户。我在 godaddy 托管这个网站。我在集成第三方 dll 时遇到了很大的问题，即 NPOI（excel writer dll）。它显示以下错误。

安全异常

**Description**: *The application attempted to perform an operation not allowed by the security policy.  To grant this application the required permission please contact your system administrator or change the application's trust level in the configuration file.*

**Exception Detail*s**:* System.Security.SecurityException: That assembly does not allow partially trusted callers.

   **Source Error:**

    *An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.*

堆栈跟踪：

[SecurityException: That assembly does not allow partially trusted callers.]
   ETravel.Web.Modules.Travel.Controllers.Admin.ReportController.TravelTaxList() in ReportController.cs:853
   lambda_method(ExecutionScope , ControllerBase , Object[] ) +39
   System.Web.Mvc.ActionMethodDispatcher.Execute(ControllerBase controller, Object[] parameters) +17
   System.Web.Mvc.ReflectedActionDescriptor.Execute(ControllerContext controllerContext, IDictionary`2 parameters) +178
   System.Web.Mvc.ControllerActionInvoker.InvokeActionMethod(ControllerContext controllerContext, ActionDescriptor actionDescriptor, IDictionary`2 parameters) +24
   System.Web.Mvc.<>c__DisplayClassa.<InvokeActionMethodWithFilters>b__7() +52
   System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodFilter(IActionFilter filter, ActionExecutingContext preContext, Func`1 continuation) +254
   System.Web.Mvc.<>c__DisplayClassc.<InvokeActionMethodWithFilters>b__9() +19
   System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodFilter(IActionFilter filter, ActionExecutingContext preContext, Func`1 continuation) +254
   System.Web.Mvc.<>c__DisplayClassc.<InvokeActionMethodWithFilters>b__9() +19
   System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodFilter(IActionFilter filter, ActionExecutingContext preContext, Func`1 continuation) +254
   System.Web.Mvc.<>c__DisplayClassc.<InvokeActionMethodWithFilters>b__9() +19
   System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodWithFilters(ControllerContext controllerContext, IList`1 filters, ActionDescriptor actionDescriptor, IDictionary`2 parameters) +192
   System.Web.Mvc.ControllerActionInvoker.InvokeAction(ControllerContext controllerContext, String actionName) +399
   System.Web.Mvc.Controller.ExecuteCore() +126
   System.Web.Mvc.ControllerBase.Execute(RequestContext requestContext) +27
   System.Web.Mvc.ControllerBase.System.Web.Mvc.IController.Execute(RequestContext requestContext) +7
   System.Web.Mvc.MvcHandler.ProcessRequest(HttpContextBase httpContext) +151
   System.Web.Mvc.MvcHandler.ProcessRequest(HttpContext httpContext) +57
   System.Web.Mvc.MvcHandler.System.Web.IHttpHandler.ProcessRequest(HttpContext httpContext) +7
   System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +181
   System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +75

为了解决这个问题，我在 web.config 文件中添加了这个代码行。

<compilation debug="true">
   <assemblies>
.....................    .............
        <add assembly ="NPOI, Version=1.2.1.0, Culture=neutral, PublicKeyToken=0df73ec7942b34e1"/>
        <add assembly="NPOI.POIFS, Version=1.2.1.0, Culture=neutral, PublicKeyToken=0df73ec7942b34e1"/>
        <add assembly ="NPOI.HPSF, Version=1.2.1.0, Culture=neutral, PublicKeyToken=0df73ec7942b34e1"/>
        <add assembly ="NPOI.Util, Version=1.2.1.0, Culture=neutral, PublicKeyToken=0df73ec7942b34e1"/>
   </assemblies>
  </compilation>

和 [assembly: AllowPartiallyTrustedCallers()] 到 Assemblyinfo.cs。但是磨损不起作用。主要问题是什么，解决方案是什么？？？请帮助我...

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1 回答 1

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不，NPOI 需要允许部分受信任的调用者。它可能正在做一些在中等信任环境中不起作用的幕后工作。

查看NPOI 网站，它看起来像是在去年底更新为在中等信任环境中运行，但那是在 1.2.1 发布之后。您应该尝试最新版本 1.2.3 测试版，以查看该更新是否已进入，以及是否会为您修复它。

于 2010-11-10T12:46:47.827 回答