System.NullReferenceException: 未将对象引用设置到对象的实例。 在 URLRewriter.ModuleRewriter.Rewrite(String requestedPath, HttpApplication app) 在 URLRewriter.BaseModuleRewriter.BaseModuleRewriter_AuthorizeRequest(Object sender, EventArgs e) 在 System.Web.HttpApplication.SyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() 在 System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)