未将对象引用设置到对象的实例。 在 Cmecexpo.Views.View_ae8f696476894f529850579bbef2aafc.Viewf6079c422b0d4a61b8aec494808e7395.RenderViewLevel0() 在 Spark.SparkViewBase.DelegateFirstRender(Action render) 在 Cmecexpo.Views.View_ae8f696476894f529850579bbef2aafc.Viewf6079c422b0d4a61b8aec494808e7395.Render() 在 Spark.SparkViewBase.RenderView(TextWriter writer) 在 Nancy.ViewEngines.Spark.NancySparkView.Execute() 在 Cmecexpo.Spark.Engine.<>c__DisplayClass13_1.b__0(Stream stream)