要在web.config中加入
<configSections>
<section name="ExtAspNet" type="ExtAspNet.ConfigSection, ExtAspNet" requirePermission="false"/>
<section name="FineUI" type="FineUI.ConfigSection, FineUI" requirePermission="false" />
</configSections>
<FineUI DebugMode="true" />
<ExtAspNet EnableBigFont="true" DebugMode="true" EnableAjax="true"></ExtAspNet>