解决方式在<system.webServer>节点下设置maxQueryString值：
<system.webServer>
???<validation validateIntegratedModeConfiguration="false"/>
???<modules runAllManagedModulesForAllRequests="true"/>
???<security>
?????<requestFiltering>
???????<requestLimits maxQueryString="2097151" />
?????</requestFiltering>
???</security>
?</system.webServer>
url请求get方式字符过长
原文地址：http://www.cnblogs.com/redfull/p/7922025.html