asp.net json 400 bat requestについて（データサイズの大きいリクエスト）

Web.configの設定を見なおして対応

<?xml version="1.0" encoding="utf-8"?>
<configuration>
 <system.web>
  <compilation targetFramework="4.0" />
 </system.web>
 <system.serviceModel>
  <!-- WCFがASP.NET環境で動くように -->
  <serviceHostingEnvironment aspNetCompatibilityEnabled="true" />
  <standardEndpoints>
   <webHttpEndpoint>
    <standardEndpoint name="" helpEnabled="true" automaticFormatSelectionEnabled="true" maxBufferSize="2147483647" maxReceivedMessageSize="2147483647">
     <readerQuotas maxDepth="2147483647" maxStringContentLength="2147483647" maxArrayLength="2147483647" maxBytesPerRead="2147483647" maxNameTableCharCount="2147483647" />
    </standardEndpoint>
   </webHttpEndpoint>
  </standardEndpoints>
 </system.serviceModel>
</configuration>