.net post请求过长 , 超过配置 maxQueryStringLength值

<configuration>
    <system.web>
      <compilation debug="true" targetFramework="4.5" />
      <httpRuntime targetFramework="4.5" maxQueryStringLength="102400"  />
    </system.web>
    <system.webServer>
        <security>
            <requestFiltering>
                <requestLimits maxQueryString="102400" />
            </requestFiltering>
        </security>
    </system.webServer>

</configuration>