ajax cascadingdropdown

Posted on 2007-08-07
Last Modified: 2013-11-26
When I have added following line just above the Webservice class declaration, the Cascading Dropdown functionality is started working for me.


It's amazing. But soon I noticed some limitations with Cascading Dropdown. When i tried to populate large amount of data it again started throwing [Method Error 500] error. This error is not related to the number items in the drop down. I think this is related to amount of data being populated in the dropdown. The functionality works if I have limited data. But if the no of item/ size of item increase the problem starts.

Does anyone know solution to this problem? Your immediate help is much appreciated.
Question by:devdept
    LVL 16

    Accepted Solution

    In your web.config, locate the section

        <!-- add the following line.  The number indicates the max number of characters returned from web services -->
                 <jsonSerialization maxJsonLength="50000000"></jsonSerialization>

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